DJI P4 MULTISPECTRAL User guide

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MULTISPECTRAL

User Manual

2019.12

v1.0

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Using This Manual

Legend

Warning Important Hints and Tips Reference

Before Flight

The following documents have been produced to help you safely operate and make full use of your aircraft:

1. In the Box

2. User Manual

3. Quick Start Guide

4. Disclaimer and Safety Guidelines

It is recommended to watch all tutorial videos on the ocial DJITM website and read the disclaimer and safety guidelines before rst time use. Prepare for your rst ight by reviewing the quick start

guide. Refer to this user manual for more details.

Video Tutorials

Go to the address below or scan the QR code on the right to watch the tutorial

videos, which demonstrate how to use the P4 Multispectral safely:

https://www.dji.com/p4-multispectral/video

Download DJI GS Pro App

The latest version of DJI GS Pro is required when using with the P4 Multispectral. Search for DJI GS Pro in App Store or scan the QR code to download the app on your iPad. Visit the ocial DJI website for more information about DJI GS Pro.

https://www.dji.com/ground-station-pro

Download DJI Terra

The multispectral images captured by the P4 Multispectral can be imported into DJI Terra for 2D multispectral map reconstructions. To download the latest version of DJI Terra and its user

manual, please visit: https://www.dji.com/dji-terra/info#downloads

The operating temperature of this product is 0° to 40° C. It does not meet the standard operating

temperature for military grade application (-55° to 125° C), which is required to endure greater

environmental variability. Operate the product appropriately and only for applications that it meets the

operating temperature range requirements of that grade.

Contents

Using This Manual

Legend

Before Flight

Video Tutorials

Download DJI GS Pro App

Download DJI Terra

Product Prole

Introduction

Feature Highlights

Preparing the Aircraft

Activating the Aircraft

Aircraft Overview

Remote Controller Overview

Aircraft

Prole

Flight Modes

Aircraft Status Indicators

Return to Home (RTH)

Aerial Photography Missions

RTK Functions

Vision System and Infrared Sensing System

Flight Recorder

Attaching and Detaching the Propellers

DJI Intelligent Flight Battery

Gimbal Cameras

Cameras

Gimbal

Remote Controller

Prole

Using the Remote Controller

Remote Controller Status LED

Linking the Remote Controller

Flight

Flight Environment Requirements

GEO (Geospatial Environment Online) System

Flight Restrictions

GEO Unlocking

PreightChecklist

Calibrating the Compass

Starting/Stopping the Motors

StoppingMotorsMid-ight

Flight Test

DJI Assistant 2 for Phantom

Installation and Launching

Using DJI Assistant 2 for Phantom

Appendix

Specications 51

Product Prole

This section introduces the and lists the components of the aircraft and remote controller.

P4 Multispectral

Product Prole

Introduction

The P4 Multispectral is a high-precision drone capable of multispectral imaging functions. The

imaging system contains six cameras with 1/2.9-inch CMOS sensors, capable of capturing both

color and narrow band images. The OCUSYNCTM HD image transmission built into both the

aircraft and remote controller ensures stable transmission. Using DJI GS Pro, users can view the normalized dierence vegetation index (NDVI) image in real time and gain insights into plant

health, understanding plant growth, soil conditions, and more. The images can also be used to

generate accurate multispectral index maps for detailed plant and soil status analyses, which

enable more precise agricultural operations. The aircraft has a built-in DJI Onboard D-RTKTM,

which provides precision data for centimeter-level positioning accuracy*.

Feature Highlights

The P4 Multispectral imaging system contains six cameras with 1/2.9-inch CMOS sensors, including an RGB camera and a multispectral camera array containing ve cameras for multispectral

imaging, covering the following bands: Blue (B): 450 nm ± 16 nm; Green (G): 560 nm ± 16 nm; Red

(R): 650 nm ± 16 nm; Red edge (RE): 730 nm ± 16 nm; Near-infrared (NIR): 840 nm ± 26 nm. The

spectral sunlight sensor on top of the aircraft detects the solar irradiance in real-time for image

compensation, maximizing the accuracy of collected multispectral data. The P4 Multispectral

uses a global shutter to avoid distortions that might be present when using a rolling shutter.

The P4 Multispectral aircraft has a built-in DJI Onboard D-RTK, providing high-precision data for centimeter-level positioning when used with Network RTK service or a DJI D-RTK 2. Raw satellite observations and exposure event records can be used for post-processed kinematic (PPK) dierential corrections (supported later).

The P4 Multispectral can hover and y in extremely low altitude and indoor environments, and

provides multi-directional obstacle sensing and vision positioning functions. Obstacles detection

and avoidance in large range and landing protection enhance ight safety.

Built into the remote controller is the latest DJI OcuSync technology with enhanced anti-

interference capability to deliver a more stable and smoother image transmission. When combined

with the receiver in the aircraft, the remote controller has a transmission range up to 4.3 mi / 7 km

(FCC-compliant version). Connect an iPad to the remote controller via the USB port to use DJI GS Pro app to plan and perform missions.

Import the image data into DJI GS Pro or DJI Terra to generate multispectral index maps** and

view the analysis.

* This should be used with Network RTK service, a DJI D-RTK 2 High-Precision GNSS Mobile Station

(purchased additionally) or post-processed kinematic (PPK) data (recommended when RTK signal is

weak during operation).

** Support for multispectral index maps in DJI GS Pro is coming soon.

P4 Multispectral User Manual

Preparing the Aircraft

1. Remove the gimbal clamp from the camera as shown in the gure.

2. Attaching the Propellers

Mount the propellers with black propeller rings to the motors with black dots. Mount the

propellers with sliver propeller rings to the motors without black dots. Press the propeller down

onto the mounting plate and rotate in the lock direction until it is secured.

3. Battery Installation

Slide battery into the battery compartment according to the arrow’s direction as shown below.

When the upper and lower buckles on the battery are in place, a click sound indicates the battery is

securely installed. Failure to do so may aect the ight safety of your aircraft.

P4 Multispectral User Manual

Preparing the Remote Controller

1. Tilt the mobile device holder or the display device on the remote controller to the desired

position, then adjust the antennas so they are facing outward.

2. Connecting your mobile device

Press the button on the top right side of the mobile device holder to release the clamp, then

adjust the clamp to t the size of your mobile device.

Secure your mobile device in the clamp by pressing down.

Plug one end of the cable into the mobile device, and the other end into the USB port on

the back of the remote controller.

Activating the Aircraft

When using your P4 Multispectral for the rst time, activate it using DJI GS Pro. Ensure that your iPad has access to the internet.

Aircraft Overview

P4 Multispectral User Manual

1. Gimbal Cameras

(with six cameras corresponding to the

wave bands below)

a. Red Edge (RE) b. Near-Infrared (NIR)

c. Green (G) d. Visible Light (RGB)

e. Red (R) f. Blue (B)

2. Downward Vision System

3. Micro USB Port

4. Camera/Linking Status Indicator and Link

Button

5. Camera microSD Card Slot

6. Forward Vision System

7. Infrared Sensing System

8. Front LEDs

9. Motors

10. Propellers

11. Aircraft Status Indicators

12. OcuSync Antennas

13. Onboard D-RTK Antenna

14. Spectral Sunlight Sensor

15. Rear Vision System

16. Intelligent Flight Battery

17. Power Button

18. Battery Level Indicators

P4 Multispectral User Manual

Remote Controller Overview

1819

1. Power Button Used to turn the remote controller on and o.

2. Return to Home (RTH) Button

Press and hold this button to initiate RTH.

3. Control Sticks

Controls aircraft movement. Can be set to

Mode 1, Mode 2, or Mode 3.

4. Status LED

Indicates whether the remote controller is

linked to the aircraft.

5. Battery Level LEDs

Displays the battery level of the remote

controller.

6. Power Port

Connect to the charger to charge the

battery of the remote controller.

7. Mobile Device Holder

Securely mounts your mobile device to the

remote controller.

8. Small Device Positioning Tabs (for mobile

phones)

9. Antennas

Relays aircraft control and image

transmission signals.

10. Handle Bar

11. Gimbal Dial

Use this dial to control the tilt of the

gimbal.

12. Reserved Dial

13. Video Recording Button Press to start recording video. Press again

to stop recording. (Video recording feature

available soon)

14. Flight Mode Switch

The P and S positions on the remote

controller are for P-mode, and the A position is for A-mode.

15. Shutter Button

Press to take a photo. Two-stage button.

Pictures will only be taken when the

shutter button is fully pressed.

16. Reserved Blank Button

17. C1 and C2 Buttons (customizable, custom

functions available soon)

18. USB Port (for mobile device connection) Connection to mobile device for DJI GS Pro.

19. Micro USB Port

Connects to a computer via a Micro USB

cable for conguration.

Aircraft

This section introduces the aircraft components, features and functions.

Aircraft

Profile

The P4 Multispectral aircraft includes a ight controller, a communication system, a positioning

system, a propulsion system and an Intelligent Flight Battery. This section describes the functions

of these components.

Flight Modes

The P4 Multispectral provides the following flight modes. Use the flight mode switch on the remote controller to switch between dierent ight modes. The P and S positions on the remote controller are for P-mode, and the A position is for A-mode.

P-mode (Positioning): P-mode works best when the GNSS signal is strong. The aircraft utilizes the GNSS / RTK module and Vision System to automatically stabilize itself and navigate between obstacles. When the GNSS signal is strong, the aircraft uses GNSS for positioning. When RTK

module is enabled and the differential data transmission is good, it provides centimeter-level

positioning. When the GNSS signal is weak and the lighting conditions are sucient, the aircraft uses Vision System for positioning. When the forward obstacle sensing is enabled and lighting conditions are sucient, the maximum ight attitude angle is 25° with a maximum ight speed of 31 mph (50 kph). When forward obstacle sensing is disabled, the maximum ight attitude angle is 35° and the maximum ight speed is 36 mph (58 kph).

A-mode (Attitude): GNSS is not used for positioning and the aircraft can only maintain altitude

using the barometer.

Attitude Mode Warning

The aircraft will enter A-mode in the following two instances:

Passive: When there is weak GNSS signal or when the compass experiences interference where the Vision System is unavailable.

Active: Users toggle the flight mode switch to A-mode.

In A-mode, the Vision System and some advanced features are disabled. Therefore, the aircraft cannot position or auto-brake in this mode and is easily affected by its surroundings, which may result in horizontal shifting. Use the remote controller to position the aircraft.

Maneuvering the aircraft in A-mode can be difficult. Before switching the aircraft into A-mode, make sure you are comfortable flying in this mode. DO NOT fly the aircraft too

far away as you might lose control and cause a potential hazard. Avoid ﬂying in conﬁned

spaces or in areas where the GNSS signal is weak. Otherwise, the aircraft will enter A-mode,

leading to potential ﬂight risks. Land the aircraft in a safe place as soon as possible.

P4 Multispectral User Manual

Aircraft Status Indicators

The P4 Multispectral has Front LEDs and Aircraft Status Indicators. The positions of these LEDs are shown in the gure below:

Front LEDs

Aircraft Status Indicators

The Front LEDs show the orientation of the aircraft. The Front LEDs glow solid red when the aircraft is turned on to indicate the front (or nose) of the aircraft. The Aircraft Status Indicators communicate the system status of the ight controller. Refer to the table below for more information about the Aircraft Status Indicators.

Aircraft Status Indicator Description

Normal

Alternate red, green and yellow ashing

Alternate green and yellow ashing Warming Up

Slow green ashing P-mode with GNSS or RTK

×2 Two green ashes P-mode with Vision System

Slow yellow ashing

Fast green ashing Braking

Warning

Fast yellow ashing Remote Controller Signal Lost

Slow red ashing Low Battery Warning

Fast red ashing Critical Battery Warning

Red ashing

— Solid red Critical Error

Alternate red and yellow ashing Compass Calibration Required

Turning On and Self Diagnostic

Testing

A-mode but No GNSS or Vision

System

Uneven Placement or Large Sensors

Bias

P4 Multispectral User Manual

Return to Home (RTH)

Return to Home (RTH) function brings the aircraft back to the last recorded Home Point. There are three types of RTH: Smart RTH, Low Battery RTH, and Failsafe RTH. This section describes

these three scenarios in detail.

GNSS

Description

If a strong GNSS signal was acquired before takeoff, the Home Point is the

Home

Point

location from which the aircraft launched. The GNSS signal strength is indicated by the GNSS icon ( Less than 4 bars is considered a weak GNSS signal).

The aircraft status indicators will blink rapidly when the home point is recorded.

The aircraft can sense and avoid obstacles when the Forward Vision System is enabled and lighting conditions are sucient. The aircraft will automatically climb up to avoid obstacles and descend slowly as it returns to the Home Point. To ensure the aircraft returns home forwards, it cannot rotate or y left and right during RTH while the Forward Vision System is enabled.

Failsafe RTH

The Forward Vision System allows the aircraft to create a real-time map of its ight route as it ies. If the Home Point was successfully recorded and the compass is functioning normally, Failsafe

RTH will be automatically activated if the remote controller signal is lost for more than three

seconds. The aircraft will plan its return route and retrace its original ight route home. During

RTH, if the remote controller signal is recovered, users can control the aircraft altitude and speed.

Press the RTH button once to cancel RTH.

Failsafe Illustration

1 Record Home Point

Blinking Green

Signal Lost Lasts (after 3 sec.)

>3S

× ×

Fast Blinking Yellow

2 Conrming Home Point

Blinking Green

RTH (adjustable altitude)

Height over HP>Failsafe Altitude

Elevate to Failsafe Altitude

Failsafe Altitude

Fast Blinking Yellow

Height over HP<=Failsafe Altitude

3 Remote Controller Signal Lost

Fast Blinking Yellow

6 Landing (after hovering for 5 secs)

Fast Blinking Yellow

Smart RTH

Use the RTH button on the remote controller when GNSS is available to initiate Smart RTH. The

aircraft will then automatically return to the last recorded Home Point. Use the remote controller to control the aircraft’s speed or altitude to avoid a collision during the Smart RTH process. As

the aircraft returns, it will use the primary camera to identify obstacles as far as 300m in front,

allowing it to plan a safe route home. Press and hold the Smart RTH button once to start the

process, and press the Smart RTH button again to terminate the procedure and regain full

control of the aircraft.

P4 Multispectral User Manual

Low Battery RTH

The low battery level failsafe is triggered when the DJI Intelligent Flight Battery is depleted to a point that may aect the safe return of the aircraft. The user can cancel the RTH procedure

by pressing the RTH button on the remote controller. The thresholds for these warnings are

automatically determined based on the aircraft’s current altitude and distance from the Home

Point. The Low Battery RTH will only be triggered once during the same ight.

The aircraft will land automatically if the current battery level can only support the aircraft long

enough to descend from its current altitude. The user cannot cancel the auto landing but can use

the remote controller to alter the aircraft’s orientation during the landing process.

The Battery Level Indicator is displayed in DJI GS Pro, and is described below:

Critical Low battery level warning

(Red)

Low battery

level warning (Yellow)

Sucient battery

level (Green)

Remaining ight time

Battery Level

Warning

Low battery

level warning

Critical Low

battery level warning

Estimated

remaining ight

time

Power requires to return home

Remark

Battery power is low. Fly the aircraft back.

The aircraft must land immediately.

Estimated remaining flight based on current battery level.

12:29

Battery level Indicator

Aircraft

Status

DJI GS Pro Flight Instructions

Indicator

The aircraft will return to the

Home Point automatically and

Aircraft

status indicator blinks RED slowly.

N/A

hover at 2 meters above the

Home Point. Users can also

cancel the RTH process and

land manually. Note: The Low Battery Level Warning will not

prompt after users cancel RTH and regain control.

DJI GS Pro

display will

ash red and

Aircraft

status indicator blinks RED

quickly.

the aircraft will start to descend. The remote controller will sound an

Allow the aircraft to descend

and land automatically.

alarm.

N/A N/A N/A

P4 Multispectral User Manual

When the Critical low battery level warning is triggered and the aircraft begins to land automatically,

push the left stick upward to make the aircraft hover at its current altitude, giving you an opportunity to navigate to a more appropriate landing location.

The colored zones and markers on the battery level indicator bar reect the estimated remaining

ight time. They are automatically adjusted according to the aircraft’s current location and status.

The Low Battery Warning threshold set in the Aircraft Battery settings page in the app is only for an

alert and will not trigger RTH.

Precision Landing

The aircraft automatically scans and attempts to match the terrain features underneath during

Return to Home. When current terrain matches home point terrain, the aircraft will start landing

immediately to achieve precision landing.

Landing Protection is active during precision landing. Precision Landing performance is subject to the following conditions:

a) Home point is recorded upon take o, and cannot not be refreshed during ight.

b) Aircraft must take o vertically. Take o altitude must be greater than 7 meters. c) Home point terrain features remain largely unchanged. d) Home point terrain with no distinctive features will aect the performance. e) Lighting conditions cannot be too light nor too dark.

The following actions are available during landing:

a) Pull throttle down to accelerate landing. b) Moving the control sticks in any other direction will stop Precision Landing. The aircraft will descend

vertically and Landing Protection will remain active.

RTH Safety Notices

20m

The aircraft cannot avoid obstruction during RTH when the Forward

Vision System is disabled. Users can use the remote controller to

control aircraft altitude and speed. It is important to set a suitable

Failsafe altitude before each flight. Go to Camera View in DJI GS Pro, tap the text under the Smart RTH button to set an RTH

altitude.

If the aircraft is ying under 65 feet (20 meters) and RTH (including Smart RTH, Low Battery RTH and Failsafe RTH) is triggered, the aircraft will rst automatically ascend to 65 feet (20 meters) from the

current altitude. You can only cancel the ascending by exiting the RTH.

The aircraft will automatically descend and land if RTH is triggered

when the aircraft ies within a 16-feet (5 meters) radius of the Home Point and when the aircraft altitude is under 98 feet (30 meters), or

if the obstacle sensing function is disabled. The aircraft will not as-

cend, and will land immediately at the current location.

P4 Multispectral User Manual

Aircraft cannot return to the Home Point when GNSS signal is weak

( [ ] displays grey) or the module is unavailable.

If you move the throttle stick after the aircraft rises above 65 feet (20

meters) but below the pre-set Failsafe RTH altitude, the aircraft will

stop ascending and immediately return to the Home Point.

Obstacle Avoidance During RTH

Aircraft can now sense and actively attempt to avoid obstacles during RTH, provided that the lighting conditions are adequate for the Forward Vision System. Upon detecting an obstacle, the

aircraft will act as follows:

1. The aircraft will use the primary camera to identify obstacles as far as 984 feet (300 meters) in

front, allowing it to plan a safe route home.

2. The aircraft decelerates when an obstacle is sensed at 49 feet (15 meters) ahead.

3. The aircraft stops and hovers then starts ascending vertically to avoid the obstacle. Eventually,

the aircraft will stop climbing when it is at least 16 feet (5 meters) above the detected obstacle.

4. Failsafe RTH procedure resumes, the aircraft will continue flying to the Home Point at the

current altitude.

300 meters

The Obstacle Sensing function is disabled during RTH descent. Operate with care.

To ensure the aircraft returns home forwards, it cannot rotate during RTH while the Forward Vision System is enabled.

The aircraft cannot avoid obstacles above, beside, or behind the aircraft.

5 meters

15 meters

Landing Protection Function

Landing Protection will activate during auto landing.

1. Landing Protection determines whether the ground is suitable for landing. If so, the aircraft will

land gently.

2. If Landing Protection determines that the ground is not suitable for landing, the aircraft will

hover and wait for pilot confirmation. The aircraft will hover if it detects the ground is not

appropriate for landing even with a critically low battery warning. Only when the battery level

P4 Multispectral User Manual

decreases to 0% will the aircraft land. Users retain control of aircraft ight orientation.

3. If Landing Protection is inactive, DJI GS Pro will display a landing prompt when the aircraft descends below 0.3 meters. Tap to conrm or pull down the control stick for 2 seconds to

land when the environment is appropriate for landing.

Landing Protection will not be active in the following circumstances:

•

a) When the user is controlling the pitch/roll/throttle sticks (Landing ground detection will re-activate

when control sticks are not in use) b) When the positioning system is not fully functional (e.g. drift position error) c) When the Downward Vision System needs re-calibration d) When light conditions are not sucient for the Downward Vision System

• If an obstacle is within 1-meter of the aircraft, the aircraft will descend to 0.3m above the ground

and hover. The aircraft will land upon with user conrmation.

Aerial Photography Missions

Create automated ight missions in DJI GS Pro by planning ight paths and setting parameters. Refer to the DJI GS Pro User Manual for details on flight planning and mission execution.

The following section will guide you on how to set the parameters for both RGB imaging and

multispectral imaging, as well as the storage of the photos.

Camera Settings

Go to Camera View in the app, and tap to enter camera settings.

In , congure RGB imaging settings and multispectral imaging settings.

RGB imaging settings:

Camera View will display an RGB image during conguration.

1. Select between Auto and Manual mode. Users can adjust ISO and shutter values when

Manual mode is selected.

2. Set the exposure value (EV).

Multispectral imaging settings:

Camera View will display a multispectral image showing NDVI in real time during conguration.

In the parameters list, the wavelength for each imaging band and its corresponding gain will be

displayed.

1. Select between Auto and Manual mode. Users can adjust the shutter value when Manual

mode is selected.

2. Set EV.

When multispectral camera is selected in Camera View for a mission, this mission will not capture

•

RGB photos, which are required for 2D multispectral map reconstruction in DJI Terra. It is recommended to select visible camera in Camera View before starting the mission to ensure RGB images are collected for reconstruction in DJI Terra. When conguring parameters for a mission, it is recommended to set the Shooting Angle to Course

•

Aligned to ensure mapping accuracy.

P4 Multispectral User Manual

In , set the capture mode, bands to be stored, and NDVI colormap.

Capture mode: Select between single shot and timed shot.

Bands to be stored:

Choose which spectral band photos to save according to the application.

When conguring visible imaging settings, users can select RGB, BLUE, GREEN, RED, RE, and NIR. When conguring multispectral imaging settings, users can select NDVI, BLUE, GREEN, RED,

RE, and NIR.

Only the photos of the selected bands will be saved. At least one band should be selected.

NDVI colormap:

Set the rendered display color scale in the live view according to the numerical value of the

vegetation index. (available soon)

Photos Storage

Depending on the bands selected, up to 6 photos will be taken and saved every time. The photo

for each band in the group has its own le name. The naming rule is “DJI_XXXY”. XXX refers to the number of the photo group. Y, with a value of 0 to 5, corresponds to dierent imaging bands:

Y 0 1 2 3 4 5 Imaging Band RGB or NDVI BLUE GREEN RED RE NIR

Generating Multispectral Maps

Import the image data into DJI GS Pro or DJI Terra to generate multispectral maps. Refer to their

user manuals for details.

RTK Functions

The P4 Multispectral has a built-in DJI Onboard D-RTK, which provides more accurate data for centimeter-level positioning to improve operation precision when using with the DJI D-RTK 2 High Precision GNSS Mobile Station or Network RTK service. The onboard D-RTK, providing precision

position and speed information combined with optimized algorithms, is more accurate than a

standard compass sensor and functions even with magnetic interference from metal structures,

ensuring stable ight. If the RTK signal is weak and dierential data cannot be transmitted during

a mission, users can read the raw satellite observations* recorded in the microSD card in the

aircraft after the ight, and then use PPK technology to achieve centimeter-level positioning.

* Supported later.

P4 Multispectral User Manual

Using with the DJI D-RTK 2 Mobile Station

1. Go to Mission Page in DJI GS Pro, tap the icon or RTK on top of the screen to go to the RTK settings menu, and then select D-RTK 2 as the RTK data source. Enable the aircraft RTK at the bottom of the menu to ensure the aircraft has access to RTK data.

2. Tap Link. The remote controller will start beeping. Then press the link button on the mobile station.

3. Tap Connect to establish connection with the server. Wait for the RTK icon to display FIX, indicating that the dierential data calculation is completed and the aircraft can use RTK for positioning.

Using with Network RTK Service

The Network RTK service uses the remote controller instead of the base station to connect to an approved Network RTK server to send and receive dierential data. Keep the remote controller

on and the mobile device connected to the internet when using this function.

1. Ensure that the remote controller is connected to the aircraft and the mobile device has

access to the Internet.

2. Go to Mission Page in DJI GS Pro, tap the icon or RTK on top of the screen to go to the RTK settings menu, and then select Network RTK Account as the RTK data source.

3. Tap New in the Network RTK Account setting page. After configuration, go back to the

settings menu to select the added account.

4. Enable the aircraft RTK at the bottom of the menu to ensure the aircraft has access to RTK data.

5. Tap Connect to establish connection with the server. Wait for the RTK icon to display FIX, indicating that the differential data calculation is completed and the aircraft can use RTK for

positioning.

Vision System and Infrared Sensing System

The main components of the Vision System are located on the front, rear and bottom of the aircraft, including [1] [2] [4] three stereo vision sensors and [3] two ultrasonic sensors. The Vision

System uses ultrasound and image data to help the aircraft maintain its current position, enabling

precision hovering indoors or in environments where a GNSS signal is not available. The Vision

System constantly scans for obstacles, allowing the aircraft to avoid them by going over, around,

or hovering.

The Infrared Sensing System consists [5] of two 3D infrared modules on both sides of the aircraft.

These scan for obstacles on both sides of the aircraft and is active in certain ight modes.

[5]

[1]

[2] [3]

[4]

P4 Multispectral User Manual

Detection Range

The detection range of the Vision System and Infrared Sensing System are depicted as follow. Note

that the aircraft cannot sense and avoid the obstacles that are not within the detection range.

0.7m

13.1cm

6.8m 7m

0.7m

In P-mode, both the forward and the rear Vision Systems work if the speed is within 13mph (22kph). At higher speeds, only the vision system facing the direction of travel is active.

6.8m 7m

Calibrating Sensors

Vision Systems cameras installed on the aircraft are calibrated on delivery. However these cameras are vulnerable to excessive impact and will require occasional calibration via DJI Assistant 2 for Phantom. Follow the steps below to calibrate the sensors.

Align the boxes

Pan and tilt the aircraft

Using Vision Positioning

Vision Positioning is activated automatically when the aircraft is turned on. No further action is required. Vision Positioning is typically used in indoor environments, where GNSS is unavailable. Using the sensors that are built into the Vision System, the aircraft can hover precisely even without GNSS. The Downward Vision System works best when the aircraft is at altitudes of under 33 ft (10 m). Operate the aircraft with great caution when ying at high speeds at low altitudes

(under 0.5 m).

P4 Multispectral User Manual

Follow the steps below to use Vision Positioning:

1. Turn on the aircraft. The aircraft status indicator will ash green two times, which indicates the Vision Positioning is ready.

2. Gently push the left stick up to lift o and the aircraft will hover in place.

Assisted Braking from Obstacle Sensing

are detected around the aircraft. Note that Obstacle Sensing function works best when lighting

is adequate and the obstacle is clearly marked or textured. The aircraft must y at no more than 31mph (50kph) to allow sucient braking distance.

The 3D Infrared Sensing System is only active in Beginner mode* and Tripod mode*. Fly with caution.

The performance of your Vision System and Infrared Sensing System are aected by the surface

being own over. Ultrasonic sensors may not be able to accurately measure distances when

operating above sound-absorbing materials and the camera may not function correctly in suboptimal

environments. The aircraft will switch from P-mode to A-mode automatically if neither vision sensors

nor ultrasonic sensors and Infrared Sensing System are available. Operate the aircraft with great caution in the following situations:

a) Flying over monochrome surfaces (e.g. pure black, pure white, pure red, pure green).

b) Flying over a highly reective surfaces.

c) Flying at high speeds of over 31mph (50kph) at 2 meters or over 11mph (18kph) at 1 meter. d) Flying over water or transparent surfaces. e) Flying over moving surfaces or objects.

f) Flying in an area where the lighting changes frequently or drastically. g) Flying over extremely dark (lux < 10) or bright (lux > 100,000) surfaces.

h) Flying over surfaces that can absorb sound waves (e.g. thick carpet). i) Flying over surfaces without clear patterns or texture. j) Flying over surfaces with identical repeating patterns or textures (e.g. tiling).

k) Flying over inclined surfaces that will deect sound waves away from the aircraft. l) Flying over obstacles with too small eective infrared reective surface.

m) DO NOT position the sides of two aircraft toward each other to avoid interference between the

3D infrared modules.

n) DO NOT cover the protective glass of the infrared module. Keep it clean and undamaged.

o) Flying at high speed at low altitude (under 0.5 m).

Keep sensors clean at all times. Dirt or other debris may adversely aect their eectiveness. Vision Positioning is only eective when the aircraft is at altitudes of 0.3 to 10 meters. The Vision Positioning may not function properly when the aircraft is ying over water. The Vision System may not be able to recognize pattern on the ground in low light conditions (less

than 100 lux).

Do not use other ultrasonic devices with frequency of 40 kHz when Vision System is in operation.

* This mode will be supported later.

P4 Multispectral User Manual

Flight Recorder

Flight data is automatically recorded to the internal storage of the aircraft. To access this data,

connect the aircraft to the PC through the Micro USB port and launch the DJI Assistant 2.

Attaching and Detaching the Propellers

Use only DJI approved propellers with your aircraft. The grey and black ring on the propeller indi-

cate where they should be attached and in which direction whey should spin.

Propellers Silver Ring Black Ring

Figure

Attach On Motors without black dots Motors with black dots

Lock : Turn the propellers in the indicated direction to mount and tighten.

Legends

Attaching the Propellers

1. Be sure to remove the warning stickers from the motors before attaching the propellers.

2. Mount the propellers with black propeller rings to the motors with black dots. Mount the

propellers with sliver propeller rings to the motors without black dots. Press the propeller down

onto the mounting plate and rotate in the lock direction until it is secured in its position.

Unlock : Turn the propellers in the indicated direction to loosen and

remove.

Detaching the Propellers

Press the propellers down into the motor mount and rotate in the unlock direction.

Be aware of the sharp edges of the propellers. Handle with care. Use only the DJI approved propellers. Do not mix propeller types.

Check that the propellers and motors are installed correctly and rmly before every ight. Ensure that all propellers are in good condition before each ight. DO NOT use aged, chipped, or

broken propellers.

To avoid injury, STAND CLEAR of and DO NOT touch propellers or motors when they are spinning. ONLY use original DJI propellers for a better and safer ight experience.

P4 Multispectral User Manual

DJI Intelligent Flight Battery

The DJI Intelligent Flight Battery has a capacity of 5870 mAh, a voltage of 15.2 V, and a smart charge/discharge functionality. It should only be charged using an appropriate DJI approved

power adapter and charging hub.

Intelligent Flight Battery AC Power Adapter Charging Hub

The Intelligent Flight Battery must be fully charged before using it for the rst time.

Never insert or remove the battery when it is turned on.

Ensure the battery is mounted rmly. The aircraft will not take o if the battery is mounted incorrectly.

DJI Intelligent Flight Battery Functions

1. Battery Level Display: The LED indicators display the current battery level.

2. Auto-Discharging Function: To prevent swelling, the battery automatically discharges to

below 65% of total power when it is idle for more than ten days. It takes around two days to

discharge the battery to 65%. It is normal to feel moderate heat being emitted from the battery

during the discharge process.

3. Balanced Charging: Automatically balances the voltage of each battery cell when charging.

4. Overcharge Protection: Charging automatically stops when the battery is fully charged.

5. Temperature Detection: The battery will only charge when the temperature is between 5°C

(41°F) and 40°C (104°F).

6. Over Current Protection: The battery stops charging when a high amperage (more than 8 A) is

detected.

7. Over Discharge Protection: To prevent over-discharge damage, discharging automatically stops when the battery voltage reaches 12 V.

8. Short Circuit Protection: Automatically cuts the power supply when a short circuit is detected.

9. Battery Cell Damage Protection: DJI GS Pro displays a warning message when a damaged

battery cell is detected.

10. Sleep Mode: To save power, the battery enter sleep mode after 20 minutes of inactivity.

11. Communication: Information pertaining to the battery’s voltage, capacity, current, etc. is

transmitted to the aircraft’s main controller.

Refer to Phantom 4 Series Intelligent Flight Battery Safety Guidelines before use. Users

take full responsibility for all operations and usage.

P4 Multispectral User Manual

Using the Battery

LED1

LED2

LED3

LED4

Power Button (Built-in LED)

Battery Level Indicators

Turning ON/OFF

Turning On: Press the Power Button once, then press again and hold for 2 seconds to turn on.

The Power LED will turn green and the Battery Level Indicators will display the current

battery level.

Turning

Press the Power Button once, then press again and hold for 2 seconds to turn o. The

Off:

battery power LED will flash when powering off the Phantom to allow automatically

stopping of a recording during the event recording wasn’t stopped.

Low Temperature Notice:

1. Battery capacity is signicantly reduced when ying in low temperature (< 0°C) environments.

2. It is not recommended that the battery be used in extremely low temperature (< -10°C)

environments. Battery voltage should reach the appropriate level when operating environment

with temperatures between -10°C and 5°C.

3. End the flight as soon as DJI GS Pro displays the “Low Battery Level Warning” in low

temperature environments.

4. Keep the battery indoors to warm it before ying in low temperature environments.

5. To ensure optimal performance of the battery, keep the battery temperature above 20°C.

6. The charger will stop charging the battery if the battery cell’s temperature is not within the

operating range (0°C ~ 40°C ).

In cold environments, insert the battery into the battery compartment and turn on the aircraft for

approximately 1-2 minutes to warm up before taking o.

P4 Multispectral User Manual

Checking the Battery Level

The Battery Level Indicators display how much power remains. When the battery is turned o, press the Power Button once. The Battery Level Indicators will light up to display the current

battery level. See below for details.

The Battery Level Indicators will also show the current battery level during charging and discharging. The indicators are dened below.

: LED is on. : LED is ashing.

: LED is o.

Battery Level Indicators

LED1 LED2 LED3 LED4 Battery Level

87.5%~100%

75%~87.5%

62.5%~75%

50%~62.5%

37.5%~50%

25%~37.5%

12.5%~25%

0%~12.5%

=0%

Charging the Intelligent Flight Battery

Air cool the Intelligent Flight Battery after each ight. Allow its temperature to drop to room

temperature before charging.

The charging temperature range is 5° to 40° C. The battery management system will stop the battery

from charging when the battery cell temperature is out of range.

Always turn o the battery before inserting it or removing it from the aircraft. Never insert or remove a

battery when it is turned on.

Using only the Power Adapter for Charging

1. Connect the AC power adapter to a power source (100-240 V 50/60 Hz).

2. Connect the Intelligent Flight Battery to the power adapter to start charging. If the battery level

is above 95%, turn on the battery before charging.

3. The Battery Level Indicator will display the current battery level as it is charging.

4. The Intelligent Flight Battery is fully charged when the Battery Level Indicators are all o.

Power Outlet

AC Power Adapter

Intelligent Flight Battery

P4 Multispectral User Manual

Battery Level Indicators While Charging

LED1 LED2 LED3 LED4 Battery Level

0%~25%

25%~50%

50%~75%

75%~100%

Fully Charged

Using the Power Adapter and Charging Hub for Charging

1. Connecting to a Power Source

Connect the power adapter to a power outlet (100-240V, 50/60Hz), then connect the charging

bub to the power adapter.

Charging Hub

AC Power Adapter

Power Outle

2. Connecting Batteries

Charging Mode:

Align the grooves on the Intelligent Flight Battery with the battery slot tracks to insert the

battery and begin charging. The Intelligent Flight Battery with the highest power level will be

charged rst. Other batteries will be charged in sequence according to their power levels.

If the Status LED Indicator of the charging hub is solid green and the LED lights on the Intelligent Flight Battery turn o, charging is complete and the Intelligent Flight Battery can be

disconnected from the charging hub.

Storage Mode:

The charging hub will discharge batteries with more than 50% power to reduce the charge to

50%. Meanwhile batteries with less than 50% charge will be charged to 50%.

Battery Slot Track

P4 Multispectral User Manual

Be sure to align the grooves on the Intelligent Flight Battery with the battery slot tracks. The Status

LED Indicator will turn solid yellow if the battery is properly inserted.

In storage mode, you can power on the Intelligent Flight Batteries to discharge them without having to connect to a power source if all batteries have more than 50% power.

Status LED Indicator Description

Charging Mode

—

Solid Yellow

......

Blinking Green

—

Solid Green

—

Solid Red

......

All Blinking Red

Storage Mode

—

Solid Yellow

......

Blinking Blue

—

Solid Blue

—

Solid Red

......

All Blinking Red

Queuing to charge

Charging

Fully charged

No battery detected

Power supply error, please check the connection to the Battery Charger

Ready to charge or discharge

Charging or discharging

The battery’s power level is 50%

No battery detected

Power supply error, please check the connection to the Battery Charger

Battery Protection LED Display

The table below shows battery protection mechanisms and corresponding LED patterns.

Battery Level Indicators while Charging

LED1 LED2 LED3 LED4 Blinking Pattern Battery Protection Item

LED2 blinks twice per second Over current detected

LED2 blinks three times per

second

Short circuit detected

LED3 blinks twice per second Over charge detected

LED3 blinks three times per

second

LED4 blinks twice per second

LED4 blinks three times per

second

Over-voltage charger detected

Charging temperature is too

low

Charging temperature is too

high

After these issues are resolved, press the Power Button to turn o the Battery Level Indicator.

Unplug the Intelligent Flight Battery from the charger and plug it back in to resume charging. Note

that you do not need to unplug and plug in the charger in the event of a room temperature error;

the charger will resume charging when the temperature is within the allowable range.

P4 Multispectral User Manual

DJI does not take any responsibility for damage caused by third-party chargers.

If the battery level is above 95%, turn on the battery before charging.

How to discharge your Intelligent Flight Battery:

Place the Intelligent Flight Battery into the battery compartment and turn it on. Fly the aircraft out

doors until the battery level is low (such as 20% of power left).

Gimbal Cameras

This section provides the technical

specications of the cameras and

explains the gimbal operation.

Gimbal Cameras

Cameras

Prole

The P4 Multispectral imaging system contains six cameras with 1/2.9-inch CMOS sensors, including an RGB camera that produces images in the JPEG format and a multispectral camera

array containing five cameras that produce multispectral images in the TIFF format. It uses a

global shutter to ensure performance.

The ve cameras in the multispectral camera array can capture photos in the following imaging bands:

Blue (B): 450 nm ± 16 nm; Green (G): 560 nm ± 16 nm; Red (R): 650 nm ± 16 nm; Red edge (RE):

730 nm ± 16 nm; Near-infrared (NIR): 840 nm ± 26 nm.

Camera microSD Card Slot

The P4 Multispectral supports microSD cards up to 128 GB. A Class 10 or UHS-I and above

microSD card is recommended due to their fast read and write speeds. Users can read the

photos and videos, and the raw satellite observations recorded during missions from the

microSD card.

Do not remove the microSD card from the aircraft when it is shooting.

To ensure the stability of the camera system, single video recordings are capped at 30

minutes.

Micro USB Port

Turn on the aircraft and connect a Micro USB cable to the Micro USB Port to update rmware,

read the photos and videos, and the raw satellite observations recorded during missions.

P4 Multispectral User Manual

Camera Operation

Use the shutter and video recording buttons on the remote controller or in DJI GS Pro to shoot

the photos or videos.

Gimbal

Prole

The 3-axis gimbal provides a steady platform for the attached camera, allowing you to capture

clear, stable images and video. Turn the dial to adjust the gimbal pitch angle.

The controllable range of the pitch angle is -90° to +30°. The range is -90° to 0° when conguring parameters for a mission in DJI GS Pro, but the gimbal can be controlled manually to +30° using

the gimbal dial.

+30°

0°

-90°

A gimbal motor error may occur in these situations:

(1) the aircraft is placed on uneven ground or the gimbal’s motion is obstructed.

(2) the gimbal has been subjected to an excessive external force, such as a collision. Please take o

from at, open ground and protect the gimbal at all times.

Flying in heavy fog or clouds may make the gimbal wet, leading to temporary failure. The gimbal will

recover full functionality after it dries.

It is normal for the gimbal to produce a short beeping tone upon initialization.

Remote Controller

This section describes the features of the remote controller and includes instructions for controlling the aircraft and cameras.

Remote Controller

Profile

The remote controller features DJI’s long-range transmission technology OcuSync that is

capable of controlling the aircraft and the gimbal cameras at a maximum transmission range of

4.3 mi (7 km). Connect an iPad to the remote controller via the USB port to use DJI GS Pro app

to plan and perform missions. Export the captured images for analysis and create multispectral

maps.

Compliance Version: The remote controller is compliant with local compliance and regulations. Operating Mode: Control can be set to Mode 1 or Mode 2, or to a custom mode. Mode 1: The right stick serves as the throttle. Mode 2: The left stick serves as the throttle.

To prevent transmission interference, do not operate more than three aircrafts in the same area.

Using the Remote Controller

Turning the Remote Controller On and O

The P4 Multispectral remote controller is powered by a 2S rechargeable battery that has a capacity of 6000 mAh. The battery level is indicated via the Battery Level LEDs on the front panel. Follow

the steps below to turn on your remote controller:

1. When the remote controller is turned off, press the Power Button once. The Battery Level LEDs will display the current battery level.

2. Press and hold the Power Button to turn on the remote controller.

3. The remote controller will beep when it is turned on. The Status LED will rapidly blink green, indicating that the remote controller is linking to the aircraft. The Status LEDs will glow solid

green when linking is complete.

4. Repeat Step 2 to turn o the remote controller.

P4 Multispectral User Manual

Charging the Remote Controller

Charge the remote controller using the included charger. Refer to the figure below for more

details.

Power Outlet

Charger

Controlling the Camera

Shoot videos/photos, and adjust gimbal pitch angle via the Shutter Button, Video Recording

Button, and Gimbal Dial on the remote controller.

1. Gimbal Dial

Control the tilt of the gimbal. Turn left to tilt the gimbal upward and right to tilt the gimbal

downward.

2. Video Recording Button

Press once to start recording video, then press again to stop recording.

3. Shutter Button

Press to take a photo. Two-stage button. Pictures will only be taken when the shutter button is

fully pressed.

P4 Multispectral User Manual

Controlling the Aircraft

This section explains how to control the orientation of the aircraft through the remote controller.

Control can be set to Mode 1 , Mode 2 or Mode 3, or to a custom mode.

Mode 1

Left Stick

Forward

Right Stick

Mode 2

Mode 3

Backward

Turn RightTurn Left

Right StickLeft Stick

Down

Turn RightTurn Left

Left Stick Right Stick

Forward

Backward

Down

RightLeft

Forward

Backward

RightLeft

Down

RightLeft

The remote controller is set to Mode 2 by default.

Stick Neutral/Mid-Point: Control sticks are in the center position.

Moving the Control Stick: The control stick is pushed away from the center position.

Turn RightTurn Left

P4 Multispectral User Manual

Remote

Controller

(Mode 2)

Aircraft

( Indicates Nose

Direction)

Remarks

Moving the left stick up and down changes the

aircraft’s elevation.

Push the stick up to ascend and down to descend.

When both sticks are centered, the P4 Multispectral

will hover in place.

The more the stick is pushed away from the center

position, the faster the P4 Multispectral will change elevation. Always push the stick gently to prevent

sudden and unexpected elevation changes.

Moving the left stick to the left or right controls the

rudder and rotation of the aircraft.

Push the stick left to rotate the aircraft counter-

clockwise, push the stick right to rotate the

aircraft clockwise. If the stick is centered, the P4

Multispectral will maintain its current orientation.

The more the stick is pushed away from the center

position, the faster the P4 Multispectral will rotate.

Moving the right stick up and down changes the

aircraft’s forward and backward pitch.

Push the stick up to fly forward and down to fly backward. P4 Multispectral will hover in place if the

stick is centered.

Push the stick further away from the center position for a larger pitch angle (maximum 30˚) and faster ight.

Moving the right stick control left and right changes

the aircraft’s left and right pitch.

Push left to fly left and right to fly right. The P4

Multispectral will hover in place if the stick is

centered.

Adjusting Controller Sticks

Hold and twist the controller sticks clockwise or counter clockwise to

adjust the length of the controller sticks. A proper length of controller

sticks can improve the controlling accuracy.

P4 Multispectral User Manual

Flight Mode Switch

Toggle the switch to select the desired ight mode. Choose between P-mode and A-mode.

Position Figure Flight Mode

Position 1 P-mode

Position 2 P-mode

Position 1

Position 2

Position 3 A-mode

Position 3

RTH Button

Press and hold the RTH button to start the Return to Home (RTH) procedure. The LED ring

around the RTH Button will blink white to indicate that the aircraft is entering RTH mode. The

aircraft will then return to the last recorded Home Point. Press this button again to cancel the

RTH procedure and regain control of the aircraft.

Optimal Transmission Range

The transmission signal between the aircraft and the remote controller is most reliable within the

area that depicted below:

Optimal Transmission Rangestrong weak

Ensure that the aircraft is flying within the optimal transmission zone. To achieve the best

transmission performance, maintain the appropriate relationship between the operator and the

aircraft.

P4 Multispectral User Manual

Remote Controller Status LED

The Status LED reects the strength of the connection between the remote controller and the aircraft. The RTH LED indicates the RTH status of the aircraft. The table below contains more

information about these indicators.

RTH LED

Status LED

Status LED Alarm Remote Controller Status

— Solid Red Chime

— Solid Green Chime The remote controller is connected to the aircraft.

Slow Blinking

Red

Red and Green/ Red and

......

D-D-D

None HD downlink is disrupted.

Yellow Alternate Blinks

RTH LED Sound Remote Controller Status

— Solid White Chime Aircraft is returning home.

Blinking White D

Blinking White DD

. . .

.. .. ..

The remote controller is disconnected from the

aircraft.

Remote controller error.

Sending Return-to-Home command to the aircraft.

Return-to-Home procedure in progress.

The Remote Controller Status Indicator will blink red and sound an alert, when the battery level is

critically low.

Linking the Remote Controller

The remote controller should already be linked to the aircraft out of the box. Linking is only required when using a new remote controller for the rst time.

1. Power on the remote controller, connect the mobile device, and open DJI GS Pro.

2. Power on the aircraft.

3. In Mission Page, tap , and then tap Start Linking to the right of the Remote Controller Link

section.

4. The Status LED blinks blue and the remote controller sounds double beep repeatedly,

indicating that the remote controller is ready for linking.

5. Press the link button on the aircraft. Then release and wait for a few seconds. The status LED

will glow solid green if linking is successful.

Flight

This section describes safe ight practices and ight restrictions.

Flight

Once the pre-ight preparation is complete, it is recommended to hone your ight skills through training and practice ying safely. The altitude limit is 1, 640 feet (500 meters). Avoid ying at any altitudes higher. It is important to understand basic ight guidelines for the safety of both you and

those around you. Refer to the disclaimer and safety guidelines for more information.

Flight Environment Requirements

1. Do not use the aircraft in severe weather conditions. These include wind speeds exceeding 10

m/s, snow, rain and fog.

2. Only y in open areas. Tall structures and large metal structures may aect the accuracy of the

on-board compass and GNSS system.

3. Avoid obstacles, crowds, high voltage power lines, trees, and bodies of water.

4. Minimize interference by avoiding areas with high levels of electromagnetism, including base

stations and radio transmission towers.

5. Aircraft and battery performance is subject to environmental factors such as air density and temperature. Be very careful when ying at altitudes greater than 19, 685 feet (6000 meters) above sea level, as the performance of the battery and aircraft may be aected.

6. In the Earth’s polar regions the aircraft can only operate in Attitude mode or using vision

positioning.

GEO (Geospatial Environment Online) System

Introduction

DJI’s Geospatial Environment Online (GEO) System is a global information system committed to providing real-time airspace information within the scope of international laws and regulations. GEO provides flight information, flight times and location information to assist Unmanned Aerial Vehicle (UAV) users in making the best decisions related to their personal UAV use. It also includes

a unique Regional Flight Restrictions feature which provides real-time ight safety and restriction updates and blocks UAVs from ying in restricted airspace. While safety and obeying air trafc

control laws is a paramount concern, DJI recognizes the need for exceptions to be made under special circumstances. To meet this need, GEO also includes an Unlocking feature that enables users to unlock flights within restricted areas. Prior to making their flight, users must submit an unlock request based on the current level of restrictions in their area.

GEO Zones

DJI’s GEO System designates safe flight locations, provides risk levels and safety concerns for

individual ights, and offers restricted airspace information, which can be viewed by users in real

time on DJI GS Pro. The locations designated by GEO are called GEO Zones. GEO Zones are specific flight areas that are categorized by flight regulations and restrictions. GEO Zones that

prohibit ight are implemented around locations such as airports, power plants, and prisons. They can also be temporarily implemented around major stadium events, forest res, or other emergency

situations. Certain GEO Zones do not prohibit flight but do trigger warnings informing users of

potential risks. All restricted ight areas are referred to as GEO Zones, and are further divided into

P4 Multispectral User Manual

Warning Zones, Enhanced Warning Zones, Authorization Zones, Altitude Zones, and Restricted Zones. By default, GEO limits flights into or taking off within zones that may result in safety or security concerns. There is a GEO Zone Map, which contains comprehensive global GEO Zone

information on the ofcial DJI website: https://www.dji.com/ysafe.

The GEO System is for advisory purposes only. Individual users are responsible for checking ofcial sources and determining which laws or regulations may apply to their ight. In some instances,

DJI has selected widely-recommended general parameters (such as a 1.5-mile radius at airports) without making any determination as to whether these guidelines match regulations that apply to

specic users.

GEO Zone Denitions

Warning Zones: Enhanced Warning Zones:

are required to submit an unlock request to y in the zone, for which they must conrm their ight

path.

Authorization Zones:

Authorization Zones can be unlocked by authorized users with a DJI-verified account. SelfUnlocking privileges must be applied for online.

Altitude Zones: Restricted Zones:

obtained permission to y in a Restricted Zone, please go to https://www.dji.com/ysafe or contact ysafe@dji.com to unlock the zone.

DJI GEO Zones aim to ensure the user’s flight safety, but it cannot be guaranteed to be in full compliance with local laws and regulations. Users should check local laws, regulations, and

regulatory requirements before each ight and are responsible for the ight safety.

Users receive a warning message with information relevant to their ight.

Users receive a prompt from the GEO System at the time of ight. They

Users receive a warning message and the flight is prohibited by default.

Flights are limited to a specic altitude.

Flights are completely prohibited. UAVs cannot y in these zones. If you have

All intelligent ight features will be affected when DJI aircraft y nearby or into GEO Zones. Such interference includes, but is not limited to, decreased speed, takeoff failure, and ight termination.

Flight Restrictions

Introduction

UAV operators should abide by all ight regulations established by the relevant government and regulatory agencies, including the ICAO and the FAA. For safety reasons, ights are restricted by

default, which helps users operate DJI products safely and legally.

When Global Navigation Satellite Service (GNSS) is available, GEO Zones are taken into account to

ensure ight safety.

P4 Multispectral User Manual

GEO Zone Flight Restrictions

GEO Zone Description

Takeoff: The aircraft’s motors cannot be started.

In-ight: When GNSS signal changes from weak to strong, DJI GS RTK

starts a 20-second countdown. Once the countdown is over, the aircraft

Restricted Zone

Authorization Zone

Enhanced Warning Zone

Warning Zone The aircraft ies normally but the user receives warning messages.

Altitude Zone

Free Zone The aircraft ies normally with no restrictions.

immediately lands in semi-automatic descent mode and turns off its motors after landing.

In-ight: When the aircraft approaches the boundary of the Restricted

Zone, it automatically decelerates and hovers.

Takeoff: The aircraft’s motors cannot be started. Takeoff is only available after submitting an unlock request with the user’s phone number.

In-ight: When GNSS signal changes from weak to strong, DJI GS RTK

starts a 20-second countdown. Once the countdown is over, the aircraft immediately lands in semi-automatic descent mode and turns off its motors after landing.

The aircraft ies normally but the user is required to conrm the ight

path.

When GNSS signal is strong, the aircraft cannot exceed the specied

altitude.

In-ight: When GNSS signal changes from weak to strong, the aircraft

will descend and hover below the altitude limit.

When the GNSS signal is strong, the aircraft approaches the boundary of the Altitude Zone. If it is higher than the altitude limit, the aircraft decelerates and hovers in place.

When the GNSS signal changes from weak to strong, DJI GS Pro starts a 20-second countdown. Once the countdown is over, the aircraft will descend and hover below the altitude limit.

GEO Unlocking

Due to differing laws and regulations between countries and regions, and differing ight restrictions

between GEO Zones, DJI provides users with two methods for unlocking GEO Zones: Self-Unlocking and Custom Unlocking. Self-Unlocking is used for Authorization Zones, where the user is required to submit an unlock request by authenticating their phone number for a registered DJI account. This feature is only available in certain countries. Users can choose whether to submit their unlock request via the

website at https://www.dji.com/ysafe (Scheduled Self-Unlocking), or through DJI GS Pro (Live Self-

Unlocking).

Custom Unlocking is based on special requirements for individual users. It sets a special ight area that users can unlock by providing ight permission les according to their specic GEO

P4 Multispectral User Manual

Zone and other requirements. It is available in all countries and can be applied for on the website:

https://www.dji.com/ysafe.

For more information about unlocking, please visit https://www.dji.com/ysafe or contact ysafe@

dji.com.

Preflight Checklist

1. Remote controller, Intelligent Flight Battery are fully charged.

2. Propellers are mounted correctly and rmly.

3. MicroSD card has been inserted.

4. Gimbal and camera are functioning normally.

5. Motors can start and are functioning normally.

6. DJI GS Pro is successfully connected to the aircraft.

7. Ensure that the sensors for the Vision System and Infrared Sensing System are clean.

Calibrating the Compass

Only calibrate the compass when DJI GS Pro or the status indicator prompt you to do so.

Observe the following rules when calibrating your compass:

DO NOT calibrate your compass where there is a chance of strong magnetic interference, such as

magnetite, parking structures, and steel reinforcements underground.

DO NOT carry ferromagnetic materials with you during calibration such as cellular phones.

DJI GS Pro will prompt you to resolve the compass issue if the compass is aected by strong

interference after calibration is complete. Follow the prompted instructions to resolve the compass issue.

Calibration Procedures

Choose an open area to carry out the following procedures.

1. In Mission Page, tap , Aircraft Settings, , Sensors, then tap Compass Calibration under

the Compass section.

2. Hold the aircraft horizontally and rotate 360 degrees. The Aircraft Status Indicators will display

a solid green light.

3. Hold the aircraft vertically, with nose pointing downward, and rotate it 360 degrees around the

center axis.

P4 Multispectral User Manual

4. Re-calibrate the aircraft if the aircraft status indicators glows blinking red.

If the Aircraft Status Indicator blinks red and yellow after the calibration procedure, move your aircraft

to a dierent location and try again.

DO NOT calibrate the compass near metal objects such as a metal bridge, cars, scaolding.

If the aircraft status indicators are blinking red and yellow alternately after placing the aircraft on the

ground, the compass has detected magnetic interference. Change your location.

Starting/Stopping the Motors

Starting the Motors

A Combination Stick Command (CSC) is used to start the motors. Push both sticks to the bottom

inner or outer corners to start the motors. Once the motors have started spinning, release both

sticks simultaneously.

Stopping the Motors

There are two methods to stop the motors.

Method 1: When the aircraft has landed, push the left stick down , then conduct the same CSC

that was used to start the motors, as described below . Motors will stop immediately. Release

both sticks once motors stop.

Method 2: When the aircraft has landed, push and hold the left stick down. The motors will stop

after three seconds.

P4 Multispectral User Manual

Method 1 Method 2

Stopping Motors Mid-flight

Perform the CSC to stop the motors. It can be enabled in the app. Go to Camera View, tap , Aircraft Settings, , then tap Advanced Settings to enable Stop Motors in Urgency. Only stop motors mid-ight in emergency situations when doing so can reduce the risk of damage or injury.

Flight Test

Takeo/Landing Procedures

1. Place the aircraft in an open, at area with the battery level indicators facing towards you.

2. Turn on the remote controller and then turn on the Intelligent Flight Battery.

3. Launch DJI GS Pro and enter Mission Page.

4. Wait until the Aircraft Status Indicators start to blink green slowly, which indicates that GNSS or RTK is in use. If using RTK, ensure that the RTK function is enabled and that the RTK/ GNSS signal strength icon shows FIX. Then perform CSC to start motors.

5. Push the left stick up slowly to take o.

6. To land, hover over a level surface and gently pull down on the left stick to descend.

7. After landing, hold the left stick at its lowest position until the motors stop.

8. Turn o the Intelligent Flight Battery rst, then the remote controller.

When the Aircraft Status Indicators blink yellow rapidly during ight, the aircraft has entered Failsafe

mode.

A low battery level warning is indicated by the Aircraft Status Indicators blinking red slowly or rapidly during ight.

Watch our video tutorials for more ight information.

P4 Multispectral User Manual

Video Suggestions and Tips

1. Go through the full pre-ight checklist before each ight.

2. Only shoot photos or record videos when ying in P-mode.

3. Always y in good weather conditions and avoid ying in rain or heavy wind.

4. Choose the camera settings that suit your needs. Settings include ISO, exposure values, etc.

5. Perform ight tests to establish ight routes and preview scenes.

6. Push the control sticks gently to keep the aircraft’s movement smooth and stable.

It is important to understand basic ight guidelines, for the safety of both you and

those around you. Do not forget to read the disclaimer and safety guidelines.

DJI Assistant 2 for Phantom

This section introduces the usage of the DJI Assistant 2 for Phantom software.

DJI Assistant 2 for Phantom

Update rmware, copy ight records and calibrate the Vision System in the DJI Assistant 2 for Phantom software. For users that own DJI Agras aircraft, the DJI Assistant 2 for MG can also be

used for the functions above.

Installation and Launching

1. Download the software installation le from the P4 Multispectral download page:

https://www.dji.com/p4-multispectral/downloads

2. Install the software.

3. Launch DJI Assistant 2 for Phantom.

Using DJI Assistant 2 for Phantom

Connecting the Aircraft

Connect the Micro USB port of the aircraft to your computer with a Micro USB cable. Then power

on the aircraft.

Be sure to remove the propellers before using DJI Assistant 2 for Phantom.

Firmware Update

A DJI account is required for rmware updates. Login with your DJI account or register for one.

Data Upload

Save the ight data recorded by the ight controller or the system logs to a local path or upload them.

Flight Data

Click Open Data Viewer to view ight data. Data Viewer is used to view and analyze the ight data les of the aircraft for performance analysis and troubleshooting.

Calibration

Calibrate the Vision System here when the app prompts for calibration.

Connecting the Remote Controller

Connect the Micro USB port of the remote controller to your computer with a Micro USB cable.

Then power on the remote controller.

Firmware Update

A DJI account is required for rmware updates. Login with your DJI account or register for one.

DO NOT power o the remote controller during the update.

DO NOT perform the rmware update while the aircraft is in the air. Only carry out the rmware

update when the aircraft is on the ground.

The remote controller may become unlinked from the aircraft after the rmware update. Relink the

remote controller and aircraft if necessary.

Appendix

Specifications

Aircraft

Takeo Weight 1487 g

Diagonal Distance (Propellers Excluded) 350 mm

Max Service Ceiling Above Sea Level 19685 ft (6000 m)

Max Ascent Speed 6 m/s (automatic ight); 5 m/s (manual control)

Max Descent Speed 3 m/s

Max Speed 31 mph (50 kph) (P-mode); 36 mph (58 kph) (A-mode)

Max Flight Time Approx. 27 minutes

Operating Temperature 0° to 40° C (32° to 104° F)

Operating Frequency

Transmission Power (EIRP)

Hover Accuracy Range

Image Position Compensation

GNSS

Single-Frequency High-Sensitivity

GNSS

Multi-Frequency Multi-System HighPrecision RTK GNSS

Mapping Functions

Ground Sample Distance (GSD)

2.4000 GHz to 2.4835 GHz (Europe, Japan, Korea)

5.725 GHz to 5.850 GHz (Other countries/regions)

2.4 GHz: < 20 dBm (CE / MIC / KCC)

5.8 GHz: < 26 dBm (FCC / SRRC / NCC)

RTK enabled and functioning properly: Vertical: ±0.1 m; Horizontal: ±0.1 m

RTK disabled: Vertical: ±0.1 m (with vision positioning); ±0.5 m (with

GNSS positioning) Horizontal: ±0.3 m (with vision positioning); ±1.5 m (with GNSS positioning)

The relative positions of the centers of the six cameras’

CMOS and the phase center of the onboard D-RTK

antenna have been calibrated and are recorded in the

EXIF data of each image.

GPS + BeiDou + Galileo

[2]

Galileo

(other regions)

[2]

(Asia); GPS + GLONASS +

Frequency Used GPS: L1/L2; GLONASS: L1/L2; BeiDou: B1/B2; Galileo

E1/E5

First-Fixed Time: < 50 s Positioning Accuracy: Vertical 1.5 cm + 1 ppm (RMS);

Horizontal 1 cm + 1 ppm (RMS). 1 ppm indicates error with a 1 mm increase over 1 km of movement.

Velocity Accuracy: 0.03 m/s

(H/18.9) cm/pixel, H indicates the aircraft altitude relative to the area mapped (unit: m)

[1]

[2]

P4 Multispectral User Manual

Max operating area of approx. 0.63 km2 for a single ight at an altitude of 180 m, i.e., GSD is approx. 9.52 cm/pixel,

Rate of Data Collection

with a forward overlap rate of 80% and a side overlap

ratio of 60%, during a ight that drains the battery from

100% to 30%.

Gimbal

Controllable Range Pitch: -90° to +30°

Vision System

Velocity Range

≤ 31 mph (50 kph) at 6.6 ft (2 m) above ground with adequate lighting

Altitude Range 0 - 33 ft (0 - 10 m)

Operating Range 0 - 33 ft (0 - 10 m)

Obstacle Sensory Range 2 - 98 ft (0.7 - 30 m)

Operating Environment Surfaces with clear patterns and adequate lighting (> 15 lux)

Infrared Sensing System

Obstacle Sensory Range 0.6 - 23 ft (0.2 - 7 m)

FOV 70°(Horizontal), ±10°(Vertical)

Measuring Frequency 10 Hz

Operating Environment

Surface with diuse reection material, and reectivity >

8% (such as wall, trees, humans, etc.)

Camera

Six 1/2.9” CMOS, including one RGB sensor for visible light

Sensors

imaging and ve monochrome sensors for multispectral

imaging.

Each Sensor: Eective pixels 2.08 MP (2.12 MP in total)

Blue (B): 450 nm ± 16 nm; Green (G): 560 nm ± 16 nm;

Filters

Red (R): 650 nm ± 16 nm; Red edge (RE): 730 nm ± 16 nm; Near-infrared (NIR): 840 nm ± 26 nm

FOV (Field of View): 62.7°

Lenses

Focal Length: 5.74 mm (35 mm format equivalent: 40 mm), autofocus set at ∞ Aperture: f/2.2

RGB Sensor ISO Range 200 - 800

Monochrome Sensor Gain 1 - 8x

Electronic Global Shutter

1/100 - 1/20000 s (visible light imaging); 1/100 - 1/10000 s (multispectral imaging)

Max Image Size 1600×1300 (4:3.25)

Photo Format

JPEG (visible light imaging) + TIFF (multispectral imaging)

Supported File Systems FAT32 (≤ 32 GB); exFAT (> 32 GB)

Supported SD Cards

microSD with a minimum write speed of 15 MB/s.

Max Capacity: 128 GB. Class 10 or UHS-1 rating required

Operating Temperature 0° to 40° C (32° to 104° F)

Remote Controller

Operating Frequency

Transmission Power (EIRP)

2.4000 GHz to 2.4835 GHz (Europe, Japan, Korea)

5.725 GHz to 5.850 GHz (Other countries/regions)

2.4 GHz: < 20 dBm (CE / MIC / KCC)

5.8 GHz: < 26 dBm (FCC / SRRC / NCC)

FCC / NCC: 4.3 mi (7 km);

Max Transmission Distance

CE / MIC / KCC / SRRC: 3.1 mi (5 km)

(Unobstructed, free of interference)

Built-in Battery 6000 mAh LiPo 2S

Operating Current / Voltage 1.2 A @ 7.4 V

Mobile Device Holder Tablets and smartphones

Operating Temperature 0° to 40° C (32° to 104° F)

Intelligent Flight Battery (PH4-5870mAh-15.2V)

Capacity 5870 mAh

Voltage 15.2 V

Battery Type LiPo 4S

Energy 89.2 Wh

Net Weight 468 g

Operating Temperature -10° to 40° C (14° to 104° F)

Charging Temperature 5° to 40° C (41° to 104° F)

Max Charging Power 160 W

Intelligent Flight Battery Charging Hub (P4CH)

Voltage 17.5 V

Operating Temperature 5° to 40° C (41° to 104° F)

AC Power Adapter (PH4C160)

Voltage 17.4 V

Rated Power 160 W

P4 Multispectral User Manual

[1]

[1] To comply with local laws and regulations, this frequency is not available in some countries or regions. [2] Support for Galileo is coming soon.

DJI Support

http://www.dji.com/support

This content is subject to change.

Download the latest version from https://www.dji.com/p4-multispectral

If you have any questions about this document, please contact DJI by sending a message to

is a trademark of DJI.

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DJI P4 MULTISPECTRAL User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Using This Manual

Legend

Before Flight

Video Tutorials

Download DJI GS Pro App

Download DJI Terra

Introduction

Feature Highlights

Preparing the Aircraft

Activating the Aircraft

Aircraft Overview

Remote Controller Overview

Aircraft

Profile

Flight Modes

Aircraft Status Indicators

Return to Home (RTH)

Aerial Photography Missions

RTK Functions

Vision System and Infrared Sensing System

Flight Recorder

Attaching and Detaching the Propellers

DJI Intelligent Flight Battery

Gimbal Cameras

Cameras

Gimbal

Remote Controller

Profile

Using the Remote Controller

Remote Controller Status LED

Linking the Remote Controller

Flight

Flight Environment Requirements

GEO (Geospatial Environment Online) System

Flight Restrictions

GEO Unlocking

Preflight Checklist

Calibrating the Compass

Starting/Stopping the Motors

Stopping Motors Mid-flight

Flight Test

DJI Assistant 2 for Phantom

Installation and Launching

Using DJI Assistant 2 for Phantom

Appendix

Specifications