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This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause
undesired operation.
Copyright Notice
Hemisphere GPS Precision GPS Applications
Copyright © Hemisphere GPS (2011). All rights reserved.
No part of this manual may be reproduced, transmitted, transcribed, stored in a retrieval system or
translated into any language or computer language, in any form or by any means, electronic,
mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written
permission of Hemisphere GPS.
Trademarks
Hemisphere GPS®, the Hemisphere GPS logo, COASTTM, Crescent®, EclipseTM, PocketMAX PCTM,
PocketMAX
trademarks are the properties of their respective owners.
TM
, SBX-4TM, and Vec to rTM are proprietary trademarks of Hemisphere GPS. Other
Patents
Hemisphere GPS products may be covered by one or more of the following U.S. Patents:
6,111,549 6,397,147 6,469,663 6,501,346 6,539,303
6,549,091 6,631,916 6,711,501 6,744,404 6,865,465
6,876,920 7,142,956 7,162,348 7,277,792 7,292,185
7,292,186 7,373,231 7,400,956 7,400,294 7,388,539
7,429,952 7,437,230 7,460,942
Other U.S. and foreign patents pending.
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Contents
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Additional Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
VHF Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mounting Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Mounting Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Serial Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
NMEA 2000 Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Powering the MV102 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connecting to a Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Electrical Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connecting the MV102 to External Devices . . . . . . . . . . . . . . . . . . 12
Power/Data Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Default Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Supplemental Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Common Commands and Messages . . . . . . . . . . . . . . . . . . . . . . . 15
End User License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Warranty Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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Page 5
Overview
This quick reference guide provides information to get you up and running quickly
with your MV102 GPS Compass. For more detailed information on using the MV102
refer to the MV102 GPS Compass User Guide.
This guide consists of the following sections:
• “Parts List” below describes the parts in your MV102 GPS Compass kit
• “Additional Documentation” below provides information for additional
MV102 documentation
• “Installation Considerations” on page 2 contains recommendations for
where to place your MV102, dimensions of the unit, VHF interference, and
mounting options
• “Mounting Orientation” on page 4 describes parallel and perpendicular
orientations
• “Alignment” on page 5 describes how to align the MV102
• “Connecting the MV102 to External Devices” on page 12 provides
information on the included power/data cable and how to connect to serial
ports
• “Configuration” on page 14 lists basic configuration information
• “Supplemental Sensors” on page 14 describes the purpose of and
calibration procedures for the sensors
• “Common Commands and Messages” on page 15 lists commands and
messages common to MV102 (for more information on commands and
messages see the GPS Technical Reference from www.hemispheregps.com)
Parts List
In addition to this Quick Reference Guide (which is included in the MV102 kit),
installing the MV102 GPS Compass requires the following:
• MV102 GPS Compass
• Kit (accessory item) containing the following:
– Power/data cable (15 m)
–Clamp
–Screw
–Washer
• Serial-to-NMEA 2000 adapter, PN 710-0104-000#
Additional Documentation
For more in-depth information on the MV102 GPS Compass you can download the
MV102 User Guide.
MV102 Quick Reference Guide 1
Page 6
Installation Considerations
C
L
C
L
66.90 mm
(2.63”)
SET SCREW
3/8-16 THREAD SIZE
2 PLACES
MOUNTING HOLE
1-14 UNS- 2B THR EAD SIZE
MOUNTING HOLE
1/4-20 UNC-2B THREAD SIZE
4 PLACES
416.93 mm (16.41”)
157.89 mm (6.21”)
46.99 mm
31.75 mm
(1.25”)
(1.85”)
Refer to the MV102 GPS Compass User Guide for more detailed installation
instructions.
Location
Proper location is important to obtain a high-precision GPS reading. Choose an
installation location using either the pole or fixed mount where the MV102:
• Has a clear view of the sky
• Is away from other electronics and antennas
• Has enough cable to reach a power source
• Is on a level plane
Dimensions
The following drawing illustrates the physical dimensions of the MV102.
MV102 Quick Reference Guide 2
Page 7
VHF Interference
1.5 m radius at top
(minimum)
1.0 m radius at base
(minimum)
Use these minimum
distances to determine
where to place the MV102
VHF Antenna
VHF interference from such devices as cellular phones and radio transmitters may
interfere with GPS operation. For example, if installing the MV102 near marine radios
consider the folowing:
• VHF marine radio working frequencies (Channels 1 to 28 and 84 to 88) range
from 156.05 to 157.40 MHz. The L1 GPS working center frequency is 1575.42
MHz. The bandwidth is +/- 2MHz to +/- 10 MHz, which is dependent on the
GPS antenna and receiver design.
• VHF marine radios emit strong harmonics. The 10th harmonic of VHF radio,
in some channels, falls into the GPS working frequency band, which may
cause the SNR of GPS to degrade significantly.
• The radiated harmonic signal strength of different brands/ models varies.
• Follow VHF radio manufacturers’ recommendations on how to mount their
radios and what devices to keep a safe distance away.
• Handheld 5W VHF radios may not provide suitable filtering and may
interfere with the MV102’s operation if too close.
Before installing the MV102 use the following diagram to ensure there are no nearby
devices that my cause VHF interference.
Mounting Options
*Hemisphere GPS does not provide the mounting hardware.
The MV102 allows for two different mounting options: flush mount and pole mount.
• Flush mount - The bottom of the MV102 contains four holes for flush
mounting the unit to a flat surface (see “Dimensions” on page 2).
• Pole mount - The bottom of the MV102 contains a mounting hole (1" thread,
0.9" depth) for easy pole mounting. Hand tighten (do not overtighten). The
set screws on the long sides of the base (see diagram above) allow you to
secure the MV102 in place (3/16" Allen wrench not included).
MV102 Quick Reference Guide 3
Page 8
Mounting Orientation
Forward
motion
Parallel
Orientation
Forward
motion
Recessed arrow
located on
bottom of
enclosure
(recommended orientation and
resulting signs of HPR values)
Recessed arrow
located on
bottom of
enclosure
Perpendicular
Orientation
(alternate orientation and
resulting signs of HPR values)
The MV102 outputs heading, pitch, and roll readings regardless of the orientation of
the antennas. However, the relation of the antennas to the boat’s axis determines
whether you will need to enter a heading, pitch, or roll bias. The primary antenna is
used for positioning and the primary and secondary antennas, working in
conjunction, output heading, pitch, and roll values.
MV102 Quick Reference Guide 4
Page 9
Alignment
The top of the MV102 enclosure incorporates sight design features to help you align
the enclosure with respect to an important feature on your vessel.
To use the sights, center the small post on the opposite side of the enclosure from
you, within the channel made in the medallion located in the center of the enclosure
top as shown in Figure 1 and Figure 2. Alignment accuracy when looking through the
long site (Figure 1) is approximately +/- 1°, while alignment through the short site
(Figure 2) is approximately +/- 2.5°.
Figure 1: Long site alignment
Figure 2: Short sight alignment
MV102 Quick Reference Guide 5
Page 10
Ports
The MV102 offers either serial port or NMEA 2000 port functionality.
Serial Ports
The MV102 offers position and heading data via two full-duplex (bi-directional) RS-232
serial ports. Besides outputting data, these ports are used for firmware upgrades.
Selecting Baud Rates and Message Types
When selecting your baud rate and message types, use the following calculation to
determine your baud rate for your required data throughput.
Messages * Message output rate * Message length (bytes) * bits in byte
Ex: 5 * 20Hz * 40 bytes * 10 = 40,000 bits/sec
For information on message output rates refer to GPS Technical Reference available
from the Hemisphere GPS website at www.hemispheregps.com.
Configuring the Ports
You may configure Port A or Port C of the GPS receiver to output any combination of
data that you want. Port A can have a different configuration from Port C in terms of
data message output, data rates, and the baud rate of the port. This allows you to
configure the ports independently based upon your needs.
The CAN processor that controls Port C is by default programmed into NMEA 2000
mode. You must configure Port C as a serial port to use the MV102 with two serial
ports. Port A is always a serial port. To configure Port C as a serial port refer to Table 1
on page 7.
For example, if you want one generalized port and one heading-only port, you can
configure the ports as follows:
• Port A to have GPGGA, GPVTG, GPGSV, GPZDA, and GPHDT all output at
1 Hz over a 9600 baud rate
• Port C to have GPHDT and GPROT output at their maximum rate of 20 Hz
over a 19200 baud rate
A personal computer (PC) typically uses a DB9-male connector for RS-232 serial port
communications.
Note: For successful communications use the 8-N-1 protocol and set the baud rate of
the MV102’s serial ports to match that of the devices to which they are connected.
Flow control is not supported.
Recommendations for Connecting to Other Devices
When interfacing to other devices, ensure the transmit data output from the MV102 is
connected to the data input of the other device. The signal grounds must also be
connected.
There is likely little reason to connect the receive data input of the MV102 to another
device unless it is able to send configuration commands to the MV102. Since the
MV102 uses proprietary NMEA 0183 commands for control over its configuration, the
vast majority of electronics will not be able to configure its settings unless the other
device has a terminal setting where you can manually issue commands.
MV102 Quick Reference Guide 6
Page 11
NMEA 2000 Port
By default, Port C is configured as a NMEA 2000 port with the default baud rate of
57600.
To use MV102 for NMEA 2000 you have to connect the included serial-to-NMEA 2000
adapter (P/N 710-0104-000#) to the unit. Figure 3 shows the adapter. Insert the 12-pin
connector of the adapter into the male end of the 12-pin connector on the MV102 by
aligning the keys. You can then attach the adapter to the unit using the supplied
screws (machine, 8-32, ½”, PPHC, SS) and washer (washer, flat, #8, SS). The 5-pin male
Micro-C connector connects to your NMEA 2000 drop cable.
Figure 3: Serial-to-NMEA 2000 adapter
Table 1 lists the commands used to configure Port C back to serial or NMEA 2000
when necessary. You can only
send these commands using Port A.
Table 1: Commands for changing Port C (must be sent through Port A)
Command Reply Description
$JRELAY,PORTC,$JSERIALMODE $>JSERIALMODE,ENABLED
$>resetting
$JRELAY,PORTC,$JN2KMODE $>JN2KMODE,ENABLED
$>resetting
Switch Port C to
serial
Switch Port C to
NMEA 2000
Table 2 shows the requested PGNs with the MV102 in NMEA 2000 mode.
Table 2: Received messages based on a request
Default
PG No.
(PGN)
059392 ISO Acknowledgement
Description Level
Used to acknowledge the status of certain
requests addressed to a specific ECU.
BOn
Update
Rate
(msec)
Request
Freq
(Hz)
On
Request
059904 ISO Request
Request the transmission of a specific PGN,
addressed or broadcast.
060928 ISO Address Claim
Used to identify to other ECUs the address
claimed by an ECU.
MV102 Quick Reference Guide 7
BOn
Request
BOn
Request
On
Request
On
Request
Page 12
Table 2: Received messages based on a request (continued)
PG No.
(PGN)
Description Level
Default
Update
Rate
(msec)
Freq
(Hz)
126996 Product Information
NMEA 2000 database version supported,
manufacturer’s product code, NMEA 2000
certification level, Load Equivalency number,
and other product-specific information.
126464 Receive/Transmit PGNs group function
The Transmit / Receive PGN List Group type
of function is defined by first field. The
message will be a Transmit or Receive PGN
List group function.
129538 GNSS Control Status
GNSS common satellite receiver parameter
status.
129545 GNSS RAIM Output
Used to provide the output from a GNSS
receiver's Receiver Autonomous Integrity
Monitoring (RAIM) process. The Integrity
field value is based on the parameters set in
PGN 129546 GNSS RAIM Settings.
129546 GNSS RAIM Settings
Used to report the control parameters for a
GNSS Receiver Autonomous Integrity
Monitoring (RAIM) process.
BOn
Request
BOn
Request
BOn
Request
BOn
Request
BOn
Request
On
Request
On
Request
On
Request
On
Request
On
Request
Table 3 shows the transmitted PGNs with their default update rate with the MV102 in
NMEA 2000 mode.
Table 3: Transmitted messages
PG No.
(PGN)
126992 System Time
Description Level
The purpose of this PGN is twofold: To provide a
regular transmission of UTC time and date. To
provide synchronism for measurement data.
MV102 Quick Reference Guide 8
Default
Update
Rate
(msec)
B10001
Freq
(Hz)
Page 13
Table 3: Transmitted messages (continued)
PG No.
(PGN)
Description Level
Default
Update
Rate
(msec)
Freq
(Hz)
127250 Vessel Heading
Heading sensor value with a flag for True or
Magnetic. If the sensor value is Magnetic, the
deviation field can be used to produce a
Magnetic heading, and the variation field can be
used to correct the Magnetic heading to
produce a True heading.
127251 Rate of Turn
Rate of change of the Heading.
127257 Attitude
Provides a single transmission that describes
the position of a vessel relative to both
horizontal and vertical planes. This would
typically be used for vessel stabilization, vessel
control and onboard platform stabilization.
127258 Magnetic Variation
Message for transmitting variation. The
message contains a sequence number to allow
synchronization of other messages such as
Heading or Course over Ground. The quality of
service and age of service are provided to
enable recipients to determine an appropriate
level of service if multiple transmissions exist.
B10010
B10010
B10001
1000 1
128259 Speed
Provides a single transmission that describes
the motion of a vessel.
129025 Position, Rapid Update
Provides latitude and longitude referenced to
WGS84. Being defined as single frame
message, as opposed to other PGNs that
include latitude and longitude and are defined
as fast or multi-packet, this PGN lends itself to
being transmitted more frequently without
using up excessive bandwidth on the bus for
the benefit of receiving equipment that may
require rapid position updates.
129026 COG & SOG, Rapid Update
Single frame PGN that provides Course Over
Ground (COG) and Speed Over Ground (SOG).
B10001
B10010
B2504
MV102 Quick Reference Guide 9
Page 14
Table 3: Transmitted messages (continued)
PG No.
(PGN)
Description Level
Default
Update
Rate
(msec)
Freq
(Hz)
129027 Position Delta, High Precision Rapid Update
The "Position Delta, High Precision Rapid
Update" Parameter Group is intended for
applications where very high precision and very
fast update rates are needed for position data.
This PGN can provide delta position changes
down to 1 mm with a delta time period accurate
to 5 msec.
129028 Altitude Delta, High Precision Rapid Update
The "Altitude Delta, High Precision Rapid
Update" Parameter Group is intended for
applications where very high precision and very
fast update rates are needed for altitude and
course over ground data. This PG can provide
delta altitude changes down to 1 millimeter, a
change in direction as small as 0.0057°, and
with a delta time period accurate to 5 msec.
129029 GNSS Position Data
Conveys a comprehensive set of Global
Navigation Satellite System (GNSS)
parameters, including position information.
B10010
B10010
B10001
129033 Time & Date
Single transmission that provides UTC time,
UTC Date, and Local Offset.
129539 GNSS DOPs
Provides a single transmission containing
GNSS status and dilution of precision
components (DOP) that indicate the
contribution of satellite geometry to the overall
positioning error. There are three DOP
parameters reported: horizontal (HDOP), Vertical
(VDOP), and time (TDOP).
129540 GNSS Sats in View
GNSS information on current satellites in view
tagged by sequence ID. Information includes
PRN, elevation, azimuth, SNR, defines the
number of satellites; defines the satellite
number and the information.
B10001
B10001
B10001
MV102 Quick Reference Guide 10
Page 15
Powering the MV102
Power Considerations
For best performance use a clean and continuous power supply. The MV102 power
supply features reverse polarity protection but will not operate with reverse polarity.
Additional power specifications include:
• Input voltage: 6 to 36 VDC
• Power consumption: ~ 3 W nominal
• Current consumption: 320 mA @ 9 VDC
240 mA @ 12 VDC
180 mA @ 16 VDC
• Power isolation: Isolated to enclosure
Connecting to a Power Source
Note: This section refers to powering the unit via serial connection. To power the unit
via NMEA 2000 connection, following the standard procedure for powering up via
NMEA 2000.
Before you power up the MV102 you must terminate the wires of the power cable as
required. There are a variety of power connectors and terminals on the market from
which to choose, depending on your specific requirements.
Do not apply a voltage higher than 36 VDC. This will damage the
receiver and void the warranty.
To interface the MV102 power cable to the power source:
• Connect the red wire of the cable’s power input to DC positive (+)
• Connect the black wire of the cable’s power input to DC negative (-)
The MV102’s smart antenna will start when an acceptable voltage is applied to the
power leads of the extension cable.
Electrical Isolation
The MV102’s power supply is isolated from the communication lines and the PC-ABS
plastic enclosure isolates the electronics mechanically from the vessel (addressing the
issue of vessel hull electrolysis).
MV102 Quick Reference Guide 11
Page 16
Connecting the MV102 to External Devices
J1 P1
30 mm
Strip and tin 3 mm
25 mm
100 mm
15 m
Power/Data Cable
The MV102 uses a single 15 m (49 ft) cable for power and data input/output.
The receiver end of the cable is terminated with an environmentally sealed 12-pin
connection; the opposite end is unterminated and requires field stripping and tinning.
Table 4 shows the cable’s pinout specifications.
Table 4: Power/data cable pinout
Pin Function Wire Color
1 Port C, RS-232 female DB9 pin 2, device out White
2 Port C, RS-232 female DB9 pin 3, device in Green
3N/C N/C
4N/C N/C
5 Power input Red
6N/C N/C
7 Signal ground Yellow
8 Port A, RS-232 female DB9 pin 3, device in Brown
9 Port A, RS-232 female DB9 pin 2, device out Blue
10 Power ground Black
11 CH_GND Drain
12 N/C N/C
MV102 Quick Reference Guide 12
Page 17
Default Parameters
Table 5 and Table 6 provide details on the default port settings, available baud rates,
differential age, elevation mask, and default differential mode. Use the $JSAVE
command to save changes you make to the MV102’s configuration for the changes to
be present in subsequent power cycles.
Table 5: Default port settings
Port
Port A (RS-232) 19200 GPGGA, GPVTG, GPGSV, GPZDA, GPHDT,
Port C (RS-232) 19200 GPGGA, GPVTG, GPGSV, GPZDA, GPHDT,
Power RED (+), BLK (-) 6 - 36 VDC
Note: The default update rate for NMEA 0183 messages is 1 Hz. 10 Hz is the standard
maximum rate, but you can purchase a subscription to upgrade the output rate to 20 Hz.
Table 6: Additional default settings
Parameter Specification
Max DGPS age (correction age) 2700 seconds
Elevation mask 5°
Differential mode SBAS (WAAS/EGNOS)
Baud
Rate
NMEA Messages
GPROT
GPROT
Update
Rate
1 Hz
1 Hz
MV102 Quick Reference Guide 13
Page 18
Configuration
Use a terminal program or PocketMax3 (available at www.hemispheregps.com) to
connect to a serial port for additional configuration requirements. Use default baud
rate of 19200 bps and 8-N-1 protocol.
• Change baud rate of either port to match that of the external equipment to
which the MV102 is connected. After changing the baud rate, you must close
the terminal program and reconnect at the speed selected.
• Configure NMEA messages to be output on the appropriate port.
• Select differential source.
• Input heading bias (-180° to +180°) to compensate for any offset from the
centerline.
• Input bias for tilt (-15° to +15°) to compensate for any offset from horizontal.
• Enable/disable supplementary sensors (default is GYROID and TILTAID on).
• Use the $JSAVE command to save the configuration changes when finished.
Supplemental Sensors
A pair of tilt sensors and a gyro are integrated in the MV102. The user can turn either
the tilt sensors or the gyro on or off. However, the system’s performance is optimized
with both the tilt sensors and the gyro on.
Sensor Purpose Calibration Procedure
Gyro
aid
Tilt aid Smooths rate of heading
Feature Normal Operation Coasting (no GPS)
Heading GPS Gyro
Smooth rate of turn:
Provides alternate source
of heading for up to 3 min
when GPS lock is lost
Shortens heading
reacquisition time
Reduces startup and
reacquisition times for
obtaining heading
Will self-calibrate after several minutes
To manually calibrate:
1. After heading is computed
2. Send $JATT,GYROAID,YES
3. Spin Vector for 1 min at less than 15º/sec
4. Leave unit stationary for 4 min
Note: You do not need to recalibrate with
standard use since the gyro selects the calibration.
Precalibrated during manufacture
To recalibrate:
1. Ensure Vector is level
2. Send $JATT,TILTCAL
Heave GPS None
Pitch GPS Inertial sensor
Roll Inertial sensor Inertial sensor
MV102 Quick Reference Guide 14
Page 19
Common Commands and Messages
Note: When selecting your baud rate and message types, use the following
calculation to determine your baud rate for your required data throughput.
Messages * Message output rate * Message length (bytes) * bits in byte
Ex: 5 * 20Hz * 40 bytes * 10 = 40,000 bits/sec
For information on message output rates refer to GPS Technical Reference available
from the Hemisphere GPS website at www.hemispheregps.com.
Table 7: Commands
Command Description
$JAGE Specify maximum DGPS (COAST) correction age (6 to 8100 seconds)
$JAPP Query or specify receiver application firmware
$JASC Specify ASCII messages to output to specific ports
$JBAUD Specify RS-232, RS-422 (output) communication rate
$JBIN Specify binary messages to output to specific ports
$JDIFF Query or specify differential correction mode
$JGEO Query or specify SBAS for current location and SBAS satellites
$JI Query unit’s serial number and firmware versions
$JOFF Turn off all data messages
$JQUERY,GUIDE Query accuracy suitability for navigation
$JRESET Reset unit’s configuration to firmware defaults. $JRESET clears all
parameters. See the MV102 GPS Compass User Guide for more
information.
$JSAVE Save session’s configuration changes
In Table 8 the Info Type value is one of the following: P = Position; V = Velocity, Time; H
= Heading, Attitude; S = Sats, Stats, Quality
Table 8: NMEA 0183 and other messages
Message
$GPDTM P Datum reference Yes
$GPGGA P GPS position and fix data Yes
$GPGLL P Geographic position - lat/long Yes
$GPGNS P GNSS position and fix data Yes
Info
Type
MV102 Quick Reference Guide 15
Description
IEC Approved
Message
Page 20
Table 8: NMEA 0183 and other messages (continued)
Message
Info
Type
Description
IEC Approved
Message
$GPGRS S GNSS range residual (RAIM) Yes
$GPGSA S GNSS DOP and active satellites Yes
$GPGST S GNSS pseudo range error statistics and
Yes
position accuracy
$GPGSV S GNSS satellites in view Yes
*$GPHDG H Provides magnetic deviation and variation
Yes
for calculating magnetic or true heading
*$GPHDM H Magnetic heading (based on GPS-derived
No
heading and magnetic declination)
*$GPHDT H GPS-derived true heading Yes
$GPHEV H Heave value (in meters) Yes
$GPRMC P Recommended minimum specific GNSS data Yes
*$GPROT H GPS-derived rate of turn (ROT) Yes
$GPRRE S Range residual and estimated position error
Yes
message
$GPVTG V COG and ground speed Yes
$GPZDA V Time and date Yes
$PASHR H Time, heading, roll, and pitch data in one
No
message
$PSAT,GBS S Satellite fault detection (RAIM) Yes
$PSAT,HPR H Proprietary NMEA message that provides
No
heading, pitch, roll, and time in single
message
$PSAT,INTLT H Proprietary NMEA message that provides the
Yes
pitch and roll measurements from the
internal inclinometers (in degrees)
$RD1 S SBAS diagnostic information Yes
$TSS1 H Heading, pitch, roll, and heave message in
No
the commonly used TSS1 message format
* You can change the message header for the HDG, HDM, HDT, and ROT messages to
either GP or HE using the $JATT,NMEAHE command. For more information refer to the
Hemisphere GPS Technical Reference available at www.hemispheregps.com.
MV102 Quick Reference Guide 16
Page 21
Table 9: Binary messages
$JBIN
Message
Description
$JBIN
Message
Description
1 GPS position 95 Satellite ephemeris data
2 GPS DOPs 96 Code and carrier phase
80 SBAS 97 Processor statistics
93 SBAS ephemeris data 98 Satellites and almanac
94 Ionosphere and UTC
99 GPS diagnostics
conversion parameters
Table 10: Parameters specific to $JATT command
Parameter Description Query Specify
COGTAU Set/query COG time constant (0.0 to 3600.0 s) X X
CSEP Query antenna separation X
EXACT Enable/disable internal filter reliance on the entered
XX
antenna separation
FLIPBRD Turn the flip feature on/off X X
GYROAID Enable/disable gyro X X
HBIAS Set/query heading bias (-180.0º to 180.0º) X X
HELP Show the available commands for GPS heading
X
operation and status
HIGHMP Set/query the High Multipath setting for use in poor
XX
GPS environments
HRTAU Set/query ROT time constant (0.0 to 3600.0 s) X X
HTAU Set/query heading time constant (0.0 to 3600.0 s) X X
LEVEL Query or enable/disable level operation X X
MSEP Manually set or query antenna separation X X
NEGTILT Query or enable/disable negative tilt X X
NMEAHE Query for the message headers or change the HDG,
XX
HDM, HDT, and ROT message headers between GP
and HE
PBIAS Set/query pitch/roll bias (-15.0º to 15.0º) X X
PTAU Set/query pitch time constant (0.0 to 3600.0 s) X X
ROLL Query or configure for roll or pitch GPS orientation X X
SEARCH Force a new GPS heading search X
MV102 Quick Reference Guide 17
Page 22
Table 10: Parameters specific to $JATT command (continued)
Parameter Description Query Specify
SPDTAU Set/query speed time constant (0.0 to 3600.0 s) X X
SUMMARY Display a summary of the current Crescent Vector
X
settings
TILTAID Query or enable/disable accelerometer, pre-
XX
calibrated
TILTCAL Calibrate accelerometers X
MV102 Quick Reference Guide 18
Page 23
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Page 24
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Page 25
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Page 26
Warranty Notice
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8444 N. 90th Street, Suite 130
Scottsdale, AZ 85258
Phone: 480-348-9919 Fax: 480-348-6370
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