NavCom SF-2050 User Manual Rev.G

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NavCom Technology, Inc.

20780 Madrona Avenue Torrance, California 90503 USA

Tel: [phone]

Fax: [phone]

[e-mail]

www.navcomtech.com

P/N: 96-310002-3001

SF-2050 User Guide – Rev. G

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	SF-2050 User Guide – Rev. G
Table of Contents
List of Figures ..........................................................		iv
List of Tables	............................................................	v
Notices	...........................................................	vi
Copyright ....................................................................		vi
Trademarks ................................................................		vi
FCC Notice ................................................................		vii
User Notice................................................................		vii
Limited Warranty .......................................................		viii
StarFire™ Licensing...................................................		ix
USG FAR....................................................................		ix
Global Positioning System .........................................		ix
Revision History.......................................................		xi
Use of this Document ............................................		xiii
Related Documents .......................................................		xiii
StarUtil User Guide....................................................		xiii
Technical Reference Manual....................................		xiv
RINEXUtil User Guide ..............................................		xiv
Integrators Toolkit.....................................................		xiv
NavCom Release Notes...........................................		xiv
Related Standards .........................................................		xv
ICD-GPS-200 ............................................................		xv
RTCM-SC-104...........................................................		xv
CMR, CMR+ ..............................................................		xv
NMEA-0183 ...............................................................		xv
Publicly-Operated SBAS Signals ..............................		xv
Chapter 1	Introduction .....................................	17
System Overview...........................................................		17
GPS Sensor System .................................................		17
Accuracy....................................................................		18
Features … Applies to All Models .............................		18
Output Data Rate.......................................................		18
NCT Binary Proprietary Data.....................................		19
NMEA-0183 Data ......................................................		20
Models ...........................................................................		21
SF-2050G ..................................................................		21
SF-2050M..................................................................		21
SF-2050R ..................................................................		22
Antennae........................................................................		22
Standard ....................................................................		22

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Airborne (option)........................................................		23
L-band (option – SF-2050R only)..............................		23
Controller .......................................................................		24
Applications ...............................................................		26
Unique Features ............................................................		26
Chapter 2	Interfacing........................................	29
Electrical Power.........................................................		29
Communication Ports ................................................		32
CAN Bus/Event .........................................................		35
Event .........................................................................		35
1 PPS ........................................................................		36
Indicator Panel...............................................................		37
Chapter 3	Installation .......................................	41
Standard Antenna .....................................................		41
L-Band Antenna (SF-2050R Only) ............................		43
GPS Sensor...............................................................		44
Block Diagrams .........................................................		46
Communication Port Connectivity .............................		48
GPS Antenna Connector...........................................		49
Chapter 4	Configuration ..................................	53
Factory Default Settings ................................................		54
Message Descriptions ...............................................		56
3rd Party Controller Configuration Settings................		58
Chapter 5	Safety Instructions..........................	59
Transport ...................................................................		59
Maintenance..............................................................		59
External Power Source..............................................		59
Safety First ................................................................		60
A GPS Module Specifications .............................		61
Features ....................................................................		61
Time-To-First-Fix.......................................................		62
Dynamics...................................................................		62
Measurement Performance.......................................		63
User programmable output rates ..............................		64
Data Latency .............................................................		64
1PPS .........................................................................		64
Connector Assignments ............................................		64
Input/Output Data Messages.....................................		65
LED Display Functions (Default) ...............................		65
Satellite Based Augmentation System Signals .........		66
Physical and Environmental......................................		66

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B	Antenna Specifications ....................................	67
	Radiation Pattern.......................................................	69
	Radiation Pattern.......................................................	73
C	StarFire™ ..........................................................	75
	Description.................................................................	75
	Infrastructure .............................................................	76
	Reliability ...................................................................	77
	How to Access the StarFire™ Service ..........................	78
D	Event Input Configuration................................	81
Glossary ..........................................................		83

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List of Figures
Figure 1: SF-2050 Supplied Equipment ..................	25
Figure 2: Universal Power Adapter..........................	30
Figure 3: AC Power Cord ........................................	30
Figure 4: Optional DC Power Cable ........................	31
Figure 5: SF-2050 Front View .................................	33
Figure 6: NavCom Serial Cable...............................	34
Figure 7: SF-2050M Only Back View ......................	35
Figure 8: SF-2050 Indicator Panel...........................	37
Figure 9: Standard GPS/L-band Antenna................	41
Figure 10: SF-2050 Base Plate Dimensions ...........	45
Figure 11: SF-2050G/M Block Diagram ..................	46
Figure 12: Radio Port Configuration, StarUtil ..........	47
Figure 13: SF-2050R Block Diagram.......................	47
Figure 14: Communication Port Connections..........	49
Figure 15: StarUtil NMEA Message List ..................	54
Figure 16: StarUtil Rover Navigation Setup.............	55
Figure B1: AN-2004T Antenna Dimensions ............	68
Figure B2: AN-2004T Radiation Pattern..................	69
Figure B3: L-Band Antenna Dimensions .................	71
Figure B4: L-Band Mounts.......................................	72
Figure B5: AN-2001L Radiation Pattern ..................	73
Figure B6: Optional Airborne Antenna Dimensions. 74
Figure C1: StarFire™ Network ................................	80
Figure D1: Event Cable Wiring Diagram .................	81
Figure D2: PPS & Event Latch Configuration..........	82
Figure D3: Event Latch Output Rate Configuration . 82
Figure G1: DTE to DCE RS-232 Pin Assignments..	86

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List of Tables
Table 1: Supplied Equipment...................................	25
Table 2: External Power Cable Pin-Out ...................	29
Table 3: Optional DC Pwr Cable Pin Assignments ..	31
Table 4: Serial Cable Pin-Outs ................................	33
Table 5: Link LED Indication (Default) .....................	38
Table 6: Base Station Indication ..............................	38
Table 7: GPS Light Indication ..................................	39
Table 8: Acceptable Cable Lengths .........................	50
Table 9: Factory Setup Proprietary Msg COM 2......	56
Table B1: Standard Antenna....................................	67
Table B2: L-band SF-2050R Antenna......................	70
Table D1: Event Wiring Connections .......................	81

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Notices

SF-2050 GPS Products User Guide

P/N 96-310002-3001

Revision G

July 2008

Serial Number:

Date Delivered:

Purchased From:

Copyright

♥ 2008 by NavCom Technology, Inc.

All rights reserved. No part of this work or the computer program(s) described herein may be reproduced, stored, or transmitted by any means, without the expressed written consent of the copyright holders. Translation in any language is prohibited without the expressed written consent of the copyright holders.

Trademarks

‘find your way’, ‘NavCom Globe’ and ‘NAVCOM TECHNOLOGY’ logos are trademarks of NavCom Technology, Inc. StarFire™ is a registered trademark of Deere & Company. All other product and brand names are trademarks or registered trademarks of their respective holders.

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FCC Notice

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.

The GPS sensor has been tested in accordance with FCC regulations for electromagnetic interference. This does not guarantee non-interference with other equipment. Additionally, the GPS sensor may be adversely affected by nearby sources of electromagnetic radiation.

The Global Positioning System is under the control of the United States Air Force. Operation of the GPS satellites may be changed at any time and without warning.

User Notice

NavCom Technology, Inc. shall not be responsible for any inaccuracies, errors, or omissions in information contained herein, including, but not limited to, information obtained from third party sources, such as publications of other companies, the press, or competitive data organizations.

This publication is made available on an “as is” basis and NavCom Technology, Inc. specifically disclaims all associated warranties, whether express or implied. In no event will NavCom Technology, Inc. be liable for direct, indirect, special, incidental, or consequential damages in connection with the use of or reliance on the material contained in this publication, even if advised of the possibility of such damages. NavCom Technology, Inc. reserves the right to make

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improvements or changes to this publication and the products and services herein described at any time, without notice or obligation.

Limited Warranty

NavCom Technology, Inc., warrants that its products will be free from defects in workmanship at the time of delivery. Under this limited warranty, parts found to be defective or defects in workmanship will be repaired or replaced at the discretion of NavCom Technology, Inc., at no cost to the Buyer, provided that the Buyer returns the defective product to NavCom Technology, Inc. in the original supplied packaging and pays all transportation charges, duties, and taxes associated with the return of the product. Parts replaced during the warranty period do not extend the period of the basic limited warranty.

This provision does not extend to any NavCom Technology, Inc. products, which have been subjected to misuse, accident or improper installation, maintenance or application, nor does it extend to products repaired or altered outside the NavCom Technology, Inc. production facility unless authorized in writing by NavCom Technology, Inc.

This provision is expressly accepted by the buyer in lieu of any or all other agreements, statements or representations, expressed or implied, in fact or in law, including the implied warranties of merchantability and fitness for a particular purpose and of all duties or liabilities of NavCom Technology, Inc. To the buyer arising out of the use of the goods, and no agreement or understanding varying or extending the same will be binding upon NavCom Technology, Inc. unless in writing, signed by a dulyauthorized officer of NavCom Technology, Inc.

This limited warranty period is one (1) year from date of purchase.

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StarFire™ Licensing

The StarFire™ signal requires a subscription that must be purchased in order to access the service. Licenses are non-transferable, and are subject to the terms of the StarFire™ Signal License agreement. For further details on the StarFire™ Signal Network, its capabilities, terms and conditions visit www.navcomtech.com or send an email inquiry to [e-mail]

USG FAR

Technical Data Declaration (Jan 1997)

The Contractor, NavCom Technology, Inc., hereby declares that, to the best of its knowledge and belief, the technical data delivered herewith under Government contract (and subcontracts, if appropriate) are complete, accurate, and comply with the requirements of the contract concerning such technical data

Global Positioning System

Selective availability (S/A code) was disabled on 02 May 2000 at 04:05 UTC. The United States government has stated that present GPS users use the available signals at their own risk. The US Government may at any time end or change operation of these satellites without warning.

The U.S. Department of Commerce Limits Requirements state that all exportable GPS products contain performance limitations so that they cannot be used to threaten the security of the United States.

Access to satellite measurements and navigation results will be limited from display and recordable output when predetermined values of velocity and altitude are exceeded. These threshold values are far

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SF-2050 User Guide – Rev. G

in excess of the normal and expected operational parameters of the SF-2050 GPS Sensor.

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		SF-2050 User Guide – Rev. G
	Revision History
	Rev A (Dec 2002)	Initial release
	Rev B (Feb 2003)	Inserted missing block bracket
		(open) in Table 2 Cell A2
		Replaced Redondo Beach
	Rev C (Nov 2003)	contact information with
		Torrance.
		Added appendix detailing
		specifications for Event input;
		wiring diagram, Event HI/LO
	Rev D (Mar 2005)	wiring table, and message
		output instructions.
		Minor grammatical corrections.
		Used production model photo of
		SF-2050 on cover.
		Added USG FAR Statement
		Made changes that denote
		NCT-2100 where applicable
		Minor formatting changes to
	Rev E (Aug 2005)	wording, tables, etc.
		Changed Controller & Data Logger
		graphic to better depict the text.
		Changed antenna output voltage to
		4.6 nominal
		Changed power table to reflect
		NCT-2100 levels

(continued on next page)

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SF-2050 User Guide – Rev. G

		Format change
		Add content for SF-2050R
		Updated Specifications
		Add RF cabling requirements
		Add antenna patterns
		Add related standards
		Add related documents
		Expand product overview
		Add NMEA
	Rev F (Apr 2007)	Add DC to DC cable
		Add RTK Link LED
		Add antenna placement guidelines
		Update dimensional drawings
		Add block diagrams
		Remove datum description from text
		body
		Add figures for port settings
		Expand port configuration
		descriptions
		Add DCE DTE definitions
		Add wiring diagrams
		Move TOC to front of guide
		Add NavCom Release Notes to
		Related Documents
		Add RTCA/DO-229D standard
		(WAAS, EGNOS, MSAS,
		GAGAN)
		Add UltraRTK™ specs
	RevG (July 2008)	Add NMEA message GBS
		ITRF2000 update to ITRF2005
		(Apr 08) as reference for
		StarFire™ position outputs
		Update text and graphics pertaining
		to StarFire™ -- new satellite
		uplink sites
		Add Optional Airborne Antenna
		Dimensional Drawing

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SF-2050 User Guide – Rev. G

Use of this Document

This User Guide is intended to be used by someone familiar with the concepts of GPS and satellite surveying equipment.

Note indicates additional information to make better use of the product.

This symbol means Reader Be Careful. Indicates a caution, care, and/or safety situation. The user might do something that could result in equipment damage or loss of data.

This symbol means Danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical and RF circuitry and be familiar with standard practices for preventing accidents.

Revisions to this User Guide can be obtained in a digital format from http://www.navcomtech.com/Support/

Related Documents

StarUtil User Guide

P/N 96-310008-3001

Describes the operation and use of NavCom’s Windows based control program (included on CD)

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SF-2050 User Guide – Rev. G

Technical Reference Manual

P/N 96-3120001-3001

Describes the control and output data message formats utilized by this instrument (for customer programming purposes; included on CD)

RINEXUtil User Guide

P/N 96-310021-2101

Describes the conversion program used on NavCom proprietary output data message formats to RINEX ver 2.10 observation and navigation files (for customer programming purposes; included on CD)

Integrators Toolkit P/N 97-310020-3001

Provides additional instruction and tools for developing control programs for this instrument (not included in the packaging material; contact http://www.navcomtech.com/Support/ for a copy).

NavCom Release Notes

Describes software updates for NavCom products. Current and archived Release Notes are available on the NavCom web site: http://www.navcomtech.com/Support/DownloadCente r.cfm?category=releasenotes.

NavCom Customer Support provides software updates described in the Release Notes. Submit a request for software updates via the Request Support web page.

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SF-2050 User Guide – Rev. G

Related Standards

ICD-GPS-200

NAVSTAR GPS Space Segment / Navigation User Interfaces Standard. ARINC Research Corporation; 2250 E. Imperial Highway; El Segundo, California 90245

RTCM-SC-104

Recommended Standards For Differential GNSS

Service. Radio Technical Commission For Maritime

Services; 1800 N. Kent St, Suite 1060; Arlington,

Virginia 22209

CMR, CMR+

Compact Measurement Record; Trimble Navigation

Limited; 935 Stewart Drive; Sunnyvale, CA 94085

NMEA-0183

National Marine Electronics Association Standard For

Interfacing Marine Electronic Devices. NMEA

National Office; 7 Riggs Avenue; Severna Park,

Maryland 21146

Publicly-Operated SBAS Signals

RTCA/DO-229D

The Radio Technical Commission for Aeronautics (RTCA) develops consensus-based recommendations regarding communications, navigation, surveillance, and air traffic management (CNS/ATM) system issues.

RTCA. 1828 L Street, NW, Suite 805, Washington, DC 20036.

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SF-2050 User Guide – Rev. G

These organizations implement the RTCA/DO-229D standard set by RTCA:

WAAS (Wide Area Augmentation System)

U.S. Department of Transportation. Federal Aviation Administration. 800 Independence Ave, SW, Washington, DC 20591

EGNOS (European Geostationary Navigation Overlay Service)

European Space Agency. 8, 10 rue Mario-Nikis, F-75738 Paris Cedex 15, France.

MSAS (MTSAT Satellite-based Augmentation System)

Japan Civil Aviation Bureau. Ministry of Transport. Kasumigaseki 2-1-3, Chiyoda-ku, Tokyo 100, Japan.

GAGAN (GPS Aided Geo Augmented Navigation)

Indian Space Research Organization. Antariksh Bhavan, New Bel Road, Bangalore - 560 094, India.

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	SF - 2050 User Guide – Rev. G
Chapter 1	.............................. Introduction

System Overview

GPS Sensor System

The SF-2050 GPS sensor delivers unmatched accuracy to the precise positioning community. This unique receiver is designed to use NavCom’s 1StarFire™

network, which is a worldwide Satellite Based Augmentation System (SBAS) for decimeter level position accuracy (post-convergence period). The receiver is also capable of NCT 2RTK/UltraRTK™, RTCM (code and phase), and CMR/CMR+ DGPS operating methods. The operating software is also capable of supporting an external radio modem.

The SF-2050 integrated sensor consists of:

924-channel, dual-frequency, precision GPS receiver

92 separate SBAS channels, RTCA/DO-229D compliant (WAAS/EGNOS/MSAS/GAGAN)

91StarFire™ L-Band receiver

There are three models, the SF-2050G, SF-2050M and the SF-2050R. Packaging and performance standards of the models are the same; the differences lie in the features, as described later in this chapter.

The system also includes a wide-band antenna with a built-in LNA (SF-2050R excluded) and other

1Subscription Required; 2Separate Software Option Required.

UltraRTK™ Requires NCT-2100D Engine.

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SF-2050 User Guide – Rev. G

interconnection accessories outlined in Table 1, later in this chapter.

Accuracy

When WAAS, EGNOS, MSAS, or GAGAN (RTCA/DO-229D compliant) SBAS correction signals are used, the system provides <50cm position accuracy.

System accuracy with WAAS, EGNOS, MSAS, or GAGAN signals is subject to the quality and update rate of these publicly-operated signals. Refer to Related Standards/PubliclyOperated SBAS Signals for contact information regarding the organizations that implement the RTCA/DO-229D standard.

The system provides <10cm position accuracy (post- 2convergence period) when StarFire™ correction signals are used.

The system provides instant <0.5cm position accuracy when 1UltraRTK™ correction signals are used (base-line, <40km, 0.5cm +1ppm). UltraRTK™ requires GPS software version 4.2 or higher.

The system provides instant <1cm position accuracy when RTK1 correction signals are used. (base-line, <10km, 1cm +1ppm)

Features … Applies to All Models

Output Data Rate

Both SF-2050 models can output proprietary raw data at programmable rates from <1Hz to predetermined rates up to 50Hz1 and Position Velocity Time (PVT)

1Separate Software Option Required; 2See Glossary or Web-site

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data at programmable rates from <1Hz to predetermined rates up to 25Hz1 through two 115kbps RS-232 serial ports with less than 20ms latency. <10cm horizontal and <15cm vertical accuracy are maintained as each output is independently calculated based on an actual GPS position measurement, as opposed to an extrapolation/interpolation between 1Hz measurements.

NCT Binary Proprietary Data

The sensor can output proprietary raw data containing information including (but not limited to):

9Satellite Ephemeris (0x81)

9Satellite Almanac (0x44)

9Raw Pseudorange Measurements (0xB0)

9Position, Height, & Time (0xB1)

9Velocity & Heading (0xB1)

9Signal to Noise (0x86)

9Channel Status (0x86)

9Correction Data (mirror data; 0xEC)

9Event/Marker (M model only; 0xB4)

9Measurement Quality (0xB1 and 0xB5)

These data can be integrated in real-time positioning applications or post-processed against any number of software applications designed to handle NCT or RINEX raw data. A Technical Reference Manual is available on NavCom’s web site, which describes the attributes of each of the input/output records (see Related Documents in the fore-matter).

1Separate Software Option Required

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SF-2050 User Guide – Rev. G

NMEA-0183 Data

The SF-2050 is capable of outputting several standard NMEA-0183 data strings (see Related Standards in the fore-matter) and one proprietary data sting. Each data is headed with GP. The proprietary data sting is denoted with a $PNCT header.

Standard:

9ALM – GPS Almanac Data

9GBS – GNSS Satellite Fault Detection

9GGA – GPS Fix Data

9GLL – Geographic Position – Lat / Lon

9GSA – GNSS DOP & Active Satellites

9GST – GNSS Pseudorange Error Statistics

9GSV – GNSS Satellites In View

9RMC – Recommended Minimum Specific GNSS Data

9VTG – Course Over Ground & Ground Speed

9ZDA – Time & Date

Proprietary (header $PNCT):

9SET – Solid Earth Tide

Described in the Technical Reference Manual (see

Related Documents in the fore-matter)

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Models

SF-2050G

This model is designed for:

9Geographical Information System (GIS)

9Aerial Surveying (VueStar)

9Hydrographic Surveying

9Post-processed Dual-frequency Surveys

9Real-time Positioning Applications

The sensor can be carried in a backpack with the antenna either pole-mounted from the backpack or on a survey pole.

SF-2050M

This model is ideal for vehicle mounting to suit a wide variety of machine guidance and control applications in:

9Agriculture

9Mining

9Aerial Surveying

9Hydrographic Surveying

It is equipped with additional features allowing interconnectivity with a wide variety of antennas, vehicle data busses and other instrumentation to suit specific applications and configurations. Features that distinguish this model include:

9A 1PPS output port

9A combined Event/CAN Bus interface port1

9A wide variety of antennas

1An Event latch interface may be necessary for mechanically devices (i.e. camera shutter)

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SF-2050 User Guide – Rev. G

SF-2050R

This model is the same as the M model, except that it is designed for vehicle mounting with separate antennas for GPS/WAAS/EGNOS/MSAS/GAGAN (PN: 82-001002-3002) and StarFire™ (PN: 82- 001003-0001). The purpose of the separate antenna systems is to provide better low-elevation look angles to the StarFire™ signals in high-latitude locations.

The GPS antenna port provides 4.3VDC and the StarFire™ antenna port provides 5.0VDC. Care must be taken to select an appropriately rated GPS antenna if the standard NavCom antenna is not used.

Antennae

Standard

The standard integrated antenna (PN: 82-001002- 3002) tracks all GPS,

WAAS/EGNOS/MSAS/GAGAN and StarFire™ signals. Our compact GPS antenna has excellent tracking performance and a stable phase center for GPS L1 and L2. This antenna is listed in the NOAA GPS Antenna Calibration tables, as NAVAN2004T. The robust housing assembly features a standard 5/8” BSW thread for mounting directly to a surveyor’s pole, tripod, or mast and is certified to 70,000 feet (see Specifications for restrictions).

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SF-2050 User Guide – Rev. G

Airborne (option)

Included with the VueStar system.

The airborne integrated antenna (PN: 82-001002-

3001) tracks all GPS, WAAS/EGNOS/MSAS/GAGAN and StarFire™ signals. Our compact GPS antenna has excellent tracking performance and a stable phase center for GPS L1 and L2. This antenna is listed in the NOAA GPS Antenna Calibration tables, as NAVAN2008T. The robust housing assembly features a flat mounting surface with four mounting holes and a downward facing TNC connector. This antenna is also certified to 70,000 feet (see Specifications for restrictions).

L-band (option – SF-2050R only)

The L-band antenna (PN: 82-001003- 0001) tracks StarFire™ signals. This antenna has excellent tracking performance of geostationary satellites for latitudes furthest from the equator. The robust housing assembly features a flat mounting surface with two mounting holes and a 3m coaxial cable with an SMA and a TNC connector. A 5/8” surveyors mount is also available. The SF-2050R uses the SF-2050M GPS antenna to receive the GPS and WAAS/EGNOS/ MSAS/GAGAN signals.

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Controller

The SF-2050 GPS sensor is designed for use with an external controller solution connected via one of two serial COM ports.

This may be accomplished using a PC, Tablet PC or Personal Digital Assistant (PDA) and a software program which implements the rich control language defined for NavCom GPS products. Refer to the user’s guide of your controller solution for further information. NavCom lists several application software solutions on our website: http://www.navcomtech.com/Support/ApplicationSoftware.cfm

In addition, NavCom provides a Windows™ based software utility, called StarUtil, with the receiver.

The StarUtil User Guide, P/N 96-310008-3001, is available on-line at http://www.navcomtech.com/Support/DownloadCenter.cfm?categ ory=manuals.

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Included Items

Figure 1: SF-2050 Supplied Equipment

Table 1: Supplied Equipment

SF-2050 GPS Sensor

1(SF-2050G P/N 92-310056-3001) (SF-2050M P/N 92-310056-3002) (SF-2050R P/N 92-310056-3003)

2LEMO 7-Pin to DB9S Data Cable, 6 ft (P/N 94-310059-3006)

3Compact L1/L2 Tri-Mode GPS Antenna (P/N 82-001002-3002)

4GPS Antenna Cable, 12 ft (P/N 94-310058-3012)

5LEMO 4-Pin Universal AC/DC Power Adapter 12vdc, 2A (P/N 82-020002-5001)

CD-Rom containing User Guides, brochures, software

6utilities, and technical papers. (P/N 96-310006-3001)

7SF-2050 User’s Guide {Not Shown} (P/N 96-310002-3001 Hard Copy)

8Ruggedized Travel Case {Not Shown} (P/N 79-100100-0002)

9American 2-Pin AC power Cord, 10 ft {Not Shown}

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Applications

The SF-2050 GPS sensors meet the needs of a large number of applications including, but not limited to:

9Land Survey / GIS

9Asset Location

9Hydrographic Survey

9Photogrammetric Survey

9Machine Control

9Railway, Ship and Aircraft Precise Location

NavCom lists several application software solutions on our website: http://www.navcomtech.com/Support/ApplicationSoft ware.cfm

Unique Features

The SF-2050 GPS sensor has many unique features:StarFire™

The ability to receive NavCom’s unique 1StarFire™ correction service is fully integrated within each unit (no additional equipment required). A single set of corrections can be used globally enabling a user to achieve decimeter level positioning accuracy without the need to deploy a separate base station, thus saving time and capital expenditure.

StarFire™ position outputs are referenced to the ITRF2005 (Apr. 08) datum.

Positioning Flexibility

The SF-2050 is capable of using WAAS, EGNOS, MSAS, GAGAN (RTCA/DO-229D compliant) code corrections via two internal Satellite Based Augmentation System (SBAS) channels. The

1Subscription Required

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SF-2050 automatically configures to use the most suitable correction source available and changes as the survey dictates (this feature can be overridden).

RTK Extend™

1RTK Extend™ enables continuous real-RTK/RTK level positioning accuracy during radio communication outages by utilizing NavCom’s global StarFire™ corrections.

Traditionally, when an RTK rover loses communication with the base station, it is unable to continue to provide centimeter position updates for more than a few seconds, resulting in user down-time and reduced productivity. With RTK Extend™, a NavCom StarFire™ receiver operating in RTK mode, can transition to RTK Extend™ mode and maintain centimeter level positioning during communication loss for up to 15 minutes. RTK Extend™ allows more efficient and uninterrupted work, enabling focused concentration on the work rather than the tools.

Data Sampling

GPS L1 and L2 raw measurement data is up to 5Hz in the standard configuration. An optional upgrade allows 10, 25, and 50Hz raw measurement data via either of the two serial ports.

The PVT (Position, Velocity, & Time) data is output at up to 5 Hz in the standard configuration. An optional upgrade allows 10 and 25Hz position updates for highly dynamic applications.

GPS Performance

The SF-2050 utilizes NavCom’s NCT-2100 GPS engine, which incorporates several patented innovations. The engine’s industry leading receiver sensitivity provides more than 50% signal to noise

1Separate Software Option Required

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SF-2050 User Guide – Rev. G

ratio advantage over competing technologies. This results in improved real time positioning, proven through independent tests, when facing various multipath environments.

Rugged Design

Units have been tested to conform to MIL-STD-810F for low pressure, solar radiation, rain, humidity, saltfog, sand, and dust.

The rugged design of the SF-2050 system components provides protection against the harsh environments common to areas such as construction sites, offshore vessels, and mines.

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