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SF-2050 User Guide - Rev. E

 

 

SNR see 

signal-to-noise

 Ratio. 

 
StarFire

™

 a set of real-time global orbit and clock 

corrections for 

GPS

 satellites. StarFire

™

 equipped 

receivers are capable of real-time decimeter positioning  
(see Appendix C).  
 
Spread Spectrum Radio (SSR)  a radio that uses wide 
band, noise like (pseudo-noise) signals that are hard to 
detect, intercept, jam, or demodulate making any data 
transmitted secure. Because spread spectrum signals are 
so wide, they can be transmitted at much lower spectral 
power density (Watts per Hertz), than narrow band 
transmitters. 
 
SV (Space Vehicle) a 

GPS

 satellite. 

 
Universal Time Coordinated (

UTC

) a time standard 

maintained by the US Naval Observatory, based on 
local solar mean time at the Greenwich 

meridian

. 

GPS

 

time is based on 

UTC

. 

 
UTC see 

Universal time coordinated

. 

 
WAAS  (Wide Area Augmentation System)  a set of 
corrections for the 

GPS

 satellites, which are valid for the 

Americas region. They incorporate satellite orbit and 
clock corrections. 

WAD

GPS

 (

Wide Area Differential GPS

)  a set of 

corrections for the 

GPS

 satellites, which are valid for a 

wide geographic area. 

WGS-84 (World Geodetic System 1984) the current 
standard datum for global positioning and surveying. 
The WGS-84 is based on the GRS-80 

ellipsoid

. 

 
Y-code the name given to encrypted 

P-code

 when the 

U.S. Department of Defense uses 

selective availability

.

Glossary-64 

Содержание GPS Products

Страница 1: ...logy Inc 20780 Madrona Avenue Torrance CA 90503 USA Tel 1 310 381 2000 Fax 1 310 381 2001 sales navcomtech com www navcomtech com S SF F 2 20 05 50 0 G GP PS S P Pr ro od du uc ct ts s U Us se er r G...

Страница 2: ......

Страница 3: ...SF 2050 User Guide Rev E Table of Contents Table of Contents i Notices ii Chapter 1 Introduction 8 System Overview 8 Applications 12 Unique Features 12 Chapter 2 Interfacing 15 Electrical Power 15...

Страница 4: ...e reproduced or stored or transmitted by any means without the written permission of the copyright holders Translation in any language is prohibited without the permission of the copyright holders Tra...

Страница 5: ...RD 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 DISCLAI...

Страница 6: ...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 alter...

Страница 7: ...For further details on the StarFire Signal Network its capabilities terms and conditions visit www navcomtech com or send an email inquiry to sales navcomtech com USG FAR Technical Data Declaration J...

Страница 8: ...sed 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 a...

Страница 9: ...User Guide Rev E Items that have been ITALICIZED indicate a term or acronym that can be found in the Glossary Revisions to this User Guide can be obtained in a digital format from support navcomtech...

Страница 10: ...n L Band demodulator for reception of NavCom s StarFire Network correction service for instant decimeter level position accuracy anywhere in the world anytime The sensor can output proprietary raw dat...

Страница 11: ...d configurations The SF 2050M also has a 1PPS output port and a combined Event CAN Bus interface port Both SF 2050 models can output proprietary raw data as fast as 50Hz optional and Position Velocity...

Страница 12: ......

Страница 13: ...sal AC DC Power Adapter 12vdc 2 amp P N 82 020002 5001 LEMO 7 Pin to DB9S Data Communications Cable P N 94 310059 3006 CD Rom P N 96 310006 3001 containing User Guides to NavCom Technology Inc product...

Страница 14: ...red The ability to receive NavCom s unique StarFire correction service is fully integrated within each unit with no additional equipment required A single set of corrections can be used globally enabl...

Страница 15: ...Navigation Overlay Service EGNOS code corrections The SF 2050 configures itself to use the most suitable correction source available and changes as the survey dictates RTK Extend RTK Extend enables c...

Страница 16: ...50 incorporates several patented innovations The receiver provides more than 50 signal to noise ratio advantage over competing technologies The benefit to the user is improved real time positioning wi...

Страница 17: ...panel of the SF 2050 and labeled DC PWR The pin designations are shown in Table 1 see Figure 2 for pin rotation on unit Pin Description 1 2 Return 3 4 Power Input 10 to 30 VDC Table 1 External Power...

Страница 18: ...assembly The GPS sensor is protected from reverse polarity by an inline diode It will operate on any DC voltage between 10 and 30 VDC capable of supplying the required current typically Power Consumpt...

Страница 19: ...a speeds between 1200 bps and 115 2kbps The pin outs for these connectors are described in Table 2 An interface data cable NavCom P N 94 310059 3006 is supplied with the SF 2050 for easy startup The c...

Страница 20: ...SF 2050 User Guide Rev E Figure 2 SF 2050 Front View Figure 3 SF 2050M Only Back View 2 18...

Страница 21: ...ends Indicator Panel Figure 5 SF 2050 Indicator Panel The Indicator Panel provides the on off I O switch and a quick view of the status of the SF 2050 GPS sensor corrections source type and StarFire...

Страница 22: ...software configurable via the appropriate NavCom proprietary command Because of the numerous scenarios available for the Link light only the factory default configuration Rover Mode is discussed LINK...

Страница 23: ...GPS sensor configuration The GPS LEDs will blink at the PVT positioning rate selected GPS LEDs Table 5 GPS Light Indication GPS Status Power is off Power is on No satellites tracked Tracking satellit...

Страница 24: ...Edge Synchronization Connecting the 1PPS output requires a cable with a BNC male connector NavCom P N 94 310050 3003 0 9m 3ft long BNC male to BNC male cable CAN Bus Event The SF 2050M also employs a...

Страница 25: ...f a camera s aperture would output a pulse to the Event port and have the receiver output position and time information relative to when the photograph was taken Specifications 50 Ohm input impedance...

Страница 26: ...means of mounting the antenna It is possible to remove the 5 8 inch BSW threaded alloy insert to reveal the secondary means of mounting the antenna which consists of a 1 14UNS 2B thread with a depth o...

Страница 27: ...recent satellite almanac to assess the impact on satellite visibility at that location Potential sources of interference should also be avoided where possible Examples of interference sources include...

Страница 28: ...e for 1 8kg 4lbs should be considered The SF 2050G can be installed in a backpack for mobile surveying applications The sensor should not be placed in a confined space or where it may be exposed to ex...

Страница 29: ...to your controlling device Note that some devices may require an additional adaptor as the receiver is configured as a DCE device By factory default COM 2 is the control port for the SF 2050 COM 1 ca...

Страница 30: ...om cable P N 94 310058 3012 provides a 3 6m 12ft length of RG58 U cable with a right angle male TNC connector to a straight male TNC connector suitable for connecting the SF 2050 GPS sensor to the Tri...

Страница 31: ...osed to sources of electromagnetic discharge such as lightning an in line electrical surge suppressor properly grounded should be considered between the GPS sensor and antenna Such installations shoul...

Страница 32: ...tput of NMEA messages GGA VTG scheduled 1Hz rate COM2 Configuration Control Port Rate 19 2Kbps Input output of Navcom Proprietary messages used for Navigation and receiver setup Table 6 describes the...

Страница 33: ...PVT Block Table 6 Factory Setup Proprietary Messages COM 2 The term On Change indicates that the SF 2050 will output the specified message only when the information in the message changes Thus in som...

Страница 34: ...Time of Week NCT 2100 Engine status solution status number of satellites being tracked and the number and identity of satellites used in solution PDOP and the satellite PRN A0 Alert Text Message Detai...

Страница 35: ...SF 2050 User Guide Rev E Advanced Configuration Settings If a third party Controller Solution was provided with your SF 2050 GPS sensor please refer to that manual user guide 4 33...

Страница 36: ...ment 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 a...

Страница 37: ...ity External Power Source The SF 2050 is supplied with an external power cable P N 94 310060 3010 This must be connected to the chosen external power solution in accordance with Chapter 2 Interfacing...

Страница 38: ...equipment warranty Care should be taken to ensure that the SF 2050 does not come into contact with electrical power installations the unit is securely fastened and there is protection against electro...

Страница 39: ...s faster satellite acquisition upon unit power up The cell has been designed to meet over 10 years of service life before requiring replacement at a NavCom approved maintenance facility Features All i...

Страница 40: ...and Environmental Size L x W x H 8 18 x 5 67 x 3 06 Weight 4 lbs 1 81 kg External Power Input Voltage 10 VDC to 30 VDC Power Consumption 8 W Connectors I O Ports 2 x 7 pin Lemo DC Power 4 pin Lemo RF...

Страница 41: ......

Страница 42: ...nds NMEA Messages ALM GGA GLL GSA Output Only GSV RMC VTG ZDA GST Proprietary NMEA Type SET Output Only Code Corrections RTCM 1 or 9 WAAS EGNOS StarFire RTK Correction Data I O v 2 2 NCT Proprietary R...

Страница 43: ...SF 2050 User Guide Rev E Satellite Based Augmentation System Signals WAAS EGNOS StarFire A 41...

Страница 44: ...GPS L2 L1 Phase Centre 58 7mm Polarization Right Hand Circular RHCP Finish Fluid resistant Ultem UV stable Cable Connector TNC Female Pre Amplifier 39dB gain 2 Input Voltage 4 2 to 15 0 VDC Impedance...

Страница 45: ...ode Antenna Dimensions In order to achieve the greatest level of accuracy the absolute phase center values must be incorporated into your processing For phase center information on the Tri Mode Antenn...

Страница 46: ...nd unprecedented accuracy of better than 10cm 4 inches Because the SBAS corrections are broadcast via Inmarsat geo stationary satellites the user needs no local reference stations or post processing t...

Страница 47: ...y in England and Auckland in New Zealand for uplink to the geo stationary satellites The key to the accuracy and convenience of the StarFire system is the source of SBAS corrections GPS satellites tra...

Страница 48: ...oadcasts it over the coverage area Each L Band satellite covers more than a third of the earth Users equipped with a StarFire precision GPS receiver actually have two receivers in a single package a G...

Страница 49: ...ng sets of uplink equipment arbitrated by an automatic fail over switch Finally a comprehensive team of support engineers maintains round the clock monitoring and control of the system The network is...

Страница 50: ...e initial license is preinstalled at the factory and subsequent licenses will be installed by the user The only piece of equipment needed to use the StarFire system is a StarFire receiver NavCom offer...

Страница 51: ...SF 2050 User Guide Figure C1 StarFire Network C 49...

Страница 52: ...d for Event Hi and Event Lo pulse sensing Figure D1 Event Cable Wiring Diagram Pin Signal Name Event Sync Wiring 1 Event Lo Tie Event Hi to Ground 2 Event Hi Tie Event Lo to Ground 3 Ground N A Table...

Страница 53: ...tion Next the Event Latch message 0xB4 must be enabled in the NCT 2000 Message Output list The Message Rate for the 0xB4 must be set to On Trigger This is carried out by Right Clicking on the Rate are...

Страница 54: ...lanning software alt see altitude altitude vertical distance above the ellipsoid or geoid It is always stored as height above ellipsoid in the GPS receiver but can be displayed as height above ellipso...

Страница 55: ......

Страница 56: ...anipulate the I O functions of the GPS sensor Compact Measurement Record CMR a standard format for DGPS corrections used to transmit corrections from a reference station to rover sensors data files fi...

Страница 57: ...erent components of the error Note this is a unitless value see also PDOP DOP see Dilution of Precision dual frequency a type of GPS receiver that uses both L1 and L2 signals from GPS satellites A dua...

Страница 58: ...d by the length of the said period geoid the gravity equipotential surface that best approximates mean sea level over the entire surface of the earth The surface of a geoid is too irregular to use for...

Страница 59: ...riodic leap seconds to correct for changes in the earth s period of rotation As of September 2002 GPS time is 13 seconds ahead of UTC Greenwich Mean Time GMT the local time of the 0 meridian passing t...

Страница 60: ...nd Earth Station the point on the earth s surface where data is up linked to a satellite logging interval the frequency at which positions generated by the receiver are logged to data files long see l...

Страница 61: ...A navigation file contains satellite position and time information observation YYo files one of the three file types that make up the RINEX file format Where YY indicates the last two digits of the ye...

Страница 62: ...on Dilution of Precision PDOP a measure of the magnitude of Dilution of Position DOP errors in the x y and z coordinates Post processing a method of differential data correction which compares data lo...

Страница 63: ...nce or range is not exactly the same because various factors cause errors in the measurement PVT GPS information depicting Position Velocity Time in the NCT proprietary message format Radio Technical...

Страница 64: ...relatively close to the reference station A reference station is used to improve the quality and accuracy of GPS data collected by roving receive s r RHCP Right Hand Circular Polarization used to dis...

Страница 65: ...s Jet Propulsion Laboratory to provide a single set of real time global corrections for the GPS satellites S A see Selective availability SBAS Satellite Based Augmentation System this is a more gener...

Страница 66: ...GPS satellite Universal Time Coordinated UTC a time standard maintained by the US Naval Observatory based on local solar mean time at the Greenwich meridian GPS time is based on UTC UTC see Universal...

Страница 67: ...SF 2050 User Guide Rev E Glossary 65...

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