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NavCom Technology GPS Products User Manual

Manual is about: GPS Products User Guide

Summary of GPS Products

  • Page 1

    Navcom technology, 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 s f f - - 2 2 0 0 5 5 0 0 g g p p s s p p r r o o d d u u c c t t s s u u s s e e r r g g u u i i d d e e.

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    Sf-2050 user guide - rev. E table of contents table of contents ................................................. I notices.................................................................. Ii chapter 1 introduction .................................... 8 system overview.................................

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    Sf-2050 user guide - rev. E notices sf-2050 gps products user guide p/n 96-310002-3001 revision e august 2005 serial number: date delivered: copyright © 2002 by navcom technology, inc. All rights reserved. No part of this work or the computer programs described herein may be reproduced or stored or ...

  • Page 5

    Sf-2050 user guide - rev. E 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 undesi...

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    Sf-2050 user guide - rev. E 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 navco...

  • Page 7

    Sf-2050 user guide - rev. E this limited warranty period is one (1) year from date of purchase. 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 ™ sign...

  • Page 8

    Sf-2050 user guide - rev. E global positioning system selective availability ( s/a code) was disabled on 2 nd may 2000 at 04:05 utc . The united states government has stated that present gps users do so at their own risk. The us government may at any time end or change operation of these satellites ...

  • Page 9

    Sf-2050 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.Com vii.

  • Page 10

    Sf-2050 user guide - rev. E chapter 1 introduction the sf-2050 gps sensor delivers unmatched accuracy to the precise positioning community who need a cost-effective, high performance gps sensor. These unique receivers use the starfire ™ network, navcom’s worldwide sbas system, for instant decimeter ...

  • Page 11

    Sf-2050 user guide - rev. E the sf-2050g is packaged for mobility. It can be used for geographical information system (gis) , aerial and hydrographic surveying, and post-processed dual frequency surveys. The sensor can be carried in a backpack with the antenna either pole-mounted from the backpack o...

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    Sf-2050 user guide - rev. E although rated to 70k feet, this antenna is not designed for aircraft installations. E-mail sales@navcomtech.Com.

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    Sf-2050 user guide - rev. E x sf-2050 gps sensor (sf-2050g p/n 92-310059-3001) (sf-2050m p/n 93-310059-3002) y compact l1/l2 tri-mode gps antenna ( p/n 82-001002-3002) z gps antenna cable ( p/n 94-310058-3012) [ lemo 4-pin univerasal ac/dc power adapter 12vdc 2 amp ( p/n 82-020002-5001) \ lemo 7 pin...

  • Page 14

    Sf-2050 user guide - rev. E applications the sf-2050 gps sensors meet the needs of a large number of applications including, but not limited to: land survey / gis asset location hydrographic survey photogrammetric survey machine control railway, ship and aircraft precise location unique features the...

  • Page 15: Rtk Extend™

    Sf-2050 user guide - rev. E triangulation station; the parameters (radius and flattening) of the ellipsoid selected for the computations; and the geoid separation at the origin. A change in any of these quantities affects every point on the datum. For this reason, while positions within a system are...

  • Page 16

    Sf-2050 user guide - rev. E data sampling gps l1 and l2 raw data is 1 to 5hz in the standard configuration and as an optional upgrade as fast as 10, 25, and 50hz via either of the two serial ports. The pvt (position, time, & velocity) data is also 1 to5 hz in the standard configuration and as an opt...

  • Page 17

    Sf-2050 user guide - rev. E chapter 2 interfacing this chapter details the sf-2050 gps sensor connectors and status display, appropriate sources of electrical power, and how to interface the communication ports. Electrical power electrical power is input thru a 4-pin lemo female connector located on...

  • Page 18

    Sf-2050 user guide - rev. E navcom p/n 82-020002-5001 universal ac/dc 12 v 2 amp power adapter comes standard with the sf- 2050g/m/r gps receivers. An optional external power cable, navcom p/n 94-310060-3010 a 3m (10ft) unterminated power cable fitted with a lemo plug type (mfr. P/n fgg.1k.304.Clac5...

  • Page 19

    Sf-2050 user guide - rev. E communication ports the sf-2050 gps sensor is fitted with two 7-pin female lemo connector communication ports labeled com 1 and com 2 located at the bottom front of the gps sensor as shown in figure 2. Each conforms to the eia rs232 standard with data speeds between 1200 ...

  • Page 20

    Sf-2050 user guide - rev. E figure 2: sf-2050 front view figure 3: sf-2050m only back view 2-18.

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    Sf-2050 user guide - rev. E figure 4: navcom serial cable p/n 94-310059-3006 pin 5 should connect to shield of cable at both 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, correcti...

  • Page 22

    Sf-2050 user guide - rev. E to power the unit on or off, the i/o switch must be depressed for more than 3 seconds. During power up of the gps sensor, all leds will be on for a period of 3-5 seconds. Link leds the link lights are software configurable via the appropriate navcom proprietary command. B...

  • Page 23

    Sf-2050 user guide - rev. E base leds table 4: base station indication base status the base leds are not utilized in the standard sf-2050 gps sensor configuration. The gps leds will blink at the pvt positioning rate selected. Gps led s table 5: gps light indication gps status power is off power is o...

  • Page 24

    Sf-2050 user guide - rev. E 1 pps the sf-2050m has the ability to output a precise pulse every second that can be used for a variety of time/ mark applications where precise timing is critical. Specifications: - 12.5ns relative accuracy. - better than 100ns absolute accuracy. - 50 ohm, ttl level. - ...

  • Page 25

    Sf-2050 user guide - rev. E as can bus specifications are diverse, drivers for the existing hardware must be tailored to the specific manufacturer’s equipment being interfaced to. For further information, e-mail navcom customer support at customersupport@navcomtech.Com . Event the sf-2050m also can ...

  • Page 26

    Sf-2050 user guide - rev. E chapter 3 installation this chapter provides guidance on hardware installation for optimum performance. Tri-mode antenna the antenna is fitted with a 5/8 inch bsw threaded mount with a depth of 16mm (0.63 inch). This should be used as the primary means of mounting the ant...

  • Page 27

    Sf-2050 user guide - rev. E the environmental seal of the antenna, and lead to internal damage. There should be an unobstructed view of the sky above a 7-degree elevation mask for optimum gps satellite visibility. Any obstructions above the horizon should be mapped using a compass and clinometer and...

  • Page 28

    Sf-2050 user guide - rev. E figure 7: sf-2050 base plate dimensions gps sensor the sf-2050 gps sensor can be mounted to a flat surface using the four screw slots shown in figure 7. In environments with high vibration, shock absorbers suitable for 1.8kg (4lbs) should be considered. The sf-2050g can b...

  • Page 29

    Sf-2050 user guide - rev. E communication ports connect the supplied lemo 7-pin end of the navcom serial cable (navcom p/n 94-310059-3006) to com 2 (factory default control port) connector of the sf-2050. Connect the db9s end to your controlling device. Note that some devices may require an addition...

  • Page 30

    Sf-2050 user guide - rev. E gps antenna connector the connector used on the sf-2050 is a tnc female, labeled “gps ant” on the front panel of the sensor as shown in figure 2. The center pin of the tnc connector carries a voltage of nominally 4.6 vdc, which is used to power the preamplifier in the gps...

  • Page 31

    Sf-2050 user guide - rev. E 0 where the gps antenna is exposed 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 should comply with local regulatory codes a...

  • Page 32

    Sf-2050 user guide - rev. E chapter 4 configuration the sf-2050 gps sensors have a rich interface and detailed control language, which allows each unit to be tailored specifically to the required application. Factory default settings com1 configuration - data port rate – 19.2kbps output of nmea mess...

  • Page 33

    Sf-2050 user guide - rev. E message rate description 44 on change packed almanac 81 on change packed ephemeris 86 on change channel status a0 on change alert text message ae 600 seconds identification block b0 on change raw measurement data b1 on change pvt block table 6: factory setup proprietary m...

  • Page 34

    Sf-2050 user guide - rev. E seconds] that almanac was collected, almanac reference week, almanac reference time, almanac source, almanac health, pages 1-25, and subframes 4 & 5. • 81 packed ephemeris : this message provides information as it relates to individual satellites tracked, including gps we...

  • Page 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.

  • Page 36

    Sf-2050 user guide - rev. E chapter 5 safety instructions the sf-2050 gps sensor is designed for precise navigation and positioning using the global positioning system . Users must be familiar with the use of portable gps equipment, the limitations thereof and these safety instructions prior to use ...

  • Page 37

    Sf-2050 user guide - rev. E maintenance the navcom equipment may be cleaned using a new lint free cloth moistened with pure alcohol. Connectors must be inspected, and if necessary cleaned before use. Always use the provided connector protective caps to minimize moisture and dirt ingress. Cables shou...

  • Page 38

    Sf-2050 user guide - rev. E other manufacturer’s equipment must be used in accordance with the safety instructions issued by that manufacturer. This includes other manufacturer’s equipment that may be attached to navcom technology, inc. Manufactured equipment. The equipment should always be used in ...

  • Page 39

    Sf-2050 user guide - rev. E a gps sensor technical specifications the technical specifications of this unit are detailed below. Navcom technology, inc. Is constantly improving, and updating our technology. For the latest technical specifications for all products go to: support.Navcomtech.Com sf-2050...

  • Page 40

    Sf-2050 user guide - rev. E • superior interference suppression • patented multipath rejection • supports nmea 0183 v3.1 messages • self-survey mode (position averaging) • can bus interface (sf-2050m only) • 1pps output (sf-2050m only) • event marker (sf-2050m only) physical and environmental • size...

  • Page 41

    Sf-2050 user guide - rev. E • pseudo-range measurement precision (rms): raw c/a code : 20cm @ 42 db-hz raw carrier phase nois.

  • Page 42

    Sf-2050 user guide - rev. E connector assignments •data interfaces: 2 serial ports; from 1200 bps to 115.2 kbps can bus i/f (sf-2050m only) event marker i/p (sf-2050m only) 1pps (sf-2050m only) input/output data messages • nct proprietary data: pvt raw measurement satellite messages nav quality rece...

  • Page 43

    Sf-2050 user guide - rev. E satellite based augmentation system signals • waas/egnos • starfire ™ a-41.

  • Page 44

    Sf-2050 user guide - rev. E b gps antenna technical specifications the standard antenna supplied with the sf-2050 gps sensor is capable of tri-frequency reception. L1+l, l2 gps antenna 1525-1585 mhz gps l1 plus inmarsat l band 1217-1237 mhz gps l2 l1 phase centre 58.7mm polarization right hand circu...

  • Page 45

    Sf-2050 user guide - rev. E figure b1: tri-mode 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 antenna go to navcomtech.Com/support.Cfm . B-43.

  • Page 46

    Sf-2050 user guide c starfire™ description the starfire ™ network is a global system for the distribution of sbas corrections giving the user the ability to measure his position anywhere in the world with exceptional reliability and unprecedented accuracy of better than 10cm (4 inches). Because the ...

  • Page 47

    Sf-2050 user guide - rev. E infrastructure the system utilizes the gps satellite system, l-band communication satellites, and a worldwide network of reference stations to deliver real-time high precision positioning. To provide this unique service, navcom has built a global network of dual-frequency...

  • Page 48

    Sf-2050 user guide - rev. E both the reference receivers and the user receivers. It is the use of dual-frequency receivers at both the reference stations and the user equipment together with the advanced processing algorithms, which makes the exceptional accuracy of the starfire ™ system possible. C...

  • Page 49

    Sf-2050 user guide - rev. E which switch automatically or in response to a remote control signal from the processing centers. The data links from the reference stations use the internet as the primary data link and are backed up by dedicated communications lines, but in fact the network is sufficien...

  • Page 50

    Sf-2050 user guide - rev. E subscriptions can be purchased for quarterly, biannual or annual periods and are available via a navcom authorized representative, or by contacting navcom sales department . An authorized subscription will provide an encrypted keyword, which is specific to the serial numb...

  • Page 51

    Sf-2050 user guide figure c1: starfire™ network c-49.

  • Page 52

    Sf-2050 user guide - rev. E d event input configuration figure d1 details the wiring of the event/can cable assembly navcom part number p/n 94-310062-3003. Refer to chapter 2, event for detailed electrical specifications. Table d1 details the wiring configuration required for event-hi, and event-lo ...

  • Page 53

    Sf-2050 user guide - rev. E the event input can be triggered on the rising or falling edge of the input pulse. Configuration is possible thru navcoms starutil program. Figure d2 shows a screen capture of the programs pps & event latch window. Figure d2: pps & event latch configuration next, the even...

  • Page 54

    Sf-2050 user guide - rev. E glossary .Yym files see meteorological files (where yy = two digit year data was collected). .Yyn files see navigation files (where yy = two digit year data was collected). .Yyo files see observation files (where yy = two digit year data was collected). Almanac files an a...

  • Page 55

    Sf-2050 user guide - rev. E autonomous positioning ( gps ) a mode of operation in which a gps receiver computes position fixes in real time from satellite data alone, withou.

  • Page 56

    Sf-2050 user guide - rev. E civilian code see coarse acquisition code . Coarse acquisition code (c/a or civilian code ) the pseudo-random code generated by gps satellites. It is intended for civilian use and the accuracy of readings using this code can be degraded if selective availability ( s/a ) i...

  • Page 57

    Sf-2050 user guide - rev. E differential gps ( dgps ) a positioning procedure that uses two receivers, a rover at an unknown location and a reference s ation at a known, fixed location. The reference station computes corrections based on the actual and observed ranges to the satellites being tracked...

  • Page 58

    Sf-2050 user guide - rev. E elevation mask the lowest elevation , in degrees, at which a receiver can track a satellite. Measured from the horizon to zenith, 0º to 90º. Ellipsoid a mathematical figure approximating the earth’s surface, generated by rotating an ellipse on its minor axis. Gps position...

  • Page 59

    Sf-2050 user guide - rev. E global positioning system (gps) geometrically, there can only be one point in space, which is the correct distance from each of four known points. Gps measures the distance from a point to at least four satellites from a constellation of 24 navstar satellites orbiting the...

  • Page 60

    Sf-2050 user guide - rev. E l2 carrier frequency the secondary l-band carrier used by gps satellites to transmit satellite data. The frequency is 1227.6mhz. It is modulated by p-code or y-code, and a 50 bit/second navigation message. Lat see latitude. Latitude (lat) the north/south component of the ...

  • Page 61

    Sf-2050 user guide - rev. E meteorological (.Yym) files one of the three file types that make up the rinex file format. Where yy indicates the last two digits of the year the data was collected. A meteorological file contains atmospheric information. Msl see mean sea level. Multipath error a positio...

  • Page 62

    Sf-2050 user guide - rev. E pdop mask the highest pdop value at which a receiver computes positions. Phase center the point in an antenna where the gps signal from the satellites is received. The height above ground of the phase center must be measured accurately to ensure accurate gps readings. The...

  • Page 63

    Sf-2050 user guide - rev. E proprietary commands those messages sent to and received from gps equipment produced by navcom technology, inc. Own copyrighted binary language. Pseudo-random noise ( prn ) a sequence of data that appears to be randomly distributed but can be exactly reproduced. Each gps ...

  • Page 64

    Sf-2050 user guide - rev. E ionospheric and troposphere effects are used for navigation. Real-time kinematic ( rtk ) a gps system that yields very accurate 3d position fixes immediately in real-time. The base station transmits its gps position to roving receivers as the receiver generates them, and ...

  • Page 65

    Sf-2050 user guide - rev. E roving receiver see rover . Rtcm (radio technical commission for maritime services) a standard format for differential gps corrections used to transmit corrections from a base station to rovers . Rtcm allows both real-time kinematic ( rtk ) data collection and post-proces...

  • Page 66

    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 ...

  • Page 67

    Sf-2050 user guide - rev. E glossary-65.