Navcom RT-3020 Rev.A Manuel d'utilisateur

dwww.navcomtech.comNavCom Technology, Inc.123 West Torrance Blvd. Suite 101 Redondo Beach, CA 90277 USA Tel: +1 310.937.7460 Fax: +1 310.937.7464 sal

RT-3020 User Guide 1-8  Included Items Figure 1 RT-3020 Supplied Equipment X RT-3020 GPS sensor (RT-3020S P/N 92-310058-3001)

RT-3020 User Guide 1-9 [ SSR 2.4GHz Radio Antenna (P/N 82-001000-0003) \ LEMO 7 Pin to DB9S Data Communications Cable (P/N 94-310059-3006) ] CD-Rom (

RT-3020 User Guide 1-10 Applications The RT-3020 GPS sensors meets the needs of a large number of applications including, but not limited to:   

RT-3020 User Guide 1-11    Data Sampling GPS L1 and L2 raw data is 1 to 5 Hz in the standard configuration, and as an optional upgrade as fast as

RT-3020S User Guide 3-12 Chapter 2 Interfacing This chapter details the RT-3020 GPS sensor connectors and status display. Appropriate sources of ele

RT-3020S User Guide 3-13  When using an external power cable longer than 5m(15ft), it is recommended that positive voltage DC be supplied on both p

RT-3020 User Guide Communication Ports The RT-3020 GPS sensor is fitted with two 7-pin female LEMO connector communication ports located at the bot

RT-3020S User Guide Figure 2: RT-3020 Front View Figure 3: RT-3020M Only Back View 3-15

RT-3020 User Guide 3-16 Figure 5 RT-3020 Indicator Panel Figure 4: NavCom Serial Cable 94-310059-3006  Pin 5 should connect to shield of

RT-3020S User Guide To power the unit on or off, the on/off (I/O) switch must be depressed for more than 3 seconds. During power up of the GPS sensor,

RT-3020 User Guide 3-18 illustrates the color, format, message, and blink rate of the LEDs for the type of corrections being output. BASE Status

RT-3020S User Guide  The GPS LEDs will blink at the positioning rate selected (1, 2, 5, 10 and 25 Hz). 1 PPS The RT-3020M has the ability to output a

RT-3020 User Guide 3-20 The RT-3020M also can utilize an event input. This input pulse can be used to synchronize any external incident that requir

RT-3020S User Guide Chapter 3 Installation This chapter provides guidance on how the hardware should be installed for optimum performance. Tri-Mode A

RT-3020 User Guide 3-22 There should be an unobstructed view of the sky above a 10-degree elevation mask for optimum GPS satellite visibility for R

RT-3020S User Guide 3-23 The RT-3020S can be installed in a backpack for mobile surveying applications. The sensor should not be placed in a confine

RT-3020 User Guide 3-24 radio signals will not interfere with the transmission of the correction data. The RT-3020 when configured as a reference s

RT-3020S User Guide Figure 8: Good Line of Sight RTK setup Figure 9: Poor Line of Sight RTK setup 3-25

RT-3020 User Guide Communication Ports Connect the supplied LEMO 7-Pin end of the NavCom serial cable (P/N 94-310059-3006) to COM 2 (factory default

RT-3020 User Guide 3-27 GPS Antenna Connector The connector used on the RT-3020 is a TNC female, labeled GPS Ant on the front panel of the sensor as

RT-3020 User Guide i Table of Contents Table of Contents... i Notices...

RT-3020 User Guide 3-28  Where the GPS antenna is exposed to sources of electromagnetic discharge such as lightning, an in-line electrical surge s

RT-3020 User Guide 4-29 Chapter 4 Configuration The RT-3020 GPS sensor has a rich interface and detailed control language, which allows each unit to

RT-3020 User Guide 4-30 Message Rate Description 44 On ChangePacked Almanac 81 On ChangePacked Ephemeris 86 On ChangeChannel Status B0 On ChangeRa

RT-3020 User Guide 4-31 • 86 Channel Status: Provides receiver channel status information and contains the GPS week, GPS Time of Week, NCT-2000D Engi

RT-3020 User Guide 5-32 Chapter 5 Safety Instructions The RT-3020 GPS sensor is designed for precise navigation and positioning using the Global Pos

RT-3020 User Guide 5-33 Maintenance The NavCom equipment can be cleaned using a new lint free cloth that may be moistened, but only with pure alcohol

RT-3020 User Guide 5-34 are aware of the potential hazards and how to avoid them. Other manufacturer’s equipment must be used in accordance with th

RT-3020 User Guide A-35 A GPS Sensor Technical Specifications The technical specifications of this unit are detailed below. NavCom Technology, Inc. i

RT-3020 User Guide A-36 • Superior interference suppression (both in-band & out-of-band) • Patented multipath rejection • 2 separate WAAS/EGN

RT-3020 User Guide B-37 Measurement Performance GPS Receiver Performance • RTK Accuracy (RMS)* Position (H): < 1 cm + 1ppm

RT-3020 User Guide ii Notices RT-3020 GPS Products User Guide P/N 96-310005-3001 Revision A November 2002 Serial Number: Date Delivered: Copy

RT-3020 User Guide A-38 • Dynamics: Acceleration: up to 6g Speed: < 300 m/s* Altitude: < 60,000 ft* • 1PPS Acc

RT-3020 User Guide B-39 Event Marker I/P (RT-3020M Only) 1PPS (RT-3020M Only) • Com Port Functions NCT Proprietary Control,

RT-3020 User Guide B-40 B GPS Antenna Technical Specifications The standard antenna supplied with the RT-3020 GPS sensor is capable of Tri-Mode rece

RT-3020 User Guide Figure 11: Tri-Mode Antenna Dimensions  In order to achieve the greatest level of accuracy, the absolute phase ce

RT-3020 User Guide Glossary-42 Glossary .yym files see meteorological files (where yy = two digit year data was collected). .yyn files see navigati

RT-3020 User Guide Glossary-43 Autonomous positioning (GPS) a mode of operation in which a GPS receiver computes position fixes in real time from sa

RT-3020 User Guide Glossary-44 civilian code see Coarse Acquisition code. Coarse Acquisition code (C/A or Civilian code) the pseudo-random code gen

RT-3020 User Guide Glossary-45 applying these corrections to the satellite data received by the rover. Dilution of Precision (DOP) a class of measur

RT-3020 User Guide Glossary-46 minor axis. GPS positions are computed relative to the WGS-84 ellipsoid. An ellipsoid has a smooth surface, which doe

RT-3020 User Guide Glossary-47 earth at a very high altitude. These distances are used to calculate the point’s position. GMT see Greenwich Mean Tim

RT-3020 User Guide iii (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including inter

RT-3020 User Guide Glossary-48 latitude (lat) the north/south component of the coordinate of a point on the surface on the earth; expressed in angul

RT-3020 User Guide Glossary-49 multipath error a positioning error resulting from interference between radio waves that has traveled between the tran

RT-3020 User Guide Glossary-50 accurately to ensure accurate GPS readings. The phase center height can be calculated by adding the height to an easi

RT-3020 User Guide Glossary-51 pseudo-random noise (prn) a sequence of data that appears to be randomly distributed but can be exactly reproduced. Ea

RT-3020 User Guide Glossary-52 receivers as the receiver generates them, and the roving receivers use the base station readings to differentially co

RT-3020 User Guide Glossary-53 a standard format for Differential GPS corrections used to transmit corrections from a base station to rovers. RTCM al

RT-3020 User Guide Glossary-54 StarFire a set of real-time global orbit and clock corrections for GPS satellites. StarFire equipped receivers are

RT-3020 User Guide iv at no cost to the Buyer, provided that the Buyer returns the defective product to NavCom Technology, Inc. in the original sup

RT-3020 User Guide v Global Positioning System Selective availability (S/A code) was disabled on 2nd May 2000 at 04:05 UTC. The United States governm

RT-3020 User Guide 1-6 Chapter 1 Introduction The RT-3020 GPS sensor delivers unmatched accuracy to the precise positioning community who need a co

RT-3020 User Guide 1-7 terrain. The sensor can be carried in a backpack with the antenna either pole-mounted from the backpack or on a survey pole wi