GM-83 GPS Engine Board User’s Guide Jan 02, 2002 Thailand contact: NavCom Research Co.,Ltd. 84/280 Asiahometown village,Bangkruay-Soinoi rd., Sainoi district, Ampher Sainoi,Nontabure 11150 Phone : 662-9237628-29 Fax : 662-92367629 Email : navcom@navcoms.
GM-83 User’s manual TABLE OF CONTENTS 1. Introduction …………………………………………………………………………..…….. 3 1.1 Overview ………………………………………………………………………………. 3 …………………………………………………………………………..….. 1.3 Technical Specifications ………………..……………………………..……………….. 3 1.2 Features 2. Operational Characteristics 2.1 Initialization …………………………………………………………………………... 4 4 2.2 Navigation …………………………………………………………………………… 5 3. Hardware Interface ……………………………………………….……………………….. 6 3.1 Standard Model 4. Software Interface ……………………………………….
GM-83 User’s manual 1. Introduction 1.1 Overview The HOLUX GM-83 Engine Board is a total solution GPS receiver, designed based on SiRF star II Architecture. This positioning application meets strict needs such as car navigation, mapping, surveying, agriculture and so on. Only clear view of sky and certain power supply are necessary to the unit. GM-83 communicates with other electronic utilities via compatible dual-channel through RS-232 or TTL and saves critical satellite data by built–in memory backup.
GM-83 User’s manual 1.3.4 Performance 1) Tracks up to 12 satellites. 2) Update rate: 1 second. 3) Acquisition time: Reacquisition Hot start Warm start Cold start 0.1 8 38 45 sec, averaged sec. averaged sec. averaged sec. averaged 5~25 0.1 1 meter CEP meters/second. microsecond synchronized GPS time 1 to 5 0.05 meters, typical meters/second, typical < 2.
GM-83 User’s manual 2.2 Navigation After the acquisition process is complete, the GM-83 sends valid navigation information over output channels. These data include: 1) 2) 3) 4) 5) Latitude/longitude/altitude Velocity Date/time Error estimates Satellite and receiver status 2.3 Manufacturing Default: Datum: WGS84. Baud Rate: 4800. Output: GGA, GSA, GSV, RMC or by demand.
GM-83 User’s manual 3. Hardware interface 3.1 Standard Model GM-83 GM-83-A W/ angle MCX connector and standard hole to hole dimension Pin # 1 2 3 4 Name NC VCC_5V VBAT NC J1 connector pin definition: Description No function Regulated 5.0V +/-5% input power, 160mA typical. Battery backup input. 2.5V to 3.3V ,10uA typical.
GM-83 User’s manual 5 PBRESEN 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 GPIO1 GPIO2 GPIO3 GPIO4 GND TXA RXA GND TXB RXB GND GPIO5 GND TIMEMARK NC Manual reset input, ground to reset receiver. Leave floating for normal operation. The minimum plus width is 150 ms reset signal. General purpose I/O pin 1 General purpose I/O pin 2 General purpose I/O pin 3 General purpose I/O pin 4 Ground Port A Serial Transmit Data GPS messages. Port A Serial Receive Data GPS commands. Ground Port B Serial Transmit Data.
GM-83 User’s manual 4. Software Interface The GM-83 interface protocol is based on the National Marine Electronics Association's NMEA 0183 ASC interface specification, which is defined in NMEA 0183, Version 2.2 and the Radio Technical Commission for Maritime Services (RTCM Recommended Standards For Differential Navstar GPS Service, Version 2.1, RTCM Special Committee No.104). 4.
GM-83 User’s manual Value 0 1 2 3 Description 0 Fix not available or invalid GPS SPS Mode, fix valid Differential GPS, SPS Mode, fix valid GPS PPS Mode, fix valid 4.1.2 Geographic Position with Latitude/Longitude(GLL) Table 4-4 contains the values for the following example: $GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C Name Message ID Latitude N/S Indicator Longitude E/W Indicator UTC Position Status Checksum Table 4-4 GLL Data Format Example Units $GPGLL 3723.2475 N 12158.3416 W 161229.
GM-83 User’s manual 3 3D 4.1.4 GNSS Satellites in View (GSV) Table 4-8 contains the values for the following example: $GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71 $GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41 Name Message ID Number of Messages Table 4-8 GSV Data Format Example Units $GPGSV 2 Description GSV protocol header Range 1 to 3 (1) Message Number(1) Satellites in View Satellite ID Elevation Azimuth SNR (C/No) ....
GM-83 User’s manual 4.1.6 Course Over Ground and Ground Speed (VTG) Table 4-10 contains the values for the following example: $GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E Name Message ID Course Reference Course Reference Speed Units Speed Units Checksum Table 4-10 VTG Data Format Example Units $GPVTG 309.62 T M 0.13 N 0.
GM-83 User’s manual 5. Earth Datums 5.1 Earth Datums The following is a list of the GM-83 earth datum index and the corresponding earth datum name: Item Datum Reference Ellipsoid Data name 1 Adindan - Ethiopia Clarke 1880 Data1.dat 2 Afgooye - Somalia Krassovsky Data2.dat 3 Data3.dat Alaska, Conus – North American GRS 1980 1983 4 Argentina South American 1969 Data4.dat 5 International Data5.dat Bahrain – Ain el ABD 1970 6 Bangladesh Everest 1830 Data6.dat 7 Clarke 1880 Data7.
GM-83 User’s manual 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 Paraguay - South American 1969 Philippines Puerto Rico – Virgin Islands Qatar national Qornoq – Greenland (SOUTH) Reunion – Mascarene Islands Regional Mean Rome 1940 – Italy Saudi Arabia- Ain el Abd 1970 Singapore South Africa Kenya, Tanzania- ARC 1960 Thailand 1975 Trinidad, Tobago Venezuela – Provisional American 1956 Venezuela WGS84 Tokyo_Mean Tokyo_Japan Tokyo_Korea Tokyo_Okinawa Albania – S-42(Pulkovo 1942)
GM-83 User’s manual new software to the Receiver, and configure the Receiver operation. See setup.pdf for more information on the use and operation of SiRFdemo software.
