User manual HOLUX GR-87

[. . . ] Manufacturing Default:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 5. Mechanical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5. 1 . GR-87-T0A, GR-87-T0C outline: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5. 2 . GR-87-T0B, GR-87-T0D outline: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5. 3 . [. . . ] The GR-87 utilizes initial data, such as last stored position, date, time and satellite orbital data, to achieve maximum acquisition performance. If significant inaccuracy exists in the initial data, or the orbital data is obsolete, it may take more time to achieve a navigation solution. The GR-87 Auto-locate feature is capable of automatically determining a navigation solution without intervention from the host system. However, acquisition performance can be improved as the host system initializes the GR-87 in the following situation: Moving further than 500 kilometers. Failure of Data storage due to the inactive internal memory battery. 4. 1 NMEA Transmitted Messages The default communication parameters for NMEA output are 4800 baud, 8 data bits, stop bit, and no parity. Table 4-1 NMEA-0183 Output Messages NMEA Record GPGGA GPGLL GPGSA GPGSV GPRMC Description Global positioning system fixed data Geographic position- latitude/longitude GNSS DOP and active satellites GNSS satellites in view Recommended minimum specific GNSS data HOLUX Technology, Inc. 7 1F, No. 30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park) TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux. com. tw Website:www. holux. com. tw GPS Product series With HOLUX, You never lose the way! GPVTG GPMSS GPZDA Course over ground and ground speed Radio-beacon Signal-to-noise ratio, signal strength, frequency, etc. PPS timing message (synchronized to PPS) 4. 1. 1 Global Positioning System Fix Data (GGA) Table 4-2 contains the values for the following example: $GPGGA, 161229. 487, 3723. 2475, N, 12158. 3416, W, 1, 07, 1. 0, 9. 0, M, , , , 0000*18 Table 4-2 GGA Data Format Name Message ID UTC Time Latitude N/S Indicator Longitude E/W Indicator Position Fix Indicator Satellites Used HDOP MSL Altitude (1) Units Geoid Separation(1) Units Age of Diff. Station ID Checksum <CR> <LF> 0000 *18 End of message termination M Example Units Description GGA protocol header hhmmss. sss ddmm. mmmm N=north or S=south dddmm. mmmm E=east or W=west See Table 5-3 Range 0 to 12 Horizontal Dilution of Precision $GPGGA 161229. 487 3723. 2475 N 12158. 3416 W 1 07 1. 0 9. 0 M Meters Meters Meters Meters second Null fields when DGPS is not used (1). Values are WGS84 ellipsoid heights. Table 4-3 Position Fix Indicator Value Description 0 1 2 0 Fix not available or invalid GPS SPS Mode, fix valid Differential GPS, SPS Mode, fix valid HOLUX Technology, Inc. 8 1F, No. 30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park) TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux. com. tw Website:www. holux. com. tw GPS Product series With HOLUX, You never lose the way! 3 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 Table 4-4 GLL Data Format Name Message ID Latitude N/S Indicator Longitude E/W Indicator UTC Position Status Checksum <CR> <LF> Example Units Description GLL protocol header ddmm. mmmm N/S Indicator N N=north or S=south dddmm. mmmm E=east or W=west hhmmss. sss A=data valid or V=data not valid End of message termination $GPGLL 3723. 2475 N 12158. 3416 W 161229. 487 A *2C 4. 1. 3 GNSS DOP and Active Satellites (GSA) Table 4-5 contains the values for the following example: $GPGSA, A, 3, 07, 02, 26, 27, 09, 04, 15, , , , , , 1. 8, 1. 0, 1. 5*33 Table 4-5 GSA Data Format Name Message ID Mode 1 Mode 2 Satellite Used(1) Satellite Used(1) . . . . . . Satellite Used(1) PDOP HDOP VDOP 1. 8 1. 0 1. 5 Example Units Description GSA protocol header See Table 5-6 See Table 5-7 Sv on Channel 1 Sv on Channel 2 . . . . All "course over ground" data are geodetic WGS84 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 HOLUX Technology, Inc. 11 1F, No. 30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park) TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux. com. tw Website:www. holux. com. tw GPS Product series With HOLUX, You never lose the way!Example Units Table 4-10 VTG Data Format Name Message ID Course Reference Course Reference Speed Units Speed Units Checksum <CR> <LF> directions. Description VTG protocol header $GPVTG 309. 62 T M 0. 13 N 0. 2 K *6E km/hr knots degrees Measured heading True degrees Measured heading Magnetic(1) Measured horizontal speed Knots Measured horizontal speed Kilometers per hour End of message termination (1). All "course over ground" data are geodetic WGS84 4. 1. 7 MSK Receiver Signal (MSS) Table 4-11 contains the values for the following example: $GPMSS, 55, 27, 318. 0, 100, *66 Table 4-11 MSS Data Format Name Message ID Signal Strength Signal-to-Noise Ratio Beacon Frequency Beacon Bit Rate Checksum <CR> <LF> Example Units Description protocol header dB SS of tracked frequency SNR of tracked frequency Currently tracked frequency 100 bits per second End of message termination $GPMSS 55 27 318. 0 100 66 MSS dB dB kHz Note ­ The MSS NMEA message can only be polled or scheduled using the MSK NMEA input message. HOLUX Technology, Inc. 12 1F, No. 30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park) TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux. com. tw Website:www. holux. com. tw GPS Product series With HOLUX, You never lose the way! 4. 1. 8 ZDA--SiRF Timing Message Outputs the time associated with the current 1 PPS pulse. Each message will be output within a few hundred ms after the 1 PPS pulse is output and will tell the time of the pulse that just occurred. Table 4-12 contains the values for the following example: $GPZDA, 181813, 14, 10, 2003, 00, 00*4F Table 4-12 ZDA Data Format Name Message ID UTC Time Day Month Year Local zone hour Local zone hour Checksum <CR> <LF> Example Units Description ZDA protocol header Either using valid IONO/UTC or estimated from default leap seconds 01 TO 31 01 TO 12 1980 to 2079 $GPZDA 181813 14 10 2003 00 00 4F knots Offset from UTC (set to 00) Offset from UTC (set to 00) End of message termination 4. 2 RTCM Received Data The default communication parameters for DGPS Input are 9600 baud, 8 data bits, stop bit, and no parity. Position accuracy of less than 5 meters can be achieved with the GPS-82 by using Differential GPS (DGPS) real-time pseudo-range correction data in RTCM SC-104 format, with message types 1, 2, or 9. As using DGPS receiver with different communication parameters, GPS-82 may decode the data correctly to generate accurate messages and save them in battery-back SRAM for later computing. HOLUX Technology, Inc. 13 1F, No. 30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park) TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux. com. tw Website:www. holux. com. tw GPS Product series With HOLUX, You never lose the way! 4. 3 . [. . . ] 20 1F, No. 30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park) TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux. com. tw Website:www. holux. com. tw GPS Product series With HOLUX, You never lose the way! 8) Select "GPS Status" to show the satellite diagram like below, as Fig. 21 1F, No. 30, R&D Road, Hsinchu 300, Taiwan (Hsinchu Science Industrial Park) TEL: 886-3-6687000 FAX:886-3-6687111 E-mail:info@holux. com. tw Website:www. holux. com. tw GPS Product series With HOLUX, You never lose the way! 7. RS-232) GR-87-T0A GR-87-T0B GR-87-T0C GR-87-T0D CMOS 3V CMOS 3V CMOS 3V CMOS 3V 2. 8 2. 8 VCC_IN VCC_IN RF interface Back-up battery (Rechargeable Lithium) Y Y Y Y Power Saving Y Y Y Y RF Connector Type MMCX(180) MMCX(90) MMCX(180) MMCX(90) (CMOS 3V or output voltage (V) 7. 2 Accessories Option Active antenna type. 68011-00 68011-10 68012-00 68012-10 Y Y Cable length 2M Y Y 5M Connector type(MMCX) 90° 180° Y Y Y Y 7. 3 Other Products SiRF START II GPS Receiver: GM-210 Palm Vx GPS Receiver: GM-250. [. . . ]