User manual HOLUX GR-271

[. . . ] 1. 2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brief Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. 1 Hardware Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The default communication parameters for NMEA output are 4800 baud, 8 data bits, stop bit, and no parity. NMEA Record GGA GSA GSV RMC Table 2-1 NMEA-0183 Output Messages Description Global positioning system fixed data GNSS DOP and active satellites GNSS satellites in view Recommended minimum specific GNSS data ·2. 2. 1. 1 Global Positioning System Fix Data (GGA) Table 2-2 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 Name Message ID UTC Time Latitude N/S Indicator Longitude E/W Indicator Position Fix Indicator Satellites Used HDOP Example $GPGGA 161229. 487 3723. 2475 N 12158. 3416 W 1 07 1. 0 Table 2-2 GGA Data Format Units Description GGA protocol header hhmmss. sss ddmm. mmmm N=north or S=south dddmm. mmmm E=east or W=west See Table 2-3 Range 0 to 12 Horizontal Dilution of Precision 5 MSL Altitude Units Geoid Separation Units Age of Diff. Station ID Checksum <CR> <LF> Value 0 1 2 3 9. 0 M M 0000 *18 Meters Meters Meters Meters second Null fields when DGPS is not used End of message termination Table 2-3 Position Fix Indicator Description 0 Fix not available or invalid GPS SPS Mode, fix valid Differential GPS, SPS Mode, fix valid GPS PPS Mode, fix valid 2. 2. 1. 2 GNSS DOP and Active Satellites (GSA) Table 2-4 contains the values for the following example: $GPGSA, A, 3, 07, 02, 26, 27, 09, 04, 15, , , , , , 1. 8, 1. 0, 1. 5*33 Name Message ID Mode 1 Mode 2 Satellite Used Satellite Used . . . . . . Table 2-5 Mode 1 Description Manual--forced to operate in 2D or 3D mode 2DAutomatic--allowed to automatically switch 2D/3D Table 2-6 Mode 2 Value 1 2 3 Description Fix Not Available 2D 3D Example $GPGSA A 3 07 02 1. 8 1. 0 1. 5 *33 Table 2-4 GSA Data Format Units Description GSA protocol header See Table 2-5 See Table 2-6 Sv on Channel 1 Sv on Channel 2 . . . . Sv on Channel 12 Position Dilution of Precision Horizontal Dilution of Precision Vertical Dilution of Precision End of message termination Value M A 2. 2. 1. 3 GNSS Satellites in View (GSV) Table 2-7 contains the values for the following example: 6 $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 Message Number Satellites in View Satellite ID Elevation Azimuth SNR (C/No) . . . . Satellite ID Elevation Azimuth SNR (C/No) Checksum <CR> <LF> Example $GPGSV 2 1 07 07 79 048 42 . . . . 27 27 138 42 *71 Table 2-7 GSV Data Format Units Description GSV protocol header Range 1 to 3 Range 1 to 3 degrees degrees dBHz degrees degrees dBHz Channel 1 (Range 1 to 32) Channel 1 (Maximum 90) Channel 1 (True, Range 0 to 359) Range 0 to 99, null when not tracking Channel 4 (Range 1 to 32) Channel 4 (Maximum 90) Channel 4 (True, Range 0 to 359) Range 0 to 99, null when not tracking End of message termination NOTE: Items <4>, <5>, <6> and <7> repeat for each satellite in view to a maximum of four (4) satellites per sentence. Additional satellites in view information must be sent in subsequent sentences. These fields will be null if unused. 2. 2. 1. 4 Recommended Minimum Specific GNSS Data (RMC) Table 2-8 contains the values for the following example: $GPRMC, 161229. 487, A, 3723. 2475, N, 12158. 3416, W, 0. 13, 309. 62, 120598, , *10 Table 2-8 RMC Data Format Name Example Units Description Message ID $GPRMC RMC protocol header UTC Time 161229. 487 hhmmss. sss Status A A=data valid or V=data not valid Latitude 3723. 2475 ddmm. mmmm N/S Indicator N N=north or S=south Longitude 12158. 3416 dddmm. mmmm E/W Indicator W E=east or W=west Speed Over Ground 0. 13 knots Course Over Ground 309. 62 degrees True Date 120598 ddmmyy Magnetic Variation1 degrees E=east or W=west Checksum *10 <CR> <LF> End of message termination 1. SiRF Technology Inc. All "course over ground" data are geodetic WGS84 directions. 2. 2. 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 GR-271 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 7 communication parameters, GR-271 may decode the data correctly to generate accurate messages and save them in battery-back SRAM for later computing. 3. Install GPSViewer. exe from PC to your PDA(Microsoft Pocket PC OS or alike). (1) Install Microsoft ActiveSync to your PC, refer to your Pocket PC manual for installation procedure. The Microsoft ActiveSync will detect your Pocket PC automatically. (3) Double Click the GpsViewer. exe on your PC, then GpsViewer. exe program will install automatically. 8 2. Push "Start""programs" bottom" GPS Viewer" 3. then push "Open GPS" bottom. Select your Com Port (COM 1COM 10) 9 4. Select "GPS Status" to show the satellite diagram like below. 10 4. [. . . ] Optional: GLL, VTG, or SiRF binary Baud rate: 9600, 19200, 38400 bps NMEA Input messages NMEA/SiRF Binary Set altitude, position, date & time, select output messages and rates Interface: H/W: Compact Flash - CF type I S/W: Emulated COM Port 1-8 (Auto Select) Antenna Type: Built in Patch Antenna Minimum signal tracked: -159dBW Dimension: 93. 5×43 ×11 mm Weight : < 34g * The specifications are subject to be changed without notice. * The measurement functions of this GPS CF card are not intended for use in tracking measurements that requires professional or industrial precision. Values produced by this GPS CF card should be considered as reasonable accurate representations only. [. . . ]