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190-00266-01 GPS 15H & 15L Technical Specifications Rev. D
Page 17
4.2.5 GPS DOP and Active Satellites (GSA)
$GPGSA,<1>,<2>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<4>,<5>,<6>*hh<CR><LF>
<1> Mode, M = manual, A = automatic
<2> Fix type, 1 = not available, 2 = 2D, 3 = 3D
<3> PRN number, 01 to 32, of satellite used in solution, up to 12 transmitted (leading zeros are
transmitted)
<4> Position dilution of precision, 0.5 to 99.9
<5> Horizontal dilution of precision, 0.5 to 99.9
<6> Vertical dilution of precision, 0.5 to 99.9
4.2.6 GPS Satellites in View (GSV)
$GPGSV,<1>,<2>,<3>,<4>,<5>,<6>,<7>,...<4>,<5>,<6>,<7>*hh<CR><LF>
<1> Total number of GSV sentences to be transmitted
<2> Number of current GSV sentence
<3> Total number of satellites in view, 00 to 12 (leading zeros are transmitted)
<4> Satellite PRN number, 01 to 32 (leading zeros are transmitted)
<5> Satellite elevation, 00 to 90 degrees (leading zeros are transmitted)
<6> Satellite azimuth, 000 to 359 degrees, true (leading zeros are transmitted)
<7> Signal to noise ratio (C/No) 00 to 99 dB, null when not tracking (leading zeros are transmitted)
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 bursts of NMEA 0183 data.
These fields will be null if unused.
4.2.7 Recommended Minimum Specific GPS/TRANSIT Data (RMC)
$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*hh<CR><LF>
<1> UTC time of position fix, hhmmss format
<2> Status, A = Valid position, V = NAV receiver warning
<3> Latitude, ddmm.mmmm format (leading zeros are transmitted)
<4> Latitude hemisphere, N or S
<5> Longitude, dddmm.mmmm format (leading zeros are transmitted)
<6> Longitude hemisphere, E or W
<7> Speed over ground, 000.0 to 999.9 knots (leading zeros are transmitted)
<8> Course over ground, 000.0 to 359.9 degrees, true (leading zeros are transmitted)
<9> UTC date of position fix, ddmmyy format
<10> Magnetic variation, 000.0 to 180.0 degrees (leading zeros are transmitted)
<11> Magnetic variation direction, E or W (westerly variation adds to true course)
<12> Mode indicator (only output if NMEA 0183 version 2.30 active), A = Autonomous, D =
Differential, E = Estimated, N = Data not valid
4.2.8 Track Made Good and Ground Speed (VTG)
$GPVTG,<1>,T,<2>,M,<3>,N,<4>,K,<5>*hh<CR><LF>
<1> True course over ground, 000 to 359 degrees (leading zeros are transmitted)
<2> Magnetic course over ground, 000 to 359 degrees (leading zeros are transmitted)
<3> Speed over ground, 000.0 to 999.9 knots (leading zeros are transmitted)
<4> Speed over ground, 0000.0 to 1851.8 kilometers per hour (leading zeros are transmitted)
<5> Mode indicator (only output if NMEA 0183 version 3.00 active), A = Autonomous,
D = Differential, E = Estimated, N = Data not valid