Garmin GPS 18x Technical Specifications - Page 21

Global Positioning System Fix Data GGA, GPS DOP and Active Satellites GSA, GPS Satellites in View - pc manual

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4.2.4 Global Positioning System Fix Data (GGA) $GPGGA,,,,,,,,,,M,,M,,*hh UTC time of position fix, hhmmss format for GPS 18x PC or LVC; hhmmss.s format for GPS 18x-5Hz Latitude, ddmm.mmmm format for GPS 18x PC/LVC; ddmm.mmmmm for GPS 18x-5Hz (leading zeros will be transmitted) Latitude hemisphere, N or S Longitude, dddmm.mmmm format for GPS 18x PC/LVC; dddmm.mmmmm for GPS 18x-5Hz (leading zeros will be transmitted) Longitude hemisphere, E or W GPS quality indication, 0 = fix not available, 1 = Non-differential GPS fix available, 2 = Differential GPS (WAAS) fix available, 6 = Estimated Number of satellites in use, 00 to 12 (leading zeros will be transmitted) Horizontal dilution of precision, 0.5 to 99.9 Antenna height above/below mean sea level, -9999.9 to 99999.9 meters Geoidal height, -999.9 to 9999.9 meters Null (Differential GPS) Null (Differential Reference Station ID) 4.2.5 GPS DOP and Active Satellites (GSA) $GPGSA,,,,,,,,,,,,,,,,,*hh Mode, M = Manual, A = Automatic Fix type, 1 = not available, 2 = 2D, 3 = 3D PRN number, 01 to 32, of satellite used in solution, up to 12 transmitted (leading zeros will be transmitted) Position dilution of precision, 0.5 to 99.9 Horizontal dilution of precision, 0.5 to 99.9 Vertical dilution of precision, 0.5 to 99.9 4.2.6 GPS Satellites in View (GSV) $GPGSV,,,,,,,,...,,,*hh Total number of GSV sentences to be transmitted Number of current GSV sentence Total number of satellites in view, 00 to 12 (leading zeros will be transmitted) Satellite PRN number, 01 to 32 (leading zeros will be transmitted) Satellite elevation, 00 to 90 degrees (leading zeros will be transmitted) Satellite azimuth, 000 to 359 degrees, true (leading zeros will be transmitted) Signal to noise ratio (C/No) 00 to 99 dB (leading zeros will be transmitted) Note: Items ,,, and 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. 190-00879-08 GPS 18x Technical Specifications Page 17 Rev. B

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190-00879-08
GPS 18x Technical Specifications
Rev. B
Page 17
4.2.4
Global Positioning System Fix Data (GGA)
$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,<12>*hh<CR><LF>
<1>
UTC time of position fix, hhmmss format for GPS 18x PC or LVC; hhmmss.s format for GPS
18x-5Hz
<2>
Latitude, ddmm.mmmm format for GPS 18x PC/LVC; ddmm.mmmmm for GPS 18x-5Hz
(leading zeros will be transmitted)
<3>
Latitude hemisphere, N or S
<4>
Longitude, dddmm.mmmm format for GPS 18x PC/LVC; dddmm.mmmmm for GPS 18x-5Hz
(leading zeros will be transmitted)
<5>
Longitude hemisphere, E or W
<6>
GPS quality indication, 0 = fix not available, 1 = Non-differential GPS fix available, 2 =
Differential GPS (WAAS) fix available, 6 = Estimated
<7>
Number of satellites in use, 00 to 12 (leading zeros will be transmitted)
<8>
Horizontal dilution of precision, 0.5 to 99.9
<9>
Antenna height above/below mean sea level, -9999.9 to 99999.9 meters
<10>
Geoidal height, -999.9 to 9999.9 meters
<11>
Null (Differential GPS)
<12>
Null (Differential Reference Station ID)
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 will be
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 will be transmitted)
<4>
Satellite PRN number, 01 to 32 (leading zeros will be transmitted)
<5>
Satellite elevation, 00 to 90 degrees (leading zeros will be transmitted)
<6>
Satellite azimuth, 000 to 359 degrees, true (leading zeros will be transmitted)
<7>
Signal to noise ratio (C/No) 00 to 99 dB (leading zeros will be 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.