Garmin DGPS 53 Owner's Manual And Reference Manual - page 17
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Global Positioning System Fix Data (GGA)
$GPGGA,,,,,,,,,,M,,M,,*hh
UTC time of position fix, hhmmss format
Latitude, ddmm.mmmm format (leading zeros will be transmitted)
Latitude hemisphere, N or S
Longitude, dddmm.mmmm format (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 (DGPS) 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
Differential GPS (RTCM SC-104) data age, number of seconds since last valid RTCM
transmission (null if non-DGPS)
Differential Reference Station ID, 0000 to 1023 (leading zeros will be transmitted, null if non-
DGPS)
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
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, null when not tracking (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
sentences. These fields will be null if unused.
Using the
DGPS 53