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
<2> Latitude, ddmm.mmmm format (leading zeros will
be transmitted)
<3> Latitude hemisphere, N or S
<4> Longitude, dddmm.mmmm format (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 (DGPS) fix available
<7> Number of satellites in use, 00 to 12 (leading zeros
will be transmitted)
<8> Horizontal dilution of precision, 1.0 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> Differential GPS (RTCM-SC104) data age, number
of seconds since last valid RTCM transmission
(null if non-DGPS)
<12> Differential Reference Station ID, 0000 to 1023
(leading zeros will be transmitted, null if non-DGPS)
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, 1.0 to 99.9
<5> Horizontal dilution of precision, 1.0 to 99.9
<6> Vertical dilution of precision, 1.0 to 99.9
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