<6>

GPS quality indication,

 

0

= fix not available,

 

1

= Non-differential GPS fix available,

 

2

= Differential GPS (DGPS) 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>

Differential GPS (RTCM SC-104) data age, number of seconds since last valid RTCM

 

transmission (null if non-DGPS)

<12>

Differential Reference Station ID, 0000 to 1023 (leading zeros transmitted, null if non-DGPS)

4.2.5GPS 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

4.2.6GPS 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, null when not tracking (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 sentences. 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 will be transmitted)

<4>

Latitude hemisphere, N or S

<5>

Longitude, dddmm.mmmm format (leading zeros will be transmitted)

<6>

Longitude hemisphere, E or W

<7>

Speed over ground, 0000.0 to 1851.8 knots (leading zeros will be transmitted)

<8>

Course over ground, 000.0 to 359.9 degrees, true (leading zeros will be transmitted)

<9>

UTC date of position fix, ddmmyy format

<10>

Magnetic variation, 000.0 to 180.0 degrees (leading zeros will be transmitted)

<11>

Magnetic variation direction, E or W (westerly variation adds to true course)

20