Garmin GPS 18 010-00321-56 Manuale Utente

GPS 18 Technical Specifications (190-00307-00)

Rev. D

Page 17

$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 18 PC or LVC; hhmmss.s format for GPS 18-
5Hz

<2>

Latitude, ddmm.mmmm format for GPS 18 PC/LVC; ddmm.mmmmm for GPS 18-5Hz
(leading zeros will be transmitted) 

<3>

Latitude hemisphere, N or S

<4>

Longitude, dddmm.mmmm format for GPS 18 PC/LVC; dddmm.mmmmm for GPS 18-5Hz
(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)

$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

$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 bursts of NMEA 0183
data. These fields will be null if unused.