GPS 15 Technical Specifications (P/N 190-00266-00) Rev. BPage 144.2.4 GPS DOP and Active Satellites (GSA)$GPGSA,<1>,<2>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<4>,<5>,<6>*hh<1> Mode, M = manual, A = automatic<2> Fix type, 1 = not available, 2 = 2D, 3 = 3D<3> PRN number, 01 to 32, of satellite used in solution, up to 12 transmitted (leading zeros will betransmitted)<4> Position dilution of precision, 0.5 to 99.9<5> Horizontal dilution of precision, 0.5 to 99.9<6> Vertical dilution of precision, 0.5 to 99.94.2.5 GPS Satellites in View (GSV)$GPGSV,<1>,<2>,<3>,<4>,<5>,<6>,<7>,...<4>,<5>,<6>,<7>*hh<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 betransmitted)NOTE: Items <4>,<5>,<6>, and <7> repeat for each satellite in view to a maximum of four (4) satellitesper sentence. Additional satellites in view information must be sent in subsequent bursts of NMEA 0183data. These fields will be null if unused.4.2.6 Recommended Minimum Specific GPS/TRANSIT Data (RMC)$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*hh<1> UTC time of position fix, hhmmss format<2> Status, A = Valid position, V = NAV receiver warning<3> Latitude, ddmm.mmmm format (leading zeros will be transmitted)<4> Latitude hemisphere, N or S<5> Longitude, dddmm.mmmm format (leading zeros will be transmitted)<6> Longitude hemisphere, E or W<7> Speed over ground, 000.0 to 999.9 knots (leading zeros will be transmitted)<8> Course over ground, 000.0 to 359.9 degrees, true (leading zeros will be transmitted)<9> UTC date of position fix, ddmmyy format<10> Magnetic variation, 000.0 to 180.0 degrees (leading zeros will be transmitted)<11> Magnetic variation direction, E or W (westerly variation adds to true course)4.2.7 Estimated Error Information (PGRME)$PGRME,<1>,M,<2>,M,<3>,M*hh<1> Estimated horizontal position error (HPE), 0.0 to 999.9 meters<2> Estimated vertical position error (VPE), 0.0 to 999.9 meters<3> Estimated position error (EPE), 0.0 to 999.9 meters4.2.8 Map Datum (PGRMM)The Garmin Proprietary sentence $PGRMM gives the name of the map datum currently in use by the GPSsensor. This information is used by the Garmin MapSource real-time plotting application.$PGRMM,<1>*hh<1> Name of map datum currently in use (variable length field, e.g., “WGS 84”)
