Summary
NMEA 0183 standard GNSS Satellites in View.

Syntax
$GPGSV,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>,<14>,<15>,<16>,<17>,<18>,
             <19>*hh<CR><LF>

Fields
<1>    Total number of GSV sentences (1 to 3 for internal GPS if WeatherStation)
<2>    Sentence number (1, 2, or 3)
<3>    Total number of satellites in view
<4>    Satellite ID number, 1st SV
<5>    Elevation degrees, 0 to 90, to the nearest degree, 1st SV
<6>    Azimuth, degrees True, to the nearest degree, 1st SV
<7>    SNR (C/No) 00-99 dB-Hz, 1st SV (null field if satellite not tracked)
<8>    Satellite ID number, 2nd SV
<9>    Elevation degrees, 0 to 90, to the nearest degree, 2nd SV
<10>   Azimuth, degrees True, to the nearest degree, 2nd SV
<11>   SNR (C/No) 00-99 dB-Hz, 2nd SV (null field if satellite not tracked)
<12>   Satellite ID number, 3rd SV
<13>   Elevation degrees, 0 to 90, to the nearest degree, 3rd SV
<14>   Azimuth, degrees True, to the nearest degree, 3rd SV
<15>   SNR (C/No) 00-99 dB-Hz, 3rd SV (null field if satellite not tracked)
<16>   Satellite ID number, 4th SV
<17>   Elevation degrees, 0 to 90, to the nearest degree, 4th SV
<18>   Azimuth, degrees True, to the nearest degree, 4th SV
<19>   SNR (C/No) 00-99 dB-Hz, 4th SV (null field if satellite not tracked)

Summary
NMEA 0183 standard GNSS DOP and Active Satellites.

Syntax
$GPGSA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>,<14>,<15>,<16>,<17>
              *hh<CR><LF>

Fields
<1>       M = Manual, forced to operate in 2D or 3D. A = Automatic, allowed to automatically switch 2D/3D
<2>       1 = Fix not available, 2 = 2D fix, 3 = 3D fix
<3>       ID numbers of satellite used in solution
<4>       ID numbers of satellite used in solution
<5>       ID numbers of satellite used in solution
<6>       ID numbers of satellite used in solution
<7>       ID numbers of satellite used in solution
<8>       ID numbers of satellite used in solution
<9>       ID numbers of satellite used in solution
<10>     ID numbers of satellite used in solution
<11>     ID numbers of satellite used in solution
<12>     ID numbers of satellite used in solution
<13>     ID numbers of satellite used in solution
<14>     ID numbers of satellite used in solution
<15>     Positional Dilution of Precision (PDOP).  This field is null unless the GPS has a 3D fix.
<16>     Horizontal Dilution of Precision (HDOP). Null unless the GPS has either a 2D fix or a 3D fix.
<17>     Vertical Dilution of Precision (VDOP).  This field is null unless the GPS has a 3D fix.

Summary
NMEA 0183 standard Geographic Position – Latitude/Longitude.

Syntax
$GPGLL,<1>,<2>,<3>,<4>,<5>,<6>,<7>*hh<CR><LF>

Fields
<1>    Latitude, to the nearest .0001 minute
<2>    N if field <1> is North Latitude S if field <1> is South Latitude
<3>    Longitude, to the nearest .0001 minute
<4>    E if field <3> is East Longitude W if field <3> is West Longitude
<5>    UTC of position, in the form hhmmss
<6>    Status:
          A = data valid, V = data invalid
<7>    Mode indicator:
          A = Autonomous mode
          D = Differential mode
          E = Estimated (dead reckoning) mode
          M = Manual input mode
          S = Simulator mode
          N = Data not valid

Summary
NMEA 0183 standard GPS Fix Data.

Syntax
$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>,<14>*hh<CR><LF>

Fields
<1>    UTC of position, in the form hhmmss
<2>    Latitude, to the nearest .0001 minute
<3>    N if field <2> is North Latitude S if field <2> is South Latitude
<4>    Longitude, to the nearest .0001 minute
<5>    E if field <4> is East Longitude W if field <4> is West Longitude
<6>    GPS quality indicator:
           0 = Fix not available or invalid
           1 = GPS SPS Mode, fix valid
           2 = Differential GPS, SPS Mode, fix valid
           3 = GPS PPS Mode, fix valid
           4 = Real Time Kinematic (RTK)
           5 = Float RTK
           6 = Estimated (dead reckoning) Mode
           7 = Manual Input Mode
           8 = Simulator Mode
<7>    Number of satellites in use, 0-12
<8>    Horizontal dilution of precision (HDOP)
<9>    Altitude relative to mean-sea-level (geoid), meters (to the nearest whole meter)
<10>  M
<11>  Geoidal separation, meters (to the nearest whole meter).