NMEA-GN-GSA

Description:

Standard NMEA: GNSS DOP and active satellites.

Configuration:

• NMEA-GN-GSA_GNSS for combined (average) output from both receivers

  • Operation and navigation modes are taken from the “best” receiver

  • The list of satellite IDs contains the union of satellites used by GNSS1 and GNSS2

  • The PDOP, HDOP and VDOP are the averages of the respective values of the two receivers

• NMEA-GN-GSA_GNSS1 for output from GNSS 1 receiver

  • This is the standard NMEA GSA for GNSS1.

• NMEA-GN-GSA_GNSS2 for output from GNSS 2 receiver

  • This is the standard NMEA GSA for GNSS2.

• NMEA-GN-GSA_FUSION for output from Fusion

  • Operation and navigation modes are taken from the “best” receiver

  • The list of satellite IDs contains the union of satellites used by GNSS1 and GNSS2

  • The PDOP, HDOP and VDOP are the averages of the respective values of the two receivers

Notes:

• These messages does not contain any information that would let one tell them apart. Do not enable more than one of these in the same port.

• This message is according to NMEA 0183 v4.11 (and erratas).

• This message uses the “GN” talker ID and NMEA v4.11 satellite numbering.

Example messages (one epoch):

$GNGSA,A,3,04,06,07,09,11,16,20,30,,,,,0.98,0.49,0.85,1*0A\r\n
$GNGSA,A,3,67,68,69,76,77,78,83,84,,,,,0.98,0.49,0.85,2*0A\r\n
$GNGSA,A,3,02,03,07,08,13,15,25,26,,,,,0.98,0.49,0.85,3*09\r\n
$GNGSA,A,3,09,14,24,26,27,28,33,,,,,,0.98,0.49,0.85,4*04\r\n

Message fields: