NMEA-GP-GST

Description:

Standard NMEA: GNSS pseudorange error statistics.

This message is actually NMEA-GN-GST, as it uses information from all GNSS constellations (GN), not GPS only (GP). However, we publish it as NMEA-GP-GST to maximize compatibility.

Configuration:

• NMEA-GP-GST_GNSS for combined (average) output from both receivers

  • The time is the average between GNSS1 and GNSS2.

  • The RMS value is computed over all the used measurements among both receivers

  • The standard deviation values are computed from the mean of the covariance matrices in ECEF at the mean position between GNSS1 and GNSS2

• NMEA-GP-GST_GNSS1 for output from GNSS 1 receiver

  • This is the standard NMEA GST for GNSS1.

• NMEA-GP-GST_GNSS2 for output from GNSS 2 receiver

  • This is the standard NMEA GST for GNSS2.

• NMEA-GP-GST_FUSION for output from Fusion

  • The time and STD data is from the Fusion solution.

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).

• It uses the “GP” talker ID even though the navigation solution is multi-GNSS.

Example message:

$GPGST,GPGST,114319.60,5.2,0.4,0.3,62.5,0.3,0.4,1.1*68\r\n

Example message with non-standard high-precision fields:

$GPGST,114233.3998,7.1215,2.0198,1.2409,169.6050,1.9992,1.2737,2.7802*6E\r\n

Message fields: