NavCom Sapphire Rev.J - Manual (Page 317)

Sapphire Technical Reference Manual Rev. J
317
2.65 NMEAGST (ASCII)
SF-3050 Sapphire SF-3040
Supported Output Rate: OFF ONCE OnChange OnTime
OnChange = when slow nav is completed (1Hz)
OnTime = minimum 1Hz
This output message reports pseudo-range noise statistic information, and is in compliance with
NMEA-0183 Standards version 3.0.
Table 152: GST Message Output Format
Output
Format:
$GPGST,time,rms,majoraxis,minoraxis,orientation,laterr,lonerr,alterr*checksum
Field# Field Name Description
F1 time
UTC time for position fix in hours, minutes, seconds
(hhmmss.ss) (000000.00 to 235959.99)
F2 rms Total RMS standard deviation of ranges inputs to the navigation solution
F3 majoraxis Standard deviation of semi-major axis of error ellipse in meters
F4 minoraxis Standard deviation of semi-minor axis of error ellipse in meters
F5 orientation Orientation of semi-major axis of error ellipse in true north degrees (0 to 180º)
F6 laterr Standard deviation of latitude error in meters
F7 lonerr Standard deviation of longitude error in meters
F8 alterr Standard deviation of altitude error in meters
F9 *CRC Checksum
Example: $GPGST,032746.00,22236.0738,0.0552,0.0355,019.4414,0.0543,0.0368,0.0991*6A