What is the "PPS only" option on the Settings panel > GPS tab > Fix quality filter?
A sample NMEA 0183 sentence for the GPS fix data might be as follows:
Code: Select all
$GPGGA,121505,4807.038,N,01131.324,E,1,08,0.9,133.4,M,46.9,M, , *42
$GPGGA is the NMEA 0183 sentence ID for the GPS fix data.
121505 is the fix taken at 12:15:05 UTC.
4807.038,N is latitude 48° 07.038' N.
01131.324,E is longitude 11° 31.324' E. 1 is the fix quality
The fix quality can have a value between 0 and 3, defined as follows:
• 0 = no fix
• 1 = GPS or standard positioning service (SPS) fix
• 2 = DGPS fix
• 3 = Precise positioning service (PPS) fix // this is the answer
08 is the number of satellites being tracked.
0.9 is the horizontal dilution of position (HDOP).
133.4,M is the altitude, in meters, above mean sea level.
46.9,M is the height of the geoid (mean sea level) above the WGS84 ellipsoid.
(empty field) is the time in seconds since the last DGPS update.
(empty field) is the DGPS station ID number.
*42 is the checksum field.
The NMEA 0183 version 3.0 standard adds the following additional values for the $GPGGA fix quality, which DigiTerra Explorer recognizes:
• 4 = Real-Time Kinematic (RTK) fixed solution
• 5 = Real-Time Kinematic (RTK) float solution
I hope, it will help you for understanding the Fix quality settings filter's options.