twisted.positioning.nmea.GPGGAFixQualities(Values)
class documentationtwisted.positioning.nmea
View Source
(View In Hierarchy)
The possible fix quality indications for GPGGA sentences.
Class Variable | INVALID_FIX | The fix is invalid. |
Class Variable | GPS_FIX | There is a fix, acquired using GPS. |
Class Variable | DGPS_FIX | There is a fix, acquired using differential GPS (DGPS). |
Class Variable | PPS_FIX | There is a fix, acquired using the precise positioning service (PPS). |
Class Variable | RTK_FIX | There is a fix, acquired using fixed real-time kinematics. This means that there was a sufficient number of shared satellites with the base station, usually yielding a resolution in the centimeter range. This was added in NMEA 0183 version 3.0. This is also called Carrier-Phase Enhancement or CPGPS, particularly when used in combination with GPS. |
Class Variable | FLOAT_RTK_FIX | There is a fix, acquired using floating real-time kinematics. The same comments apply as for a fixed real-time kinematics fix, except that there were insufficient shared satellites to acquire it, so instead you got a slightly less good floating fix. Typical resolution in the decimeter range. |
Class Variable | DEAD_RECKONING | There is currently no more fix, but this data was computed using a previous fix and some information about motion (either from that fix or from other sources) using simple dead reckoning. Not particularly reliable, but better-than-nonsense data. |
Class Variable | MANUAL | There is no real fix from this device, but the location has been manually entered, presumably with data obtained from some other positioning method. |
Class Variable | SIMULATED | There is no real fix, but instead it is being simulated. |