"QUALITY" Property of GPS object

[MichaelMarlatt]

I am trying to write code that can tell what sort of quality GPS signal is coming in (2d, 3d, DGPS, etc) and I have a hunch this property can help but I can't find out enough about it.  All that's in ArcPad help is that this property returns a Long value, but nothing about what those values represent.

Does anybody know of a place in the documentation that gives more complete information about this?  I'm not sure I have the time right now to experiment and figure out all possible values and what they mean. 

Thanks,

Michael Marlatt

[RolfBroch]

GGA - essential fix data which provide 3D location and accuracy data.

$GPGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47

Where:
     GGA          Global Positioning System Fix Data
     123519       Fix taken at 12:35:19 UTC
     4807.038,N   Latitude 48 deg 07.038' N
     01131.000,E  Longitude 11 deg 31.000' E
     1            Fix quality: 0 = invalid
                               1 = GPS fix (SPS)
                               2 = DGPS fix
                               3 = PPS fix
          4 = Real Time Kinematic
          5 = Float RTK
                               6 = estimated (dead reckoning) (2.3 feature)
          7 = Manual input mode
          8 = Simulation mode
     08           Number of satellites being tracked
     0.9          Horizontal dilution of position
     545.4,M      Altitude, Meters, above mean sea level
     46.9,M       Height of geoid (mean sea level) above WGS84
                      ellipsoid
     (empty field) time in seconds since last DGPS update
     (empty field) DGPS station ID number
     *47          the checksum data, always begins with *


google "nmea 0183 sentence" to get more info

Rolf

[MichaelMarlatt]

Perfect!  Thanks a lot, Rolf.


Cheers,
Michael