Dual GPS using SkyTraQ receivers

The last days I got my tablet, built a tabletholder in front of the steering wheel and started some tests. I can report, that most things seem to work very fine:

  • Position rtk-fix takes only a few seconds after powering the receivers plus some extra seconds for a working heading and roll (second receiver); all together it alway took less than one minute
  • Heading and Roll looked very stable without big “jumps”… In NavSpark forum, they give these accuracy for heading:
    2 meter separation: 0.07 degree
    1 meter separation: 0.13 degree
    50 cm separation: 0.27 degree
  • A big problem (I think its a know bug?) is the use of a large antenna offset which I need as the antennas are placed left and right on the cabin roof (124 cm seperated). I get big jumps in position in the view of AOG (I think it jumps exectly the configured 62cm in antenna offset). Below is a short video (I know there are some graphical bugs in my self built version of AOG) were you see this and one older post about this problem:

Tomorrow I will try my setup on seeding some grass. To avoid the problem with antenna offset I will try to use implement offset instead. I think that should work OK for now.
For long time use I will think about reposition one of the antennas (to the center of tractor). Then I will only have halve of the accuracy in heading and roll…