Re: RTK Base and its accuracy

[Greg Troxel]

Florian Kiera <florian.kiera@logicway.de> writes:

> It takes around 7 1/2 hours to reach the accuracy of 2000 (20cm
> right?). So that seems right compared to the mentions in the ubxtool
> file.
>
> However the position is far from right.
>
> root@rtk-base ~ # ubxtool -p NAV-SVIN -P 20.30 -f /dev/ttyACM0
> UBX-NAV-SVIN:
>   version 0 reserved1[0 0 0] iTOW 208863000 dur 27251
>   meanX 371818636 meanY 75095561 meanZ 511048862
>   meanXHP 33 meanYHP 1 meanZHP -42 reserved2 0 meanAcc 2000
>   obs 27247 valid 1 active 0
>
> Using https://www.oc.nps.edu/oc2902w/coord/llhxyz.htm or any other
> ECEF to LLH translator the values are far off from where we actually
> are.
>
> Results from the website:
> Latitude  : 53.41551   deg N
> Longitude : 11.41833   deg E
>
> "Actual" Position:
>
> Latitude: 53.59931 11.41833

Nowhere in your message did you explain how you are using gpsd, other
than to configure/query the M8P.  I would suggest running gpsd and
seeing if the reported position matches what you think.  If it doesn't,
then you might be doing XYZ->LLh wrong, or it might be an M8P problem.

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