[Therion] Multiple fixes for the same point

[Philippe Vernant]

I will, but I’m using GPS everyday for my job, and I wouldn’t rely to much on a calibration of a handheld device, except if the calibration is in fact some kind of baseline processing on the code signal with data from a broadcasted nearby continuous station.

Phil



> On 12 Sep 2017, at 9:34 AM, Martin Sluka via Therion <therion at speleo.sk> wrote:
> 
> Check that application features and check it in real situations. You’ll be surprised, I’m sure.
> 
> m.s.
> 
>> 12. 9. 2017 v 8:28, Philippe Vernant via Therion <therion at speleo.sk>:
>> 
>> The problem, is that you cannot do a calibration fo a GPS since it will depend on the satellite constellation which change all day long even if you don’t move. So calibration of a GPS is a no no!
>> If you use accurate GPS measurements, either baseline measurement, of PPP post processing (but you need a GPS slightly more expensive that the regular handheld ;-) ) you can have an accuracy of a few millimetres. So the std-dev should always be given explicitly for GPS.
> 
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