I have a question regarding GPS receivers that derive their speed measurements from position i.e. not receivers that uses Doppler effect on the carrier frequency.
My problem is.. I have to determine the accuracy of the GPS measured speed. My theory is that I can use the Positional Dilution of Precision to determine the speed accuracy (roughly). I mean, if the positional measurements is of poor accuracy the derived speed most likely will be of poor accuracy as well, true? (It probably depends on the GPS firmware as well, I don't know anything about the receiver more than I mention here)
The speeds I'm talking about could be from 20 km/h up to 200 km/h at ground level. GPS sampling frequency is at 1 Hz. Surrounding terrain could be of any type (buildings, walls, fields, forests).
I can't do anything about the GPS receiver, I have to live with it.
What do you think? I have Googled some without success. A paper or an article would be perfect to reference to.
Best regards, Robin