g.bartoli

Ok, looking through the Datasheet by myself, maybe I found it at page 16: https://github.com/Tinkerforge/gps-bricklet/raw/master/datasheets/FGPMMOPA6H.pdf

Position Accuracy Without aid:3.0m (50% CEP)

DGPS(SBAS(WAAS,EGNOS,MSAS)):2.5m (50% CEP)

But I do not know how to relate this fixed CEP specification (which seems the best case) with the variable EPE measurement coming from the GPS Bricklet (often I receive about 1.3m, which is surprisingly low)... can I consider them equivalent measures?

Dear TinkerForge,

We recently bought a GPS Bricklet unit and we would like to have some more details about the data received in the callbacks.

We successfully used the coordinate callback as explained here: https://www.tinkerforge.com/en/doc/Software/Bricklets/GPS_Bricklet_C.html#c-c-gps-bricklet

The data contains also the EPE value which we read about here: https://www.nps.gov/gis/gps/WhatisEPE.html

What we did not understand is which confidence interval is used: 50%, 68%, 95%, 99.7?

We need this information to calculate the position covariance (standard deviation) following this approach: https://en.wikipedia.org/wiki/Standard_deviation#Rules_for_normally_distributed_data

Many thanks,

Guido