[OSM-talk] High-Precision GPS Survey Equipment?

[Alberto Riva]

Hi
I use normally a EGNOS/WAAS submeter DGPS, often for OSM mapping. :-)
My DGPS run really well only in optimal conditions (no satellite
obstruction, multipath, etc.), but I observed that the performance in a
urban environment is normally lower than a "normal" bluetooth GPS based on a
Sirf III or a MTK chipset. I think that one of the keys of these cheaper
GPSs are the better sensitivity than the most expensive DGPS, as well as the
algorithm for calculating the position (myDGPS uses also carrier for
decoding the signal).

Bye
Alberto
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