2 GPS on a single device ?

[Markot]

Hi,

Owning a TD2, I was wondering if connecting a second GPS (GPS head via bluetooth for instance) could make positioning better.

Of course this could work only if the satellite reception is different on the 2 GPS (not the same satellite signals are acquired) and if softwares can manage the 2 GPS data (aggregation) - GPS1 gets satellites 4 & 8, GPS2 1 & 13 => 1, 4, 8 & 13 are acquired, precise positioning is possible.

Cheers.

[stephj]

Nice idea, but unfortunately at the level the data is presented it won't work.

GPS hardware works autonomously and merely presents the data as NMEA sentences to the device via a real or virtual serial com port. The hardware processes the signals from ALL the satellites it can pick up, in order to get the most accurate position. It is not selective, nor can it be made to do so. Microsoft's Intermediate GPS driver tries to smooth out some of the above, but even that can only use one port at a time.

As soon as you have the results from two GPS sources, they invariably return different values, and you immediately run into the question, "Which one is correct?"