[FOSS-GPS] Different of algorithm between using GPS only and combined GPS+Glonass
salimzairmilk at hotmail.fr
Tue Apr 7 01:26:44 PDT 2015
The main difference between GPS and glonass (in term of localization
process) is in the number of parameter to estimate.
In GPS, you have 4 parameters : 3D position and clock bias
In Glonass, you have the same
but when you combine, the clocks of GPS and glonass are not the same, so:
In GPS+Glonass positioning, you have 5 parameter to estimate: 3D position,
GPS clock bias and Glonass clock bias.
Of course, you will have better precision because you use 2 times much more
data (less than two times).
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