I am working at mobile app that uses external GPS module. What I need is to calculate accuracy for the fix from GPGGA command to be able to compare it with my mobile platform's GPS accuracy. Mobile platform uses
the radius of 68% confidence measured in meters as an accuracy.
My question is: what is
Horizontal dilution of position in
GPGGA command? How can I convert it to
the radius of 68% confidence? I used this description for my parser implementation.