GPGRS
GPS Range Residuals
Example: $GPGRS,024603.00,1,-1.8,-2.7,0.3,,,,,,,,,*6C
Where:
GRS Range residuals
024603 UTC time of associated GGA fix
1 Mode 0 = residuals used in GGA
1 = residuals calculated after GGA
-1.8 Residual (meters) of satellite 1 in solution
-2.7 Residual (meters) of satellite 2 in solution
0.3 Residual (meters) of satellite 3 in solution
*6C Checksum
Unused entries are blank, the order matches the PRN number in the GSA sentence