NavCom Sapphire Rev.J User Manual
Page 306

Sapphire Technical Reference Manual Rev. J
306
F10
*CRC
Checksum
Example:
$GNGFA,224229.00,0001.7,0002.9,000.43,000.22,014.4868,000.83,0010.0,SCC*0C
In RTK mode, fields F2, F3, F4, and F5 are zeros. They are correct values since RTK provides
very accurate solutions, beyond the resolution provided by the NMEA standard.
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