Joe, The decimal should stay in the same place. Places to the left of the decimal will naturally grow as needed to handle the calculated value. Most all NMEA data fields will adjust to handle the data, but different manufacturers handle the details differently. Some will default to all null fields when first turned on: $GPRMC,,,,,,,,,,*XX, while some will fill the fields with zeroes: $GPRMC,000000.00,V,0000.0000,N ---- *XX.
Makes life a little more interesting if you are writing a parsing routine. Randy -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe McElvenney Sent: Tuesday, August 08, 2006 11:03 AM To: [email protected] Subject: [time-nuts] GPS SPD field Hi, Reference a Rockwell Jupiter GPS receiver. Does anyone know if the decimal point in the NMEA $GPRMC 'SPD' ASCII field moves around? At rest it reports 0.000 but it is not obvious whether this format is maintained on the move or expands/contracts to suit. Does it keep the same precision with the most significant digits expanding or not? TIA - Joe _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
