NMEA RMC datagram format
The NMEA RMC datagram transfers the time, date, position, course and speed data from a global navigation satellite system (GNSS) receiver.
Format
$--RMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,z.z,ddmmyy,r.r,a,a*hh
Description
1 $—Talker identifier
2 RMCDatagram identifier
3 hhmmss.ssCoordinated Universal Time (UTC) of the current position
4 AStatus
A = The data are valid.
V = The data are not valid.
5 llll.ll,aLatitude North/South (Degrees, minutes and hundredths)
N = North
S = South
6 yyyyy.yy,a: Longitude East/West (Degrees, minutes and hundredths)
W = West
E = East
7 x.xSpeed over ground (knots)
8 z.zCourse over ground (Degrees True)
9 ddmmyyDate
10 r.r,aMagnetic variation, East/West (Degrees)
E = East
W = West
11 aMode indicator
12 *hhChecksum