Message Type 129, BTVEG

Intergraph's NMEA message containing time, GPS latitude and longitude, speed and heading information.

Message format is:

$BTVEG,AVLID,t,llll.llll,a,yyyyy.yyyy,b,ccc,ddd,v,T,T*hh<CR><LF>

Where:

AVLID last 8 digits of modem ID converted to HEX (or up to first non-decimal character in the 8 digits)

t is the time of fix (seconds since midnight)

llll.llll is the position latitude in degrees, minutes and decimal minutes (DDMM.MMMM)

a is N(orth) or S(outh)

yyyyy.yyyy is the position longitude in degrees and decimal degrees (DDDMM.MMMM)

b is E(ast) or W(est)

ccc is the integer horizontal velocity in mph

ddd is the integer heading in degrees (relative to true north)

v is the data validity flag: A = valid current data, B = valid stored data, V = invalid current data, W = invalid stored data

hh is the message checksum

Examples:

$BTVEG,00099599,80452,4915.4124,N,12259.7958,W,0,0,A,T,T*3C