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6 Technical Specications GPS170
6.3.6 Format of the NMEA 0183 String (RMC)
The NMEA String is a sequence of 65 ASCII characters starting with the `$GPRMC' character and ending with
the characters CR (carriage return) and LF (line-feed). The format is:
$GPRMC,hhmmss.ss,A,bbbb.bb,n,lllll.ll,e,0.0,0.0,ddmmyy,0.0,a*hh<CR><LF>
The letters printed in italics are replaced by ASCII numbers or letters where as the
other characters are part of the time string. The groups of characters as dened below:
$
Start character, ASCII Code 24h
sending with one bit accuracy at change of second
hhmmss.ss the current time:
hh
hours
(00..23)
mm
minutes
(00..59)
ss
seconds
(00..59, or 60 while leap second)
ss
fractions
of seconds
(1/10 ; 1/100)
A
Status (A = time data valid)
(V = time data not valid)
bbbb.bb
latitude of receiver position in degrees
leading signs are replaced by a space character (20h)
n
latitude, the following characters are possible:
`N'
north of equator
`S'
south d. equator
lllll.ll
longitude of receiver position in degrees
leading signs are replaced by a space character (20h)
e
longitude, the following characters are possible:
`E'
east of Greenwich
`W'
west of Greenwich
ddmmyy
the current date:
dd
day of month
(01..31)
mm
month
(01..12)
yy
year of
the century
(00..99)
a
magnetic variation
hh
checksum (EXOR over all characters except `$' and `*')
<CR>
Carriage Return, ASCII Code 0Dh
<LF>
Line Feed, ASCII Code 0Ah
28
Date: 4th November 2013
GPS170SV
Summary of Contents for GPS170SV
Page 1: ...MANUAL GPS170SV GPS Receiver Eurocard 4th November 2013 Meinberg Radio Clocks GmbH Co KG ...
Page 2: ......
Page 12: ...Page 8 3 GPS170SV Features 3 7 3 IRIG Standard Format 8 Date 4th November 2013 GPS170SV ...
Page 13: ...3 7 Time Code optional Page 9 3 7 4 AFNOR Standard Format GPS170SV Date 4th November 2013 9 ...
Page 42: ...Page 38 7 The program GPSMON32 38 Date 4th November 2013 GPS170SV ...