NavCom LAND-PAK Rev.N - Manual (Page 171)

Technical Reference Manual Rev. N
Blk = All; Blu = IOP w/Internal Radio ; Red = IOP & LBM ; Grn = Engine only
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NMEA Output Messages
$GPALM
This output message reports orbital data (almanac) for the specified GPS satellite, and is in
compliance with NMEA-0183 Standards version 3.0.
Output Format:
$GPALM,total,message,prn,week,health,eccentricity,reftime,inclination,ascension,
axis,perigee,node,anomaly,F0clock,F1clock*checksum
Field# Field Name Description
F1 total Total number of messages (01 to 32)
F2 message Message number (01 to 32)
F3 PRN GPS satellite PRN number (01 to 32)
F4 week GPS week number (4 digits)
F5 health SV health (ASCII hex, 2 bytes)
F6 eccentricity Eccentricity (ASCII hex, 4 bytes)
F7 reftime Almanac reference time (ASCII hex, 2 bytes)
F8 inclination Inclination angle (ASCII hex, 4 bytes)
F9 ascension Rate of right ascension (ASCII hex, 4 bytes)
F10 axis Root of semi-major axis (ASCII hex, 2 bytes)
F11 perigee Argument of perigee (ASCII hex, 6 bytes)
F12 node Argument of perigee (ASCII hex, 6 bytes)
F13 anomaly Mean anomaly (ACSII hex, 6 bytes)
F14 F0clock F0 clock parameter (ASCII hex, 3 digits)
F15 F1clock F1 clock parameter (ASCII hex, 3 digits)
F16 Checksum
Example: $GPALM,32,1,01,1423,00,35BF,7B,1F38,FD5B,A10D8B,78C23F,B7E3C6,
379706,080,001*36