Nmea 0183 Message Formats; Alm - Gps Almanac Data; Table 21: Description Of The Alm Message - Fugro OmniSTAR 8300HP User Manual

OmniSTAR 8300HP User Manual

NMEA 0183 Message Formats

In this section each message is described in more detail.
ALM – GPS Almanac Data
The ALM message identifies the GPS week, SV health and
contains the almanac for one satellite. One sentence per satellite,
up to a maximum of 32.
$GPALM,1,1,03,698,00,6ae6,1d,779f,fdef,a10d68,6469a6,7c1f62,
5f5839,*43
Field Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Table 21: Description of the ALM message.

Issue 1.0, 05/03
Description
Total number of ALM sentences for this cycle
Sentence sequence number
SV PRN number, 01 to 32
GPS week number
SV health status
Eccentricity
Almanac reference time
Inclination angle
Rate of right ascension
Root of semi-major axis
Argument of perigee
Longitude of ascension node
Mean anomaly
A f0, clock parameter
A f1, clock parameter
38