ashtech GG Surveyor Reference Manual page 140

$PASHQ,SAG,x
The associated query command is $PASHQ,SAG,x. This command outputs the SAG
almanac data response message on port x, where x is the optional output port.
$PASHR,SAG
The response is a binary message in the form:
where Table 6.37 defines the measurement structure.
unsigned short
total characters
122
$PASHR,SAG,(structure)
Table 6.37: SAG (GLONASS Almanac) Structure
Field Bytes
short 2 Satellite number [1,...,24]
short 2 Satellite GLONASS frequency number [-7,...,24]
short 2 Satellite health 0=bad, 1=good
float 4
Eccentricity
long 4
Reference day number N
float 4
Correction to inclination
float 4
Longitude of first ascension node
float 4
Reference time of longitude of first node
float 4
Argument of perigee
float 4 aƒ
float 4 aƒ
float 4 Satellite clock offset (seconds)
2 Checksum computed by breaking the structure into shorts, adding
them together, and taking the least significant 16 bits of the
result.
44
ε
A
n
A
∆i
ω
A
n
correction to mean value (43200 sec) of Draconic period
0
A
∆T
(seconds)
n
d(aƒ )/dt (sec/sec)
=
0
1
GG Surveyor GPS+GLONASS Reference Manual
Content
(days in range 1 to 1461)
A
(semicircles)
n
λ
A
(semicircles)
n
A
t
(seconds)
λn
(semicircles)