ashtech GG Surveyor, Reference Manual

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122 GG Surveyor GPS+GLONASS Reference Manual
$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:
$PASHR,SAG,(structure)
where Table 6.37 defines the measurement structure.
Table 6.37: SAG (GLONASS Almanac) Structure
Field Bytes Content
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
A
(days in range 1 to 1461)
float 4
Correction to inclination (semicircles)
float 4
Longitude of first ascension node (semicircles)
float 4
Reference time of longitude of first node (seconds)
float 4
Argument of perigee (semicircles)
float 4 aƒ
0
correction to mean value (43200 sec) of Draconic period
(seconds)
float 4 aƒ
1
=
d(aƒ
0
)/dt (sec/sec)
float 4 Satellite clock offset (seconds)
unsigned short 2 Checksum computed by breaking the structure into shorts, adding
them together, and taking the least significant 16 bits of the
result.
total characters 44
ε
A
n
∆
i
A
n
λ
A
n
t
A
λ
n
ω
A
n
∆
T
A
n