ashtech GG Surveyor, Reference Manual

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90 GG Surveyor GPS+GLONASS Reference Manual
$PASHR,ION
The response message has the format:
$PASHR,ION,struct
where Table 6.16 outlines struct.
Table 6.16: Ionosphere Data Format
Type Size Content
float 4 a
0
ionospheric parameter (seconds).
float 4 a
1
ionospheric parameter (sec. per semicircle).
float 4
a
2
ionospheric parameter (sec. per semicircle
2
).
float 4
a
3
ionospheric parameter (sec. per semicircle
3
).
float 4 b
0
ionospheric parameter (seconds).
float 4 b
1
ionospheric parameter (sec. per semicircle).
float 4
b
2
ionospheric parameter (sec. per semicircle
2
).
double 8
b
3
ionospheric parameter (sec. per semicircle
3
)
double 8 A
0
constant (zero-order terms of GPS/UTC polynomial) (sec)
double 8 A
1
constant (first-order terms of GPS/UTC polynomial) (sec/sec)
unsigned long 4 t
ot
reference time for UTC data (seconds)
short 2 W
nt
UTC reference week number
short 2
∆
tLS
delta time due to leap-second (seconds)
short 2
WN
LSF
Week of leap second correction
short 2 DN day of leap second correction
short 2 DtLSF Delta time between GPS and UTC (seconds)
short 2 WN Current GPS week number
unsigned long 4 TOW current time of week in seconds
short 2 bulwn current GPS week number when message was read
(usually same as WN)
unsigned long 4 bultow time of week when message was read (usually same as
TOW) (seconds)