ashtech GG Surveyor Reference Manual page 108

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