100 G12 OEM Board & Sensor Reference Manual
STA: Satellite Tracking Status
$PASHQ,STA,[c1]
This command allows you to query for the current satellite tracking status, where
c1 is the optional port designator for the output of the response. If a port is not
specified, the receiver sends the response to the current port.
The response message has a free-form Ashtech proprietary format. Like the MEM
and PAR response messages, the STA response message does not have a header
or message identifier as shown in the following example:
TIME: 00:48:18 UTC
LOCKED: 31 25 29 23 21 15 08 03 01
COUNT: 42 46 47 37 45 48 40 36 49
Table 4.42 defines the parameters.
STB: Measurement Strobe Output
$PASHS,STB,d1,f2,c3
This command allows you to set the output interval, offset and synchronization edge
of the measurement strobe signal. The value of the output interval (d1) is equal to
the number of measurements occurring between outputs of the strobe signal. If
d1is zero, the strobe is disabled. The period is measured in seconds. depends upon
the rate of raw measurement output, which is defined by the set command
$PASHS,RCI. and is defined as (xxxxx*RCI). For example, if RCI is set to 2 and
xxxx is set to 3, then the period is 6 seconds. The a parameter represents either
the rising (R) or falling (F) edge of the strobe. The strobe is synchronized with GPS
time. Default parameters are 1,0.0,R. Accuracy is ±0.5 ms.
period = xxxx (0-9999)
offset = ±yyy.yyyy (-999.9999 to +999.9999) milliseconds
sync edge =
Table 4.42. STA Response Format
Item Description
Time Current UTC time
Locked The PRN numbers of the satellites being tracked
Count The signal count for each tracked satellite
G12RevD.book Page 100 Tuesday, April 2, 2002 4:33 PM
To Next Page
Loading...