ashtech DG16 - CT1: Combined Measurement;Position Data (Format 1)

188 DG14 and DG16 Board & Sensor Reference Manual
CT1: Combined Measurement/Position Data (Format 1)
$PASHS,RAW,CT1,c1,s2,[f1]
This command enables or disables the combined measurement and position data
message format 1, where c1 is port A, B or C (optional port), s2 is ON or OFF, and
f1 is the optional numeric output interval setting supporting a range of 0.05 to 999
seconds, depending on the measurement update rate option installed.
$PASHQ,CT1,[c1]
This command queries for a combined raw data message in the CT1 data structure,
which contains elements derived from the MCA and PBN messages.
long 4
The raw accumulated carrier phase (cycles * 2
16
). This phase
reading shows jumps due to rollover of the long variable.
This repeats for each channel.
long 4
Measured sub 1 ms code phase (chips*2
16
).
This repeats for each channel.
int 2 Measure of the quality of code phase (absolute value of tracking
loop error).
This repeats for each channel.
int 2 Signal-to-noise ratio from the carrier loop.
This repeats for each channel.
int 2 Peak value of 10 ms sums of Q from the carrier loop since the
last report.
This repeats for each channel.
int 2 • LBS bit0 = TRUE: Preamble found: data count and sample
count are good.
• LBS bit1 = TRUE: TOW decoded for this PRN.
This repeats for each channel.
int 2 Number of data bits since the beginnign of the preamble.
This repeats for each channel.
int 2 Number of epochs since the last bit edge.
This repeats for each channel.
long 4 GPS time of week for the satellite PRN.
This repeats for each channel.
short [checksum] 2 Checksum.
Total bytes = (32 * number of channel tracking satellites) + 10
Table 7.2. $PASHR,CMB Data String (Continued)
Binary Type Bytes Content