Ct3: Combined Measurement/Position Data (Format 3) - ashtech DG16 Reference Manual

Table 7.4. $PASHR,CT2 Data String (Continued)
Binary Type
double [full_phase4]
double
[smooth_rng4]
short [checksum]
Total bytes: 18*number of satellites in the message + 8 (80 for 4 satellites)

CT3: Combined Measurement/Position Data (Format 3)

$PASHS,RAW,CT3,c1,s2,[f1]
This command enables or disables the combined measurement and position data
message format 3, 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,CT3,[c1]
This command queries for a combined raw data message in the CT3 data structure.
This message contains elements derived from the MCA and PBN messages.
c1 is the optional port designator for the response. If a port is not specified, the
receiver sends the response to the current port.
$PASHR,CT3
This message is not output unless the receiver is tracking at least one satellite. The
CT3 message contains an adjusted receive time (the time at which the data was
received) with satellite PRN numbers and channel assignments in association with
full carrier phase measurements, smoothed pseudo ranges, and doppler
measurements. This message contains data for a maximum of three satellites. If
the receiver is tracking nine satellites, three CT3 messages are output. If the
receiver is tracking more than nine satellites, four CT3 messages are output. The
message is output in the format:
$PASHR,CT3,<Format 3 Data String + Checksum>
192
Bytes
8 Full carrier measurements in cycles as defined in the MCA
message
8 Smoothed pseudo-range measurement, derived from raw
range data and smoothing as defined in the MCA message
2 The checksum is calculated by breaking the structure into
shorts, adding them together, and taking the least
significant 16 bits of the result
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