ashtech DG16 Reference Manual page 213

Table 7.5 outlines the data string format.
Binary Type
Long [adj_rcvtime]
char [sv_no]
char [remainder]
char [chn1]
char [prn1]
double [full_phase1]
double
[smooth_rng1]
long [doppler1]
char [chn2]
char [prn2]
double [full_phase2]
double
[smooth_rng2]
long [doppler2]
char [chn3]
char [prn3]
double [full_phase3]
double
[smooth_rng3]
long [doppler3]
short [checksum]
Total bytes: 22*number of satellites in the message + 8 (74 for 3 satellites)
Raw Data Commands
Table 7.5. $PASHR,CT3 Data String
Bytes
4 The time at which the data was received, based on the
following formula using the rcvtime and navt values from the
PBN message: adj_rcvtime = rcvtime - navt/speed of light
1 The number of satellites in the message (1, 2, 3).
1 The number of satellites remaining for the current epoch; i.e.,
since the CT3 message can contain data for a maximum of
three satellites, if the receiver is tracking six satellites, three
are remaining
1 Channel (1...14)
1 Satellite PRN number
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
4 Doppler measurement as defined in the MCA message
1 Channel (1...14)
1 Satellite PRN number
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
4 Doppler measurement as defined in the MCA message
1 Channel (1...14)
1 Satellite PRN number
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
4
Satellite doppler measurement (10
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
Content
-4
Hz) as defined in the
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