ashtech DG16 Reference Manual page 211

contains data for a maximum of four satellites. If the receiver is tracking eight
satellites, two CT2 messages are output. If the receiver is tracking more than eight
satellites, three CT2 messages are output. The message is output in the format:
$PASHR,CT2,<Format 2 Data String + Checksum>
Table 7.4 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]
char [chn2]
char [prn2]
double [full_phase2]
double
[smooth_rng2]
char [chn3]
char [prn3]
double [full_phase3]
double
[smooth_rng3]
char [chn4]
char [prn4]
Raw Data Commands
Table 7.4. $PASHR,CT2 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...4)
1 The number of satellites remaining for the current epoch;
i.e., since the CT2 message can contain data for a
maximum of four satellites, if the receiver is tracking eight
satellites, four 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
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
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
1 Channel (1...14)
1 Satellite PRN number
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