Raw Data Commands 189
Raw Data Commands
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,CT1
This message is not output unless the receiver is tracking at least one satellite. The
CT1 message contains an adjusted receive time (the time at which the data was
received) with satellite PRN numbers and channel assignments in association with
smoothed pseudo ranges. This message contains data for a maximum of six
satellites. If the receiver is tracking more than six satellites, two CT1 messages are
output. The message is output in the format:
$PASHR,CT1,<Format 1 Data String + Checksum>
Table 7.3 outlines the data string format.
Table 7.3. $PASHR,CT1 Data String
Binary Type Bytes Content
Long [adj_rcvtime] 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
char [sv_no] 1 The number of satellites in the message (1...6).
char [remainder] 1 The number of satellites remaining for the current epoch; i.e.,
since the CT1 message can contain data for a maximum of six
satellites, if the receiver is tracking eight satellites, two are
remaining
char [chn1] 1 Channel (1...14)
char [prn1] 1 Satellite PRN number
double
[smooth_rng1]
8 Smoothed pseudo-range measurement, derived from raw range
data and smoothing as defined in the MCA message
char [chn2] 1 Channel (1...14)
char [prn2] 1 Satellite PRN number
double
[smooth_rng2]
8 Smoothed pseudo-range measurement, derived from raw range
data and smoothing as defined in the MCA message
char [chn3] 1 Channel (1...14)
char [prn3] 1 Satellite PRN number
double
[smooth_rng3]
8 Smoothed pseudo-range measurement, derived from raw range
data and smoothing as defined in the MCA message
char [chn4] 1 Channel (1...14)
char [prn4] 1 Satellite PRN number
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