ashtech DG16 Reference Manual page 219

Table 7.8. $PASHR,MCA Data String (Continued)
Field
unsigned char
[goodbad]
unsigned char
[polarity_known]
unsigned char [ireg]
unsigned char
[qa_phase]
double [full phase]
double [raw_range]
long [doppler]
Raw Data Commands
Bytes
1 Indicates the quality of the position measurement:
• 24—Used and position computed.
• 23—Used, position not computed
• 22—RESERVED
• 21—Satellite NOT used because of low elevation
• 20—Satellite NOT used because the pseudo-range is not settled
(transient is not over)
• 19—Satellite NOT used because marked 'unhealthy' in ephemeris
• 18—Satellite NOT used because of bad URA (or some accuracy
problem indicated in navigational data)
• 17—Satellite NOT used because marked 'unhealthy' in almanac
• 16—Satellite NOT used because differential corrections are old or
invalid
• 15—Satellite NOT used because big code outlier was detected
• 14—Satellite NOT used because RAIM or some other algorithm
detected a pseudo-range bias.
• 13—Satellite NOT used because SV disabled by external
command SVP,USP)
• 12—Satellite NOT used because Signal To Noise Ratio is less
than Mask
• 11—Satellite NOT used because it's possibly a ghost satellite
• 10—Satellite NOT used because computed satellite coordinates
are suspicious
• 09—Satellite NOT used because satellite true number unknown
(for modes, where we need the true SV number
• 08—Satellite NOT used because it was disabled by RTK engine
(N/A in DG16)
• 02—Satellite NOT used because of some other case
• 01—Satellite NOT used because no navigational data
(ephemeris) is available
1 This number is either 0 or 5, 0 meaning satellite is just locked, and 5
meaning the beginning of the first frame has been found
1 Signal-to-noise measurement for the satellite observation
1 Not used; always zero
8 Full carrier phase measurements in cycles. Not available unless
carrier phase option is installed
8 Raw range to satellite in seconds, i.e., receive time - raw range =
transmit time
4 -4
Doppler (10 Hz)
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