ashtech DG14, Reference Manual

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160 DG14 and DG16 Board & Sensor Reference Manual
If $PASHS,SUI, OFF is sent the usage indicator in the SAT message will be U for
used or - for not used. If $PASHS,SUI,ON is sent the usage indicator in the SAT
message will be U for used or one of the letters listed in Table 6.53 in the SAT
column.
Table 6.53. MCA Good/Bad Flags and SAT Messages When SUI is ON
MCA good/
bad Flag
SAT Description
24 U Used and position computed
23 U Used and position not computed
22 - RESERVED
21 M Satellite NOT used because of low elevation
20 S Satellite NOT used because the pseudo-range is not settled (transient is not
over)
19 H Satellite NOT used because marked 'unhealthy' in ephemeris
18 B Satellite NOT used because of bad URA (or some accuracy problem indicated in
navigational data)
17 Z Satellite NOT used because marked 'unhealthy' in almanac
16 D Satellite NOT used because differential corrections are old or invalid
15 J Satellite NOT used because big code outlier was detected
14 R Satellite NOT used because RAIM or some other algorithm detected a pseudo-
range bias
13 I Satellite NOT used because satellite disabled by external command SVP,USP)
12 L Satellite NOT used because Signal To Noise Ratio is less than Mask
11 G Satellite NOT used because it's possibly a ghost satellite
10 V Satellite NOT used because computed satellite coordinates are suspicious
09 N Satellite NOT used because satellite true number unknown (for modes, where we
need the true satellite number
08 K Satellite NOT used because it was disabled by RTK engine (N/A in DG16)
07 P Satellite NOT used because no full range is available
02 O Satellite NOT used because of some other case
01 E Satellite NOT used because no navigational data (ephemeris) is available
DEFAULT SETTING
SUI— 0