180 G12 OEM Board & Sensor Reference Manual
The SAT message displays more information on unused satellites. Used satellites are indicated with
a U and unused satellites, by default, are indicated with a -. If you enable the satellite usage
indicator, SUI, switch, a variety of flags display instead of a - to indicate the reason why the
respective satellite is not used in the solution.
c6 Indicates whether the locked satellite is used in
position computations:
• U—Used, position not computed
• A dash (-) indicates that the satellite is not being
used in position computations
• M—Satellite NOT used because of low elevation
• S—Satellite NOT used because the pseudorange
is not settled (transient is not over)
• H—Satellite NOT used because marked
'unhealthy' in ephemeris
• B—Satellite NOT used because of bad URA (or
some accuracy problem indicated in navigational
data)
• Z—Satellite NOT used because marked
'unhealthy' in almanac
• D—Satellite NOT used because differential
corrections are old or invalid
• J—Satellite NOT used because big code outlier
was detected
• R—Satellite NOT used because RAIM or some
other algorithm detected a pseudorange bias.
• I—Satellite NOT used because SV disabled by
external command SVP,USP)
• L—Satellite NOT used because Signal To Noise
Ratio is less than Mask
• G—Satellite NOT used because it's possibly a
ghost satellite
• V—Satellite NOT used because computed
satellite coordinates are suspicious
• N—Satellite NOT used because satellite true
number unknown (for modes, where we need the
true SV number
• K—Satellite NOT used because it was disabled
by RTK engine (N/A in G12)
• O—Satellite NOT used because of some other
case
• E—Satellite NOT used because no navigational
data (ephemeris) is available
*hh Checksum 2-character hex
Table 4.105. $PASHR,SAT Message Format (Continued)
Field Description Range
G12RevD.book Page 180 Tuesday, April 2, 2002 4:33 PM
To Next Page
Loading...