R T M 3 2 0 5 U s e r M a n u a l
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C H A P T E R T H R E E
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R T M 3 2 0 5 U s e r M a n u a l
C O N T R O L A N D S T A T U S C O M M A N D S
Command:
gpsdynmode
RTM3205 reply:
OFF
gpsionoinfo
This command provides the current and previously received GPS ionospheric model coefficients.
Also shown are the week number and time-of-week of the almanac transmissions that contained the
two sets of model coefficients.
Command:
gpsionoinfo
RTM3205 reply:
GPS Ionosphere Model Almanac Parameters:
WN_a = 1890 T_oa = 503808
Alpha0 = +1.676e-08 Alpha1 = +7.451e-09 Alpha2 = -1.192e-07 Alpha3 = -5.960e-08
Beta0 = +1.106e+05 Beta1 = +1.638e+04 Beta2 = -2.621e+05 Beta3 = -6.554e+04
WN_a = 1890 T_oa = 405504
Alpha0 = +1.676e-08 Alpha1 = +7.451e-09 Alpha2 = -1.192e-07 Alpha3 = -5.960e-08
Beta0 = +1.106e+05 Beta1 = +1.638e+04 Beta2 = -2.621e+05 Beta3 = -6.554e+04
gpslastfix
This command provides the last computed GPS position. When tracking four or more satellites, the
GPS Receiver may provide a 3D-position fix, otherwise an overdetermined time-only solution will be
computed. The last-fix position is unaveraged and typically less accurate than the reference posi-
tion, but it does provide a good indication that the receiver is working properly. Position is provided
in latitude, longitude and height above the WGS-84 ellipsoid. PDOP, HDOP, VDOP and TDOP are
also shown. OORCnt is the out-of-range counter which may be non-zero when RTM3205 has been
moved more than 1 km from its previous location without being placed in UNKNOWN mode using
the
setgpsrefpos
command. It could also be non-zero during a GPS system anomaly, in which
case RTM3205 TRAIM algorithms will be operating to maintain the integrity of the system timing.
Command:
gpslastfix
RTM3205 reply:
LAST POSITION FIX = N38d24m54.33s W122d45m10.99s +00003.5 meters
PDOP: 2.90 HDOP: 1.48 VDOP: 2.49 TDOP: 2.03 OORCnt: 0
gpsrefpos
This command displays the current GPS Subsystem reference position. The source of the position,
which is one of UNK (unknown), DYN (dynamic), USR (user entered) or AVG (24 hour average of
GPS fixes) is displayed first. The WGS-84 latitude and longitude in degrees, minutes, seconds format
and the height above the WGS-84 reference ellipsoid in meters follow. Also, the current RMS PDOP
of the average position and the current count of averages are shown. If the reference position source
is not AVG, then these two values will be zero.
Command:
gpsrefpos
RTM3205 reply:
CURRENT REFERENCE POSITION = AVG N38d24m54.30s W122d45m10.95s +00004.1 meters
RMSPDOP: 2.4 AvgCnt: 28800
gpsrefpos_ecef
This command displays the current GPS Subsystem reference position in Earth-Centered Earth-Fixed
Summary of Contents for RTM3205
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