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
format. 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 X, Y, Z coordinates
in meters are displayed next. Then, 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_ecef
RTM3205 reply:
CURRENT REFERENCE POSITION ECEF = AVG X: -2707225.0 m Y: -4208361.2 m Z: +3941650.2 m
RMSPDOP: 2.4 AvgCnt: 28800
gpsstat
This command allows you to query the status of the GPS Subsystem. During normal operation,
the system polls the GPS Subsystem every 10 seconds. The results of this poll are used to steer the
system clock and are saved to a log file. This command parses and formats the data contained therein
and prints this fixed-length string having these fields:
LKSTAT TFOM = ? YEAR DOY HH:MM:SS LS LF S NN AGC EFCDAC C/No FLTR FLTS
Where:
LKSTAT is the tracking status of the GPS Subsystem, either LOCKED or NOTLKD.
TFOM = ? is a value between 3 and 9 and indicates clock accuracy.
A detailed explanation of TFOM is in
Appendix A - TFOM
.
YEAR
is the year of the UTC timestamp of the most recent update.
DOY
is the day-of-year of the UTC timestamp of the most recent update.
HH:MM:SS is the hour, minute and second of the UTC timestamp of the most recent update.
LS
is the current number of leap seconds difference between the UTC and GPS timescales
(18 at the time of this writing).
LF
is the future (at the next UTC midnight) number of leap seconds difference between the
UTC and GPS timescales (18 at the time of this writing).
S
is the Signal Processor State, one of 0 (Acquiring), 1 (GPS Locking), 2 (GPS Locked), 9
(Warming Up).
NN
is the number of GPS satellites being tracked, 0 to 12.
AGC
is the RF front-end Automatic Gain Control 8-bit DAC value. Typical range is 125 to
200, with larger numbers implying higher gain being used.
EFCDAC is the system oscillator Electronic Frequency Control 20-bit DAC value, 0 to 1048575
with larger numbers implying higher oscillator frequency. Typical range is 320000 to
680000.
Содержание RTM3205
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