Windmeter on platform
mar05
The windmeter is mounted on the platform. It
comes down from the platform on a fiber into jon hagens windmeter
box. This box supplies a analog meter output. It also presents the
voltages for velocity, direction to front panel bnc's and to rear
panel bnc's that are read by a sbc computer to log the info.
see: Dana's
notes on the windmeter (oct08)
The logging of the data:
- The program running on the sbc is called wind_data.c. It is
located in /home/aoui/develop/sbc/wind_data.c.
- The mjd in the output file comes from this computers clock
- A tcl/tk program called newwindmeter.tcl runs on the
obsdisplay computer. It's code is in
/export/wind/newwindmeter.tcl (on obsdisplay)ter.c.
- It reads the data, displays the info on the monitor to
the left of observer2 and it writes the ascii data to the
daily logfile in /export/wind. The time stamp in the file
hhmmss comes from obsdisplay's clock.
- old version: An display program called windmeter.c runs on
the obsdisplay computer. It's source code is in
/home/aoui/display/wind/windmeter.c. It uses jeff's sockLib
routines to connect to the sbc wind_data.c program. It reads
the data, displays the info on the monitor to the left of
observer2 and it uses the log_msg() routine
(/home/aoui/lib/loglib.c) to write the data to the disk file.
The time stamp in the file hhmmss comes from obsdisplay's
clock.
- It looks like the jd time stamp in the datafiles drifts off
(the sbc clock is probably not too stable). The hhmmss time
stamp looks accurate since obsdisplay is running ntpd.
Idl code:
The idl code to manipulate the wind data is :
- /share/pkg/rsi/local/phil/wind/
- There are a set of routines to read in a months worth of
logfiles and stores them in an idl.sav file. These save files
are currently in /share/gx260s1dat1/wind (a usb disk).
- A set of routines to generate monthly/yearly plots.. see the
readme file in teh idl/wind directory.
wind
page with monitor data:
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