For a two-credit independent study in Atmospheric and Oceanic Sciences (AOS699) I have written software to log and display wind data from the instruments currently on the roof of the AOS building. My advisor is Prof. Charles R. Stearns.
Software and hardware existed in 1992 to log the same
data on the roof of the AOS building. It was written for an
independent study (AOS699) by James F. Leffel in 1993. A lightning
strike on 05 August, 1996 took this system out of service. Replacement
hardware (a Keithley-Metrabyte DAS-16G A/D board) was purchased
to replace the lightning damaged hardware. The new hardware was
not put in place because of software interface differences, time
I have written software to interface to the new hardware and to
log and display data. My language of choice is Tcl/Tk. A few
of the numerous reasons for my choice include ease of GUI
development, availability for the PC/win95 platform, availability:
free. This data is available immediately on the screen of
the PC located in the 14th floor map bay and is simultaneously available
on the web. Data is also
logged every one minute (adjustable) and log files are rotated daily.
The web server is the same PC which reads the A/D values. It is currently located at the following URL: http://aosdata.meteor.wisc.edu. This site may be in and out of service at any given time, and without warning, as I am in the development stages.
Various other pieces of software have been chosen to make this machine as functional as possible. A list can be found at the following URL: http://www.cs.wisc.edu/~timc/aos699/software-sources.html .
Similarly, a log of progress and problems encountered can be found at this URL: http://www.cs.wisc.edu/~timc/aos699/log.html .
The theory of operation behind this program can be found at the follwoing URL: http://www.cs.wisc.edu/~timc/aos699/theory.html .
|0||thermistor||roof temperature||voltage from bridge||10|
|1||thermistor||street temperature||voltage from bridge||10|
|4||wind vane||wind direction||voltage from bridge||1|
|5||pressure sensing unit||barometric pressure||voltage from bridge||1|
|6||??||supply voltage||1.4V power supply||1|
|7||jumper for zero reference||ground||0||1|
|counter||tipping-bucket rain guage||rain accumulation in 1/100 of an inch||N.O. contact||N/A|
|roof temperature||degrees C, F||thermistor on roof|
|street-level temperature||degrees C, F||thermistor 3m above street|
|station pressure||mb, inches Hg||pressurer sensing unit|
|wind speed||m/sec, mi/hr||anemometer|
|wind direction||degrees reference to north||wind vane|
This document last modified: Wed May 6 12:16:41 CDT 1998 by Tim Czerwonka, firstname.lastname@example.org