Kommetjie Weather Conditions

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Weather Station Technical Description

The current setup.

*Location: Kommetjie, Cape Town, South Africa (Western Cape Peninsula). South 34°08.328' East 018°19.856'.

*Technical description :A calibrated solar powered automatic meteorological data collection platform with onboard measurement/control/processing and storage device,

                                    radio telemetry, GPRS telemetry and direct RS232 connection. Mounted 9m above ground measuring wind speed, wind direction, 

                                    ambient temperature, barometric pressure (calibrated to sea level), solar radiation, rainfall and relative humidity; calculating dew point temperature and  ETo.

*Scan interval: 5-second.

*Data output interval: 1-minute for weather data / 1-hour for ETo .

*Display screen update interval: 1-minute.

*Data upload: Pages are served. (unless network is down)

*Internet connection: ADSL Uncapped

*Instrumentation:

   Campbell Scientific   

CR215 DataLogger (Measurement/Control/Processing and Storage device) Weather and ETo Station, Barometric  Pressure Sensor.

Another CR215 used for controlling irrigation valves based on the main CR215's ETo values.

   R.M. Young    Model 04101 Wind Speed Wind Direction, Model 52203 Rain Gauge, Model 41372LC Temperature Humidity, Model 61205V Barometric Pressure.
   Li-cor    Model 70092 Solar Radiation.
   Apogee    Solar Radiation.

*Software:

   Campbell Scientific LoggerNet    Data logger support software used for data logger communication, programming and data retrieval.
   WeatherQuery 4 - Build 10-02-2009    Graphical display designer (Plot charts, wind roses, labels and web cam photos. Serve web pages. Email reports/alarms.).

Weather Station ChangeLog

Entry 23 16/04/2013
Created a list view of the main page to better display on a smart phone screen Mobile page list view Download size is 159kB.
Entry 22 04/12/2010
Visit the mobile page compact showing the wind direction, wind speed(avg/max) and air temperature for a 10-minute period. Download size is only 12kB for each refresh.
Entry 21 07/11/2010
* The Wind Vane bearings need to be replaced, I will order some on Monday.
Entry 20 20/01/2010
* Calibrated solar radiation and barometric pressure.
Entry 19 23/01/2009
* Replaced wind speed bearings. (Age 8 years)
Entry 18 08/01/2009
* OS / hard drive upgrade. Please note that the 7 and 30 days labels will be incomplete for the next 7 and 30 days respectively.
Entry 17 01/01/2009
* New page layout. New CR215 datalogger. On mobile phones please use Opera Mini.
Entry 16 15/09/2008
* Page update: Added a 7d Rain Label, 24h ETo Label, 7d ETo Label, 30d ETo Label .
Entry 15 30/05/2008
* Page update: Added a 10-minute Gust label, 10-minute Rain label.
Entry 14 25/05/2008
* Page update: Rearranged the wind rose value layout, added a legend.
Entry 13 1/05/2008
* No Data condition: Fixed by installing a new rs232 card. The old usb->rs232 caused system crashes.
Entry 12 04/01/2006 - 01/05/2008
* So few updates: I've been busy doing (non-IT/outside in the sun) stuff in GP/NW for a change, only since 02/2008 back in front of the pc.
Entry 11 04/01/2006
* A new year, a new page.
Entry 10  19/05/2005

*Chart y-axis now scaled manually to predefined values.

*Wind speed converted from m/s to km/h.

*Barometric pressure calibrated to sea level.

Entry 9  01/12/2004

*Implementing a new wind rose type - 16 wind direction sectors, 6 wind speed classes (class 1 = calm) 1-minute samples used.

  Replaced relative humidity element (age 4 years).

  Calibrated weather station.

Entry 8  26/11/2003
*Calibrated weather station
Entry 7 26/11/2003
*Calibrated weather station.
Entry 6 03/04/2003
*Calibrated weather station.
Entry 5 19/02/2003
* A new year, a new page. 
Entry 4 06/08/2002
*Calibrated Weather Station. 
Entry 3 08/04/2002

*Calibrated and logging via radio telemetry - storing two sets of data, 

   storing data onboard - downloading data e.g. daily/weekly/monthly --> write to pc,

      also,

         storing data real-time on pc-->plot graphs-->upload images to website-->confirm daily with SMS/EMail.  

Entry 2 18/01/2002

*Testing two new data loggers.

  The system uses radio telemetry. 

  Calibrated weather station.

Entry 1 27/09/2000 (Weather Station Installation)

*Weather station installation

 

External Links

Visit http://www.inteltronics.co.za - Supplier of research / industrial grade meteorological instrumentation.

Visit http://www.weathersa.co.za - South African Weather main page.

Visit http://www.weathersa.co.za - Composite Radar and Satellite Map for South Africa.

Visit http://www.weathersa.co.za - Sea level synoptic chart for South Africa.

Visit http://www.eumetsat.org - Meteosat.

 

WeatherQuery

Copyright 2000 Frederick le Roux - WeatherQuery - Kommetjie Weather Station - Kommetjie Weerstasie.  (Best viewed on 1280 x 1024).