JDC Electronic SA Skywatch N.E.W.S. - Manual (Page 5)

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Publication of the measurements
The site meteo.jdc.ch publishes the measurements in graphical form for the 3 preceding
days. This data is sent by the station via GPRS at regular intervals and in a defined daily
time limit.
Since each transmission consumes a large amount of energy, the sending of measurements
for publication can be made different between summer and winter. From the start of
October to the end of March, when the solar panel receives less solar energy, perhaps
none, the daily time limit and the frequency of transmissions can be reduced. These
parameters are defined when the station is set up by using the MeteoLogic software.
Meteorological measurements and transmitter
The Skywatch® N.E.W.S. station acquires and records a series of measurements from
the transmitter every 10 minutes (recommendation of the WMO).
The meteorological transmitter is fitted with an anemometer to measure the mean
direction, the mean speed and the maximum speed of the wind, with a humidity and
temperature sensor and optionally with a pressure sensor.
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General description of operation
Skywatch® N.E.W.S. is an autonomous meteorological station designed for monitoring
the atmospheric conditions at a site.
It is fitted with a meteorological transmitter that measures wind, temperature, relative
humidity, and (as an option) barometric pressure.
Powered from a small solar panel and a battery, the station can easily be installed on
sites that are isolated and have extreme conditions.
Finally, with its GPRS modem, it automatically and periodically transmits its measurements
to the Internet site http://meteo.jdc.ch .
Clock and time synchronization
The station has an internal clock which enables time stamping of the measurements and
synchronization of the measurements and transmissions. At the end of each sending of
data, the clock is resynchronized with the date and time of the GSM network. The local
time zone is also included in this synchronization.