University of Helsinki
Meteorological data at Kumpula.

Local standard time is used, EET (UTC+2).

Mast:
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About 200 m SW of the KUM weather radar.
All files have the station indicator "Kum" followed by date (YYYYMMDD).
Ending of "a" or "b" for temperature and radiation sensor data;
Numbers after T tell the height in meters of the temperature sensor,
P0 = Photosynthetically active radiation (PAR) downward, P1 = PAR upward
(reflected from the ground), S denotes short-wave, and L long-wave
radiation. 
Wind from sonic anemometers "w1", "w2", "w3", and "w4" (4, 8, 16, and 32 m)
above local ground.

Physicum:
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About 30 m N from KUM weather radar.

CSV-files labeled according to the date.
Output of Vaisala MILOS 520 automatic weather station on the roof of
Physicum. 
Includes pressure, temperature, humidity, wind, and radiation
sensor data. 
The more standard radiation values in the "Mast" data should be used.

KumYYYYMMDDp.txt have precipitation data of the Ott Pluvio weighing
gauge, without wind shield on the roof platform. The original file has
the weight of the collector in the unit 0.01 mm of precipitation with
4 minutes interval, and this has been used to calculate intensity "dm", and
when positive to sum in the precipitation amount "P". 
Because of the instrument internal filtering the time of the record
is about 4 minutes later than the actual event, only the filtered time
series of the instrument is available.
Despite the filtering the instrument has a known feature to get false
accumulation during clear weather, especially if the difference of 
consecutive measurements is used and wind is strong.
Some additional information (mostly in Finnish):
http://www.helsinki.fi/~mleskine/sateet/ottia.html

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e-mail contacts:
Matti.Leskinen@helsinki.fi
Dmitri.Moisseev@helsinki.fi
Sabine.Goeke@helsinki.fi

Matti Leskinen 2010-10-28