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Observations (Cloud observations (Overall cloud distribution best been in…
Observations
Cloud observations
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Need to measure cloud amount, type and base for aviation
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LIDAR system sends pulses of laser light upwards and records backscatter from clouds- can detect up to 3 layers
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Types of observations
Satellite data- cloud, wind and temp
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Upper air data- radiosondes, aircraft data
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Weather stations
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Ideal site: flat site away from buildings, trees or steep ground- provides data representative of wider area
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Main measurements: temp, humidity, wind, rainfall, pressure, clouds and present weather
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Wind measurements
Ideally, no large obstacles within 300m to affect wind
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Radiosondes
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Measures: temp, humidity, pressure
Balloon-borne, from surface to 25km
In past, position determined from radar reflection or manual tracking w/ theodolite
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