Most of the Meteorological agencies in the world have adopted the GPS based system of observations for use in Radiosonde observations. The GPS technique can be utilized for Pilot Wind observations also. This paper is an attempt to describe the design and development of GPS based Pilot Wind observing system for upper air exploration. The GPS based ground receiver systems being used in RS/RW observations can be used for Pilot Wind observations, hence no separate ground equipment are required. The cost of GPS modules available in the market shows a reducing trend due to competition in the market. Hence, this has become now a viable option for getting accurate Pilot Wind observations in all weather conditions up to height of more than 20 Kms, hence a considerable improvement over the traditional Pilot Wind observation method using optical theodolites
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