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Determination of Cloud Liquid and Precipitable Water Vapor by Ground-Based Microwave Radiometers

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2 Author(s)
Bhattacharya, C.K. ; Radio Science Division, National Physical Laboratory, New Delhi-110 012, India ; Uppal, G.S.

An algorithm has been developed for determining cloud liquid in the monsoon period from ground-based microwave radiometric observations over New Delhi. For cloud liquid measurements, 11- and 17.47-GHz frequencies are used. Calculations show that liquid content changes from 0.1 × 103 to 6.1 × 103 g/m2 and water vapor from 3 × 104 to 6 × 104 g/m2 in the monsoon period over New Delhi. Cloud liquid is found to be highly variable on a time scale and shows poor correlation (0.4) with water vapor content. The average liquid water density of cumulonimbus clouds is obtained as 1.2 g/m3 from these observations.

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:GE-25 ,  Issue: 4 )