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Scale-size calculations, energy dissipation rates and height coverage of a 404 MHz wind profiler at IMD, Pune

Joshi, RR and Narendra, S and Damle, SH and Pant, GB (2009) Scale-size calculations, energy dissipation rates and height coverage of a 404 MHz wind profiler at IMD, Pune. Current Science, 96 (9). pp. 1176-1181.

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Abstract

The 404 MHz wind profiler at the India Meteorological Department, Pune, is the first wind profiler of this frequency in India. Therefore, it is necessary to achieve maximum possible height to get valuable data. UHF wind profilers have better height and time resolution, which enables us to make reliable and correct estimations of the wind at various altitudes at regular spacing above the observational site. The height coverage of the profiler depends upon various factors like power aperture product and the operating wavelength vis-avis scale sizes available in the atmosphere. In this study, daily averaged second moment data archived during clear-air conditions have been used to estimate the scale-size parameters in terms of eddy dissipation rates, which explicitly indicates that more height coverage of a profiler depends only on the availability of the scale sizes in the atmosphere to which the radar is sensitive, and that in turn depends on where in the inertial subrange the operating wavelength resides. Power aperture product at various C2n values has been estimated. This note explicitly explains why the height coverage of the wind profiler at Pune is limited to 6-8 km under clear-air conditions.

Item Type: Article
Additional Information: Copyright of this article belongs to Indian Academy of Science
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 18 Feb 2015 11:10
Last Modified: 18 Feb 2015 11:10
URI: http://moeseprints.incois.gov.in/id/eprint/1772

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