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Proceedings Paper

Intercomparison of C2n data derived from VHF and UHF radars
Author(s): Frank D. Eaton; William H. Hatch; John R. Hines; Jeffrey O. Johnson; Wayne Flowers; Glenn Hoidale; Elaine Santantonio
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Paper Abstract

Results of backscatter, or radar reflectivity, from VHF (50 MHz) and UHF (404 MHz) profiling radars are inter-compared. Both systems are operated as clear-air Doppler radars providing vertical profiles of horizontal and vertical wind, but the 50 MHz system is also calibrated for the refractive index structure parameter (Cn2) that is directly proportional to the backscatter. The method of calibration is outlined. Both radars employ phased array antennas with collinear-coaxial (CO-CO) elements. The VHF radar system transmits a peak power of 250 kW and has an antenna area of 15,600 m2 while the UHF system transmits 7 kW peak power and has an antenna size of 170 m2. Performance characteristics and operating modes are presented for both systems. Results presented include simultaneous comparisons of `shapes' of Cn2 profiles as well as comparisons between different beams applying appropriate statistical tests. A method to empirically calibrate the UHF radar is discussed with recommendations for long-term use. Measurements from the radar systems are also compared to the Aeronomy Laboratory's turbulence model. Utility of the radar results with various optical and acoustic derived turbulence values is discussed.

Paper Details

Date Published: 1 August 1992
PDF: 7 pages
Proc. SPIE 1688, Atmospheric Propagation and Remote Sensing, (1 August 1992); doi: 10.1117/12.137892
Show Author Affiliations
Frank D. Eaton, U.S. Army Atmospheric Sciences Lab. (United States)
William H. Hatch, U.S. Army Atmospheric Sciences Lab. (United States)
John R. Hines, U.S. Army Atmospheric Sciences Lab. (United States)
Jeffrey O. Johnson, U.S. Army Atmospheric Sciences Lab. (United States)
Wayne Flowers, Science and Technology Corp. (United States)
Glenn Hoidale, Science and Technology Corp. (United States)
Elaine Santantonio, Science and Technology Corp. (United States)

Published in SPIE Proceedings Vol. 1688:
Atmospheric Propagation and Remote Sensing
Anton Kohnle; Walter B. Miller, Editor(s)

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