Extended Abstract (276K)P1.10
Comparison of in-situ electric field and radar derived parameters for stratiform clouds in Central Florida
Monte Bateman, Universities Space Research Association and NASA/MSFC, Huntsville, AL; and D. Mach, S. Lewis, J. Dye, E. Defer, C. A. Grainger, P. Willis, F. Merceret, D. Boccippio, and H. Christian
Airborne measurements of electric fields and particle microphysics were made during a field program at NASA's Kennedy Space Center. The aircraft, a Cessna Citation II jet, operated by the University of North Dakota, carried six rotating-vane style electric field mills, several microphysics instruments, and thermodynamic instruments. In addition to the aircraft measurements, we also have data from both the Eastern Test Range WSR-74C (Patrick AFB) and the U.S. National Weather Service WSR-88D radars (primarily Melbourne, FL). One specific goal of this program was to try to develop a radar-based rule for estimating the hazard that an in-cloud electric field would present to a vehicle launched into the cloud. Based on past experience, and our desire to quantify the mixed-phase region of the cloud in question, we have assessed several algorithms for integrating radar reflectivity data in and above the mixed-phase region as a proxy for electric field. A successful radar proxy is one that can accurately predict the presence or absence of significant electric fields. We have compared various proxies with the measured in-cloud electric field strength in an attempt to develop a radar rule for assessing launch hazard. Assessment of the best proxy is presented.
Poster Session 1, Poster Session 1
Monday, 10 January 2005, 2:30 PM-4:00 PM
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