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Your search keyword '"Politovich, M."' showing total 13 results
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13 results on '"Politovich, M."'

1. Meteorological conditions associated with the ATR72 aircraft accident near Roselawn, Indiana on 31 October 1994

Author

Marwitz, J., Politovich, M., Bernstein, B., Ralph, F., Neiman, P., Ashenden, R., and Bresch, J.

Subjects
Indiana -- Natural history, Aircraft accidents -- Analysis, Meteorology -- Observations, Business, Earth sciences
Abstract

An ATR72 commuter aircraft crashed near Roselawn, Indiana, on 31 October 1994 killing all 68 people on board. Available weather data, including those from a Next Generation Radar, a radar wind profiler, a Geostationary Operational Environmental Satellite, and pilot reports of icing have been examined in combination with analysis fields from the Rapid Update Cycle model and forecast fields from the Pennsylvania State University/National Center for Atmospheric Research MM5 numerical model. Synthesis of this information provides a relatively complete and consistent picture of the ambient meteorological conditions in the region of the ATR72 holding pattern at [approximately]3.1 km above mean sea level. Of particular interest is the evidence that these conditions favored the development of supercooled drizzle drops within a strong frontal zone, as indicated by cloud-top temperatures of -10 [degrees] to -15 [degrees] C, weak radar reflectivity, and strong, vertical wind shear within the cloud and warm front.

Published
1997

2. Benchmarking In-Flight Icing Detection Products for Future Upgrades

Author

Politovich, M. K, Minnis, P, Johnson, D. B, Wolff, C. A, Chapman, M, Heck, P. W, and Haggerty, J. A

Subjects
Meteorology And Climatology
Abstract

This paper summarizes the results of a benchmarking exercise conducted as part of the NASA supported Advanced Satellite Aviation-Weather Products (ASAP) Program. The goal of ASAP is to increase and optimize the use of satellite data sets within the existing FAA Aviation Weather Research Program (AWRP) Product Development Team (PDT) structure and to transfer advanced satellite expertise to the PDTs. Currently, ASAP fosters collaborative efforts between NASA Laboratories, the University of Wisconsin Cooperative Institute for Meteorological Satellite Studies (UW-CIMSS), the University of Alabama in Huntsville (UAH), and the AWRP PDTs. This collaboration involves the testing and evaluation of existing satellite algorithms developed or proposed by AWRP teams, the introduction of new techniques and data sets to the PDTs from the satellite community, and enhanced access to new satellite data sets available through CIMSS and NASA Langley Research Center for evaluation and testing.

Published
2004

4. Contribution to CCN Workshop report from University of Wyoming group

Author

Rogers, D. C and Politovich, M. K

Subjects
Instrumentation And Photography
Abstract

The group's CCN counter is described. It is a static, horizontal, parallel plate thermal gradient diffusion chamber. Examples of the application of the CCN are presented and include the CCN spectra measured during the winter of 1978-79 near Elk Mountain, Wyoming. Comparisons of droplet concentrations derived from upwind CCN spectra are covered.

Published
1981

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