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Research Capacity Building using a new Dual-frequency Airborne Radar System in support of NASA GPM and ACE Ground Validation Experiments University of Wyoming/NASA Johnson Space Center, Glenn Research Center, Science Mission Directorate, Space Technology Mission Directorate

The project will enable, for the first time, profiling dual-frequency radar measurements (above and below the aircraft) in combination with hydrometeor characterization using in situ optical array probes at flight flight level. The beauty of this is that one can actually assess and thus improve the dual-frequency radar algorithms for median particle diameter, precipitation rate and other hydrometeor characteristics: ground truth is provided by measurements at flight level, sandwiched between the dual-frequency reflectivity estimates above and below flight level. The Ka-band (1.2 cm) Profiling Radar (KPR), funded by this project, will be combined with the W-band (0.3 cm) WCR (Wyoming Cloud Radar) whose, profiling capability was funded by a previous NASA EPSCoR grant lead by the same science PI at the University of Wyoming. The signal returned to the radar receiver (radar reflectivity) is attenuated differently

by cloud and precipitation particles at these two frequencies. The basic principle of dual-frequency radar measurements, as used on the NASA GPM (Global Precipitation Measurement) mission, is that the difference in reflectivity between the two radars is a measure of precipitation rate and other cloud properties along the path between the radar and the target. Our measurements will allow the evaluation and improvement of dual-frequency algorithms, not so much for the NASA GPM DPR (dualfrequency radar), but rather for the future NASA ACE (Aerosol. Clouds, and Ecosystems) mission, which will use exactly the same radar pair (Ka and W bands). The platform used for this work in the UW King Air (UWKA) research aircraft. It has been used for many years mainly for NSF-funded projects. The WCR nadir port was funded by a previous NASA EPSCoR grant. The KPR will be mounted on the aircraft’s right wing.

A group of Millersville University students visiting the UW King Air in the OWLeS (Ontario Winter Lake-effect Snow) project in 2014.

Science PI: Dr. Bart Geerts, University Of Wyoming NASA Technical Monitor: Dr. Walt Petersen

A group of Millersville University students visiting the UW King Air in the PECAN project (Plains Elevated Convection At Night) in 2015.

NASA EPSCoR Stimuli 2014-15



EPSCoR Stimuli 2014-15  

NASA Office of Education’s Aerospace Research & Career Development (ARCD) is pleased to release NASA EPSCoR Stimuli, a collection of univers...

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