The authors would like to thank the staff of the CSU–CHILL radar for data collection and assistance with interpretation of the observations. Discussions with CSU Atmospheric Science and NCAR/RAF personnel, as well as with Gary Achtemeier, David Atlas, Louis Bjostad, Thomas Holtzer, Scott Isard, Steve Miller, Alexander Ryzhkov, Terry Schuur, Jim Wilson, and Dusan Zrnic, were invaluable to this work. Gwo-Jong Huang and V. N. Bringi of CSU Electrical Engineering provided assistance with the scattering model. Steve Nesbitt and Kyle Wiens of CSU Atmospheric Science assisted with some of the figures. Sounding data were obtained from the University of Wyoming and NEXRAD imagery came from NCAR. MODIS imagery was obtained from NASA. The CSU– CHILL radar facility is funded by the National Science Foundation (ATM-0118021) and Colorado State University.
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