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Hydrometeor Detection Using Cloudsat--An Earth-Orbiting 94-GHz Cloud Radar ROGER MARCHAND
 

Summary: Hydrometeor Detection Using Cloudsat--An Earth-Orbiting 94-GHz Cloud Radar
ROGER MARCHAND
Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington
GERALD G. MACE
Department of Meteorology, University of Utah, Salt Lake City, Utah
THOMAS ACKERMAN
Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington
GRAEME STEPHENS
Department of Atmospheric Sciences, Colorado State University, Fort Collins, Colorado
(Manuscript received 16 March 2007, in final form 26 August 2007)
ABSTRACT
In late April 2006, NASA launched Cloudsat, an earth-observing satellite that uses a near-nadir-pointing
millimeter-wavelength radar to probe the vertical structure of clouds and precipitation. The first step in
using Cloudsat measurements is to distinguish clouds and other hydrometeors from radar noise. In this
article the operational Cloudsat hydrometeor detection algorithm is described, difficulties due to surface
clutter are discussed, and several examples from the early mission are shown. A preliminary comparison of
the Cloudsat hydrometeor detection algorithm with lidar-based results from the Cloud-Aerosol Lidar and
Infrared Pathfinder Satellite Observation (CALIPSO) satellite is also provided.
1. Introduction
Clouds play a major role in earth energy and water

  

Source: Ackerman, Thomas P. - Department of Atmospheric Sciences, University of Washington at Seattle

 

Collections: Geosciences; Environmental Sciences and Ecology