NDLI: Spectral Behavior of the Ocean Surface Backscatter and the Atmospheric Boundary Layer at C- and Ku-band under High wind and Rain Conditions

Content Provider	IEEE Xplore Digital Library
Author	Fernandez, D.E. Chang, P. Carswell, J. Contreras, R. Chu, T.
Copyright Year	2006
Description	Author affiliation: Office of Res. & Applic., Massachusetts Univ., MA (Fernandez, D.E.; Chang, P.)
Abstract	During the NOAA/NESDIS 2005 Hurricane Season (HS2005) and the 2006 Winter Experiment, the University of Massachusetts (UMass) installed two instruments on the NOAA N42RF WP-3D research aircraft: the Imaging Wind and Rain Airborne Profiler (IWRAP) and the Simultaneous Frequency Microwave Radiometer (SFMR). IWRAP is a dual-band (C- and Ku), dual-polarized pencil- beam airborne radar that profiles the volume backscatter and Doppler velocity from rain and that also measures the ocean backscatter response. It simultaneously profiles along four separate incidence angles while conically scanning at 60 RPM. SFMR is a C-band nadir viewing radiometer that measures the emission from the ocean surface and intervening atmosphere simultaneously at six frequencies. It is designed to obtain the surface wind speed and the column average rain rate. Both instruments have previously been flown during the 2002, 2003 and 2004 hurricane seasons. For the HS2005, the IWRAP system was modified to implement a raw data acquisition system. The importance of the raw data system arises when trying to profile the atmosphere all the way down to the surface with a non- nadir looking radar system. With this particular geometry, problems arise mainly from the fact that both rain and ocean provide a return echo coincident in time through the antenna's main lobe. This paper shows how this limitation has been removed and presents initial results demonstrating its new capabilities to derive the atmospheric boundary layer (ABL) wind field within the inner core of hurricanes to much lower altitudes than the ones the original system was capable of, and to analyze the spectral response of the ocean backscatter and the rain under different wind and rain conditions.
Starting Page	1871
Ending Page	1874
File Size	192230
Page Count	4
File Format	PDF
ISBN	0780395107
DOI	10.1109/IGARSS.2006.483
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-07-31
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Oceans Sea surface Backscatter Rain Hurricanes Instruments Frequency Microwave radiometry Atmospheric measurements Sea measurements
Content Type	Text
Resource Type	Article

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