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Polarization Signature in Micro-Wave Humidity Sounder Window Channels

Title: Polarization Signature in Micro-Wave Humidity Sounder Window Channels.
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Name(s): Chen, Xu, author
Zou, Xiaolei, professor directing thesis
Ellingson, Robert G., committee member
Liu, Guosheng, committee member
Department of Earth, Ocean and Atmospheric Sciences, degree granting department
Florida State University, degree granting institution
Type of Resource: text
Genre: Text
Issuance: monographic
Date Issued: 2014
Publisher: Florida State University
Place of Publication: Tallahassee, Florida
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: Microwave Humidity Sounders (MHS) onboard NOAA-15, -16, -17, -18, -19 and EUMETSAT MetOp-A, -B provide radiance measurements at a single polarization state at any of the five observed frequencies. Microwave Humidity Sounder (MWHS) onboard FengYun-3 (FY-3) satellite has a unique instrument design and provides dual polarization measurements at 150 GHz. In this study, the MWHS polarization signal is investigated using observed and modeled data. It is shown that the quasi-polarization brightness temperatures at 150 GHz display a scan angle dependent bias. Under calm ocean conditions, the polarization difference at 150 GHz becomes non-negligible when the scan angle varies from 10 to 45 degrees and reaches a maximum when the scan angle is about 30 degrees. Also, the polarization state is sensitive to surface parameters such as surface wind speed. Under clear-sky conditions, the differences between horizontal and vertical polarization states at 150 GHz increase with decreasing surface wind speed. Therefore, the polarization signals from the cross-track scanning microwave measurements at window channels contain useful information of surface parameters. What is more, cloud liquid water is also proved to be a non-ignorable factor reducing the difference between horizontal and vertical polarization states at 150 GHz. Also, the availability of dual polarization measurements allows a one-to-one conversion from the antenna brightness temperature to sensor brightness temperature if there exit a cross-polarization spill-over.
Identifier: FSU_migr_etd-8755 (IID)
Submitted Note: A Thesis submitted to the Department of Earth, Ocean, and Atmospheric Science in partial fulfillment of the requirements for the degree of Master of Science.
Degree Awarded: Spring Semester, 2014.
Date of Defense: March 18, 2014.
Keywords: MWHS, Polarization, Remote Sensing, Surface Properties
Bibliography Note: Includes bibliographical references.
Advisory Committee: Xiaolei Zou, Professor Directing Thesis; Robert G. Ellingson, Committee Member; Guosheng Liu, Committee Member.
Subject(s): Earth sciences
Oceanography
Atmospheric sciences
Geophysics
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_migr_etd-8755
Owner Institution: FSU

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Chen, X. (2014). Polarization Signature in Micro-Wave Humidity Sounder Window Channels. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-8755