Abstract/Details

Satellite scatterometers: Calibration using a ground station and statistical measurement theory


2003 2003

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Abstract (summary)

Satellite scatterometers have recently gained popularity due to their unique ability to measure global geophysical data on a daily basis. Increased interest in scatterometry mandates improved design and calibration of these instruments. This dissertation presents new techniques for scatterometer calibration and addresses issues related to the design of future instruments and applications. First, the use of a calibration ground station is considered. A new methodology is established for calibration of SeaWinds, NASA's current scatterometer, using a receive-only ground station. Principles of the methodology are implemented, new analysis techniques developed, and important results obtained for instrument timing, frequency, power, position, and pointing. Second, an investigation into methods for calibration of measurement surface location is conducted. Two new approaches are proposed and results of both approaches using SeaWinds data are provided. Third, measurement correlation, a critical issue related to new scatterometer designs, particularly those which significantly oversample the surface is considered. General statistical expressions for measurement correlation are derived and analysis of the effects on data variance is presented. Finally, a new data simulation model is developed to support instrument and application development. New applications require sophisticated models which are general, yet accurate, enabling them to rapidly and easily simulate data from multiple instruments. The model generates data which is statistically equivalent (in a mean and variance sense) to actual scatterometer measurements by separately accounting for the two main forms of variation present in scatterometer data, multiplicative fading and additive noise, and also accounting for correlation between measurements. The model is valuable for a variety of data applications including image generation and high resolution wind retrieval.

Indexing (details)


Subject
Electrical engineering;
Remote sensing
Classification
0544: Electrical engineering
0799: Remote sensing
Identifier / keyword
Applied sciences, Calibration, Ground station, Satellite, Scatterometers
Title
Satellite scatterometers: Calibration using a ground station and statistical measurement theory
Author
Yoho, Peter K.
Number of pages
206
Publication year
2003
Degree date
2003
School code
0022
Source
DAI-B 64/10, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
Advisor
Long, David G.
University/institution
Brigham Young University
University location
United States -- Utah
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3109986
ProQuest document ID
305345780
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305345780
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