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Dissertation_Loria_final.pdf (47.09 MB)
ETD Abstract Container
Abstract Header
Investigation of Coherent Reflections in GNSS-R using CYGNSS
Author Info
Loria, Eric Andrew
ORCID® Identifier
http://orcid.org/0000-0002-6553-7891
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=osu1595000933377029
Abstract Details
Year and Degree
2020, Doctor of Philosophy, Ohio State University, Electrical and Computer Engineering.
Abstract
Global Navigation Satellite System Reflectometry (GNSS-R) is a remote sensing technique that uses reflected GNSS signals to make measurements of geophysical properties of the Earth's surface. The significant roughness of typical ocean and land surfaces at L-band frequencies commonly result in diffusely scattered GNSS reflections. However, it has been observed that the surfaces of lakes, rivers, wetlands, and other inland water bodies are often sufficiently smooth to produce coherent reflections. Coherent reflections are of particular interest for remote sensing due to their high reflected power, fine spatial resolution, and phase information. Utilizing these reflections enables a unique capability to monitor the global surface water distribution underneath rain, clouds, and dense vegetation. To take full advantage of coherent reflections and best retrieve geophysical information, it is necessary to develop new scattering models, perform simulation studies, and understand how future GNSS-R receivers can be optimized to receive these types of signals. Until now, a comprehensive investigation of this type had not been undertaken. In this work, an electromagnetic scattering model is developed for coherent GNSS reflections over complex scenes with a number of varying surface parameters. The model is utilized to evaluate the accuracy of current water extent retrieval approaches and to propose a novel measurement of wind vector and wave heights from inland waters. Finally, two new algorithms are proposed to improve the science value of coherent GNSS reflections in future GNSS-R instruments.
Committee
Inder Gupta (Advisor)
Andrew O'Brien (Committee Member)
Johnson Joel (Committee Member)
Burkholder Robert (Committee Member)
Pages
196 p.
Subject Headings
Computer Engineering
;
Electrical Engineering
Keywords
GNSS Reflectometry
;
Remote Sensing
;
GPS
;
Coherent Reflection
;
GNSS
;
wind measurement
;
adaptive signal processing
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Citations
Loria, E. A. (2020).
Investigation of Coherent Reflections in GNSS-R using CYGNSS
[Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595000933377029
APA Style (7th edition)
Loria, Eric.
Investigation of Coherent Reflections in GNSS-R using CYGNSS.
2020. Ohio State University, Doctoral dissertation.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=osu1595000933377029.
MLA Style (8th edition)
Loria, Eric. "Investigation of Coherent Reflections in GNSS-R using CYGNSS." Doctoral dissertation, Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595000933377029
Chicago Manual of Style (17th edition)
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Document number:
osu1595000933377029
Download Count:
518
Copyright Info
© 2020, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.