Hughes, Christopher Gerald
(2011)
Improved Mapping Accuracy of Planetary Surfaces Using Super-Resolution of Thermal Infrared Data.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
Super-Resolution is the process of obtaining a spatial resolution greater than that of the original resolution of a data source. This can be done through the fusion of original data with an additional source that has the desired resolution. These approaches can either be qualitative for visual appeal, quantitative for data accuracy, or some combination of both. The super-resolution approach offers an alternative to traditional sub-pixel deconvolution identification and provides higher resolution TIR data for Earth and Mars.The Thermal Emission Imaging System (THEMIS) has provided the highest spatial resolution (100 meter / pixel) thermal infrared (TIR) data of the Mars surface to date. These data have enabled the discovery of small-scale compositional units and helped to constrain surface processes operating at these scales. Higher resolution visible instruments have revealed smaller-scale differences, creating a need to detect compositional variability using TIR data at scales below 100 meters. Putative chloride deposits identified on Mars are one such area. These deposits have a unique spectral signature in the TIR and are present within topographic lows. The super-resolution algorithm helped constrain the local mineral assemblages and stratigraphic order. This data reveals that associated phyllosilicate-rich units may be part of a common lithostratigraphic unit with a phyllosilicate-poor ST-2 material.Lunar Lake playa, located ~100 km northeast of Tonopah, Nevada, has been used as an analog site for multiple planetary surfaces and as a vicarious calibration site for Earth-orbiting satellites. As such, the ability to obtain higher resolution data through super-resolution has the potential to improve Earth data and give to insight into the formation of similar environments on other planetary surfaces. Super resolved data show Lunar Lake playa to be more compositionally heterogeneous than previously thought. A gradation of mineralogy exists within the playa, seen in both super-resolved data and in samples collected during fieldwork. The composition of the playa is influenced by the immediate surroundings, with variation existing between the western side of the playa, bounded by basaltic units, and the eastern, bounded by rhyolitic tuff. As the surrounding material weather, different clasts are transported onto the playa, and weather into different mineral assemblies.
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Details
| Item Type: |
University of Pittsburgh ETD
|
| Status: |
Unpublished |
| Creators/Authors: |
| Creators | Email | Pitt Username | ORCID  |
|---|
| Hughes, Christopher Gerald | cgh1@pitt.edu | CGH1 | |
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| ETD Committee: |
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| Date: |
29 June 2011 |
| Date Type: |
Completion |
| Defense Date: |
18 November 2010 |
| Approval Date: |
29 June 2011 |
| Submission Date: |
20 April 2011 |
| Access Restriction: |
5 year -- Restrict access to University of Pittsburgh for a period of 5 years. |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
Dietrich School of Arts and Sciences > Geology and Planetary Science |
| Degree: |
PhD - Doctor of Philosophy |
| Thesis Type: |
Doctoral Dissertation |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
ASTER; Mars; Remote Sensing; super-resolution; THEMIS; TIR |
| Other ID: |
http://etd.library.pitt.edu/ETD/available/etd-04202011-112822/, etd-04202011-112822 |
| Date Deposited: |
10 Nov 2011 19:39 |
| Last Modified: |
15 Nov 2016 13:41 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/7390 |
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