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Identification and refinement of martian surface mineralogy using factor analysis and target transformation of near-infrared spectroscopic data

Thomas, Nancy H. and Bandfield, Joshua L. (2017) Identification and refinement of martian surface mineralogy using factor analysis and target transformation of near-infrared spectroscopic data. Icarus, 291 . pp. 124-135. ISSN 0019-1035. http://resolver.caltech.edu/CaltechAUTHORS:20170504-072614094

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Abstract

Factor analysis and target transformation techniques were applied to the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) spectral dataset to identify spectral endmembers, reduce noise, and automate image analysis. These techniques allow for rapid processing of images and identification of weak spectral signals. We have applied the automated technique to over 3000 CRISM images and successfully identified endmembers including phyllosilicates (e.g., serpentine, nontronite, and illite), sulfates (e.g., gypsum), carbonates (e.g., magnesite) and hydrated silica. To test these techniques, factor analysis and target transformation were applied to all available full spectral resolution covering the Nili Fossae region from 1.7 to 2. 6 µm data to identify the occurrence of Mg-carbonate in the region. We have also applied the factor analysis and target transformation as a noise reduction algorithm, which also allows for improved results from other common image analysis techniques, including spectral ratios and index maps.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1016/j.icarus.2017.03.001DOIArticle
http://www.sciencedirect.com/science/article/pii/S0019103516301075PublisherArticle
Additional Information:© 2017 Elsevier Inc. Received 26 April 2016, Revised 12 January 2017, Accepted 1 March 2017, Available online 3 March 2017. We would like to thank the Mars Reconnaissance Orbiter and CRISM science and operations teams for targeting, collecting, and archiving the datasets used here. JMARS, Davinci, and GDAL software was used for data processing and analysis. Funding for this project was in part provided by Mars Data Analysis Program grant NNX14AM33G. Thanks to Elena Amador for helpful discussions. We thank Tim Glotch and an anonymous reviewer for their detailed comments.
Funders:
Funding AgencyGrant Number
NASANNX14AM33G
Subject Keywords:Mars; Surface; Data reduction techniques; Image processing; Spectroscopy; Mineralogy
Record Number:CaltechAUTHORS:20170504-072614094
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20170504-072614094
Official Citation:Nancy H. Thomas, Joshua L. Bandfield, Identification and refinement of martian surface mineralogy using factor analysis and target transformation of near-infrared spectroscopic data, Icarus, Volume 291, 15 July 2017, Pages 124-135, ISSN 0019-1035, https://doi.org/10.1016/j.icarus.2017.03.001. (http://www.sciencedirect.com/science/article/pii/S0019103516301075)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77181
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:04 May 2017 16:08
Last Modified:04 May 2017 16:08

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