Research Papers

Assessment of the spectral stability of Libya 4, Libya 1, and Mauritania 2 sites using Earth Observing One Hyperion

[+] Author Affiliations
Taeyoung Choi

Sigma Space Corporation, 4801, Forbes Boulevard, Lanham, Maryland 20706

Xiaoxiong Xiong

NASA Goddard Space Flight Center (GSFC), Greenbelt, Maryland 20771

Amit Angal

Science Systems and Applications, Inc. (SSAI), Lanham, Maryland 20706

Gyanesh Chander

NASA GSFC, Greenbelt, Maryland 20771

John J. Qu

George Mason University, Global Environment and Natural Resources Institute (GENRI), Department of GGS College of Science, Fairfax, Virginia 20171

J. Appl. Remote Sens. 8(1), 083618 (Jun 06, 2014). doi:10.1117/1.JRS.8.083618
History: Received August 13, 2013; Revised March 27, 2014; Accepted April 10, 2014
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Abstract.  The objective of this paper is to formulate a methodology to assess the spectral stability of the Libya 4, Libya 1, and Mauritania 2 pseudo-invariant calibration sites (PICS) using Earth Observing One (EO-1) Hyperion sensor. All the available Hyperion collections, downloaded from the Earth Explorer website, were utilized for the three PICS. In each site, a reference spectrum is selected at a specific day in the vicinity of the region of interest (ROI) defined by Committee on Earth Observation Satellites (CEOS). A series of ROIs are predefined in the along-track direction with 196 spectral top-of-atmosphere reflectance values in each ROI. Based on the reference ROI spectrum, the spectral stability of these ROIs is evaluated by average deviations (ADs) and spectral angle mapper (SAM) methods in the specific ranges of time and geo-spatial locations. Time and ROI location-dependent SAM and AD results are very stable within ±2deg and ±1.7% of 1σ standard deviations. Consequently, the Libya 4, Mauritania 2, and Libya 1 CEOS selected PICS are spectrally stable targets within the time and spatial swath ranges of the Hyperion collections.

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Citation

Taeyoung Choi ; Xiaoxiong Xiong ; Amit Angal ; Gyanesh Chander and John J. Qu
"Assessment of the spectral stability of Libya 4, Libya 1, and Mauritania 2 sites using Earth Observing One Hyperion", J. Appl. Remote Sens. 8(1), 083618 (Jun 06, 2014). ; http://dx.doi.org/10.1117/1.JRS.8.083618


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