NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Discrimination among semi-arid landscape endmembers using the Spectral Angle Mapper (SAM) algorithmAirborne Visible/Infrared Imaging Spectrometer (AVIRIS) data were acquired during three consecutive seasons of the year (26 Sep. 1989, 22 Mar. 1990, and 7 Aug. 1990) over an area of the High Plains east of Greeley, Colorado. This region contains extensive eolian deposits in the form of stabilized dune complexes (small scale parabolic dunes superimposed on large scale longitudinal and parabolic dunes). Due to the dunes' large scale (2-10 km) and low relief (1-5 m), the scaling relationships that contribute to the evolution of this landscape are nearly impossible to understand without the use of remote sensing. Additionally, climate models indicate that the High Plains could be one of the first areas to experience changes in climate caused by either global warming or cooling. During the past 10,000 years there were at least three periods of extensive sand activity, followed by periods of landscape stability, as shown in the stratigraphic record of this area. Therefore, if the past is an indication of the future, the monitoring of this landscape and its sensitive ecosystem is important for early detection of regional and global climate change.
Document ID
19940012238
Document Type
Conference Paper
Authors
Yuhas, Roberta H. (Colorado Univ. Boulder, CO, United States)
Goetz, Alexander F. H. (Colorado Univ. Boulder, CO, United States)
Boardman, Joe W. (Commonwealth Scientific and Industrial Research Organization North Ryde, Australia)
Date Acquired
September 6, 2013
Publication Date
June 1, 1992
Publication Information
Publication: JPL, Summaries of the Third Annual JPL Airborne Geoscience Workshop. Volume 1: AVIRIS Workshop
Subject Category
EARTH RESOURCES AND REMOTE SENSING
Funding Number(s)
CONTRACT_GRANT: NAGW-270
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

NameType 19940012238.pdf STI

Related Records

IDRelationTitle19940011700Analytic PrimaryTwenty-Fourth Lunar and Planetary Science Conference. Part 2: G-M