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Relationships of soil, grass, and bedrock over the kaweah serpentine melange through spectral mixture analysis of aviris data
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Mustard, John F. |
| Copyright Year | 1991 |
| Description | A linear mixing model is used to model the spectral variability of an AVIRIS scene from the western foothills of the Sierra Nevada and calibrate these radiance data to reflectance. Five spectral endmembers from the AVIRIS data, plus an ideal 'shade' endmember were required to model the continuum reflectance of each pixel in the image. Three of the endmembers were interpreted to model the surface constituents green vegetation, dry grass, and illumination. These are the main transient surface constituents that are expected to change with shifts in land use or climatic influences and viewing conditions ('shade' only). The spectral distinction between the other three endmembers is very small, yet the spatial distributions are coherent and interpretable. These distributions cross anthropogenic and vegetation boundaries and are best interpreted as different soil types. Comparison of the fraction images to the bedrock geology maps indicates that substrate composition must be a factor contributing to the spectral properties of these endmembers. Detailed examination of the reflectance spectra of the three soil endmembers reveals that differences in the amount of ferric and ferrous iron and/or organic constituents in the soils is largely responsible for the differences in spectral properties of these endmembers. |
| File Size | 1539025 |
| Page Count | 27 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19920019474 |
| Archival Resource Key | ark:/13960/t1ck39p3m |
| Language | English |
| Publisher Date | 1991-12-01 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Imaging Spectrometers Climatology Calibrating Variability Iron Grasses Infrared Spectra Bedrock Land Use Sierra Nevada Mountains Ca Spectral Reflectance Pixels Soils Airborne Equipment Spatial Distribution Radiance Infrared Spectrometers Spectrum Analysis Vegetation Visible Spectrum Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
