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Evaluation of ais-2 (1986) data over hydrothermally altered granitoid rocks of the singatse range (yerington) nevada and comparison with 1985 ais-1 data
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lyon, R. J. P. |
| Copyright Year | 1987 |
| Description | The Airborne Imaging Spectrometer-2 (AIS-2) flights along 2 subparallel lines (bearing 013) were designed to traverse 3 major rock assemblages - the Triassic sedimentary sequence; the granitoid rocks of the Yerington batholith and the Tertiary ignimbritic ash flow and ash fall tuffs. The first 2 sites are hydrothermally altered to a quartz-sericite-tourmaline mineralogy. The first AIS-2 data set showed numerous line dropouts and a considerable number of randomly distributed dark pixels. A second decommutation reduced the dropout essentially to near zero and the dark pixels by about 75 percent. Vertical striping was removed by histogram matching, column by column. A log residual spectrum was calculated which showed the departure of a 2 x 2 pixel area from the spatially and spectrally averaged scene. A 1:1 correlation was found with the log residual AIS-2 data and a large open pit area of gypsum. An area with known sericite agreed with the overflight data, and an area known to be free of any significant amount of O-H bearing materials showed no evidence of any in the AIS-2 log residuals. |
| File Size | 7872614 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19880004385 |
| Archival Resource Key | ark:/13960/t12p0140s |
| Language | English |
| Publisher Date | 1987-08-15 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Imaging Spectrometers Histograms Hydrothermal Systems Airborne Equipment Chemical Analysis Spectral Resolution Scene Analysis Spectrum Analysis Remote Sensing Spectral Reflectance Granite Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
