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Ais-2 radiometry and a comparison of methods for the recovery of ground reflectance
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Green, Robert O. Vane, Gregg Curtiss, Brian J. Conel, James E. Alley, Ronald E. Bruegge, Carol J. |
| Copyright Year | 1987 |
| Description | A field experiment and its results involving Airborne Imaging Spectrometer-2 data are described. The radiometry and spectral calibration of the instrument are critically examined in light of laboratory and field measurements. Three methods of compensating for the atmosphere in the search for ground reflectance are compared. It was found that laboratory determined responsitivities are 30 to 50 percent less than expected for conditions of the flight for both short and long wavelength observations. The combined system atmosphere surface signal to noise ratio, as indexed by the mean response divided by the standard deviation for selected areas, lies between 40 and 110, depending upon how scene averages are taken, and is 30 percent less for flight conditions than for laboratory. Atmospheric and surface variations may contribute to this difference. It is not possible to isolate instrument performance from the present data. As for methods of data reduction, the so-called scene average or log-residual method fails to recover any feature present in the surface reflectance, probably because of the extreme homogeneity of the scene. |
| File Size | 3860717 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19880004375 |
| Archival Resource Key | ark:/13960/t77t2kr19 |
| Language | English |
| Publisher Date | 1987-08-15 |
| Access Restriction | Open |
| Subject Keyword | Earth Resources And Remote Sensing Imaging Spectrometers Atmospheric Effects Calibrating Signal To Noise Ratios Data Reduction Spectral Reflectance Spectroradiometers Airborne Equipment Radiance Scene Analysis Spectrum Analysis Line Spectra Radiometric Resolution Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
