In-Scene-Based Atmospheric Correction of Uncalibrated VISible-SWIR (VIS-SWIR) Hyper- and Multispectral Imagery
SPECTRAL SCIENCES INC BURLINGTON MA
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The QUAC Quick Atmospheric Correction algorithm for in-scene-based atmospheric correction of VIS-SWIR VISible-Short Wave InfraRed Multi- and Hyperspectral Imagery MSI and HSI is reviewed and applied to radiometrically uncalibrated data. Quite good agreement was previously demonstrated for the retrieved pixel spectral reflectances between QUAC and the physics-based atmospheric correction code FLAASH Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes for a variety of HSI and MSI data cubes. In these code-to-code comparisons, all the data cubes were obtained with well-calibrated sensors. However, many sensors operate in an uncalibrated manner, precluding the use of physics-based codes to retrieve surface reflectance. The ability to retrieve absolute spectral reflectances from such sensors would significantly increase the utility of their data. We apply QUAC to calibrated and uncalibrated versions of the same Landsat MSI data cube, and demonstrate nearly identical retrieved spectral reflectances for the two data sets.
- Atmospheric Physics
- Computer Programming and Software
- Miscellaneous Detection and Detectors
- Electricity and Magnetism