Exploring regional adjustment of coastal VIIRS by repurposing on-orbit vicarious calibration methodology
Abstract
NASA ocean color scientists have established a methodology for vicarious calibration of ocean color sensors using the Marine Optical Buoy (MOBY). This system level calibration forces agreement between remotely sensed water leaving radiance (Lt) and the expected in situ response (vLt). Vicarious calibration generally requires a long time series of coincident satellite and in situ data in order to establish robust calibration. Since November 2011, NRL has been using the VIIRS measured Lt and the AERONET-OC derived vLt, to monitor spectral offsets, also known as spectral gain (Lt/vLt), for the VIIRS sensor at each wavelength, guided by previously established techniques. In the absence of a long time series, we have established practicable offsets to explore applying blue water gains established at the MOBY site and coastal water gains from the WaveCis AERONET-OC site in the Gulf of Mexico.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.A33N0354B
- Keywords:
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- 4264 OCEANOGRAPHY: GENERAL / Ocean optics;
- 4275 OCEANOGRAPHY: GENERAL / Remote sensing and electromagnetic processes