Vicarious Calibration of the Hyperspectral Imager for Coastal Oceans (HICO) Using MOBY and AERONET-OC Data
NAVAL RESEARCH LAB STENNIS DETACHMENT STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
Pagination or Media Count:
The Hyperspectral Imager for Coastal Oceans HICO was constructed and is managed by the US Naval Research Laboratory NRL. Pre-launch calibration, and therefore sensor measurement accuracy, of satellite sensors can be affected by launch vibrations, temperature fluctuations, space radiation and other factors. Vicarious correction was applied to HICO imagery to improve measurement accuracy. Vicarious calibration applies a reverse atmospheric correction where satellite-derived atmospheric factors are added to in situ normalized-water-leaving radiances to generate vicarious top-of-atmosphere radiances that are used to compute gain and offset values. The gains and offsets are subsequently applied to satellite sensor top-of-atmosphere radiances to force closer agreement with in situ measurements. In situ data from the Marine Optical Buoy MOBY and from some of the NASA AErosol RObotic NET Ocean Color AEONET-OC platforms were used to provide in situ water measurements used to vicariously calibrate HICO data.
- Physical and Dynamic Oceanography
- Optical Detection and Detectors
- Atomic and Molecular Physics and Spectroscopy