Vicarious Calibration of the Hyperspectral Imager for Coastal Oceans (HICO) Using MOBY and AERONET-OC Data

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 oth...

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Bibliographic Details
Main Authors: Lewis, David, Gould, Jr, Richard W, Ladner, Sherwin D, Lawson, Timothy A, Martinolich, Paul
Format: Report
Language:English
Subjects:
AERONET
Atomic and Molecular Physics and Spectroscopy
CALIBRATION
COASTAL REGIONS
HICO(HYPERSPECTRAL IMAGER FOR COASTAL OCEANS)
HYPERSPECTRAL IMAGERY
MOBY(MARINE OPTICAL BUOY)
OCEAN COLOR
OCEANS
Optical Detection and Detectors
OPTICAL DETECTORS
PE0602435N
Physical and Dynamic Oceanography
SATELLITE IMAGERY
VICARIOUS CALIBRATION
WU73-6552-02-5
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Summary: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. Presented at Ocean Optics XXI, Glasgow, Scotland, 8-12 October, 2012.