Vicarious Calibration of the Hyperspectral Imager for Coastal Oceans (HICO) Using MOBY and AERONET-OC Data
Abstract
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2012
- Accession Number
- ADA571865
Entities
People
- David J. Lewis
- Paul M. Martinolich
- Richard W. Gould Jr.
- Sherwin D. Ladner
- Timothy A. Lawson
Organizations
- United States Naval Research Laboratory