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Proceedings Paper

Establishing optimal matchup protocols between ocean color satellites and ground truth AeroNET-OC radiance
Author(s): Adam Lawson; Sherwin Ladner; Richard Crout; Christopher Wood; Robert Arnone; Jennifer Bowers; Paul Martinolich; David Lewis
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Paper Abstract

The SAtellite VAlidation Navy Tool (SAVANT) was developed by the Navy to help facilitate the assessment of the stability and accuracy of ocean color satellites using ground truth (insitu) platform and buoy stations positioned around the globe and support methods for match-up protocols. This automated, continuous monitoring system for satellite ocean color sensors employs a website interface to extract and graph coincident satellite and insitu data in near-real-time. Available satellite sensors include MODerate resolution Imaging Spectrometer (MODIS) onboard the Aqua satellite, Visible Infrared Imaging Radiometer Suite (VIIRS) onboard Suomi National Polar-orbitting Partnership (SNPP) & Joint Polar Satellite Sensor (JPSS), Ocean and Land Colour Instrument (OLCI) onboard the Sentinel 3A and Geostationary Ocean Color Imager (GOCI) onboard the Communication, Ocean and Meteorological Satellite (COMS). SAVANT houses an extensive match-up data set covering nineteen plus years (2000- 2019) of coincident global satellite and ground truth spectral Normalized Water Leaving Radiance (nLw) data allowing users to evaluate the accuracy of ocean color sensors spectral water leaving radiance at specific ground truth sites that provide continuous data. The tool permits changing different match-up constraints and evaluating the effects on the match-up uncertainty. Results include: a) the effects of spatial selection (using single satellite pixel versus 3x3 and 5x5 boxes, all centered around the insitu location), b) time difference between satellite overpass and ground truth observations, c) and satellite and solar zenith angles. Match-up uncertainty analyses was performed on VIIRS SNPP at the AErosol RObotic NETwork Ocean Color (AeroNET-OC) Wave Current surge Information System (WavCIS) site, maintained by NRL and the Louisiana State University (LSU) in the North Central Gulf of Mexico onboard the Chevron platform CSI-06. The VIIRS SNPP and AeroNET-OC assessment determined optimal satellite ocean color cal/val match-up protocols that reduced uncertainty in the derived satellite products.

Paper Details

Date Published: 10 May 2019
PDF: 14 pages
Proc. SPIE 11014, Ocean Sensing and Monitoring XI, 110140C (10 May 2019); doi: 10.1117/12.2521062
Show Author Affiliations
Adam Lawson, U.S. Naval Research Lab. (United States)
Sherwin Ladner, U.S. Naval Research Lab. (United States)
Richard Crout, U.S. Naval Research Lab. (United States)
Christopher Wood, U.S. Naval Research Lab. (United States)
Robert Arnone, The Univ. of Southern Mississippi (United States)
Jennifer Bowers, NASA Stennis Space Ctr. (United States)
Paul Martinolich, NASA Stennis Space Ctr. (United States)
David Lewis, U.S. Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 11014:
Ocean Sensing and Monitoring XI
Weilin "Will" Hou; Robert A. Arnone, Editor(s)

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