Inter-Sensor Comparison of Satellite Ocean Color Products from GOCI and MODIS

Abstract

The Geostationary Ocean Color Imager (GOCI) was launched by the Republic of Korea on 27 June 2010 and is the first geostationary ocean color sensor in orbit that provides coastal bio-optical properties (such as chlorophyll concentration, absorption and backscattering coefficients) at unprecedented high spatial and temporal resolution. GOCI has 8 spectral bands covering 2,500 km x 2,500 km (centered 130E, 36N) at 500 m spatial resolution. Unlike polar-orbiting satellites which provide only one or two images of the same geographic area per day, GOCI collects images every hour from 9am to 4pm (eight images per day). This high temporal resolution can lead to improved understanding of short time scale optical and bio-optical variability in the ocean surface. However, retrieving ocean color products accurately can be challenging particularly in turbid coastal waters due to imperfect atmospheric correction. In this study, we process GOCI data through US Naval Research Lab's Automated Processing System (APS) and the standard GOCI Data Processing System (GDPS) distributed by the Korea Ocean Satellite Center (KOSC), and compare the retrieved ocean color products from the two processing systems. We use corresponding Moderate Resolution Imaging Spectroradiometer (MODIS) images as the ground truth to assess the performance of the two processing systems. Since these sensors can retrieve Fluorescence Line Height (FLH) which is less sensitive to atmospheric correction and colored dissolved organic matter (CDOM), we also compare the FLH products from these sensors, in addition to other ocean color products. Furthermore, we demonstrate the use of hourly GOCI images to detect and track features such as sediment plumes and algal blooms in the ocean surface.

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Document Details

Document Type
Technical Report
Publication Date
Feb 26, 2013
Accession Number
ADA582705

Entities

People

  • Adam Lawson
  • Igor G. Shulman
  • Jason K. Jolliff
  • Paul M. Martinolich
  • Peter Sakalaukus
  • Richard W Gould
  • Robert A. Arnone
  • Ruhul Amin
  • Sherwin D. Ladner

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Sensors
  • Space

DTIC Thesaurus Topics

  • Absorption
  • Agreements
  • Algorithms
  • Artificial Satellites
  • Backscattering
  • Chemistry
  • Data Processing
  • Fluorescence
  • Frequency
  • Geographic Regions
  • Military Research
  • Optical Phenomena
  • Optical Properties
  • Particles
  • Quantum Yields
  • Scattering
  • Water

Fields of Study

  • Environmental science

Readers

  • Chemistry (specifically Chemical Fluorescence)
  • Coastal Oceanography
  • Image Processing and Computer Vision.

Technology Areas

  • Space