Derivation and Comparison of Narrow and Broadband Algorithms for the Retrieval of Ocean Color Information from Multi-Spectral Camera on Kompsat-2 Satellite KCI

Title
Derivation and Comparison of Narrow and Broadband Algorithms for the Retrieval of Ocean Color Information from Multi-Spectral Camera on Kompsat-2 Satellite
Author(s)
안유환; Palanisamy Shanmugam; Joo-Hyung Ryu; Jeong-Eon Moon
KIOST Author(s)
Ryu, Joo Hyung(유주형)Moon, Jeong Eon(문정언)
Publication Year
2005-06
Abstract
The present study aims to derive and compare narrow and broad bandwidths of ocean color sensor's algorithms for the study of monitoring highly dynamic coastal oceanic environmental parameters using high-resolution imagery acquired from Multi-spectral Camera (MSC) on KOMPSAT-2. These algorithms are derived based on a large data set of remote sensing reflectances ( Rrs ) generated by using numerical model that relates bb/(a+bb) to Rrs as functions of inherent optical properties, such as absorption and backscattering coefficients of six water components including water, phytoplankton (chl), dissolved organic matter (DOM), suspended sediment (SS) concentration, heterotropic organism (he) and an unknown component, possibly represented by bubbles or other particulates unrelated to the first five components. The modeled Rrs spectra appear to be consistent with in-situ spectra collected from Korean waters. As Kompsat-2 MSC has similar spectral characteristics with Landsat-5 Thematic Mapper (TM), the model generated Rrs values at 2 ㎚ interval are converted to the equivalent remote sensing reflectances at MSC and TM bands. The empirical relationships between the spectral ratios of modeled Rrs and chlorophyll concentrations are established in order to derive algorithms for both TM and MSC. Similarly, algorithms are obtained by relating a single band reflectance (band 2) to the suspended sediment concentrations. These algorithms derived by taking into account the narrow and broad spectral bandwidths are compared and assessed. Findings suggest that there was less difference between the broad and narrow band relationships, and the determination coefficient (r2) for log-transformed data [ N = 500] was interestingly found to be (r2) = 0.90 0.90 for both TM and MSC. Similarly, the determination coefficient for log-transformed data [ N = 500] was 0.93 and 0.92 for TM and MSC respectively. The algorithms presented here are expected to make significant contribution to the enhanced understanding of coastal oceanic environmental parameters using Multi-spectral Camera.
ISSN
1225-6161
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5058
Bibliographic Citation
대한원격탐사학회지, v.21, no.3, pp.173 - 188, 2005
Publisher
대한원격탐사학회
Keywords
Ocean color; Multi-Spectral Camera; Landsat-TM; Case-1 and Case-II waters; Rrs Model and Spectral Band Model
Type
Article
Publisher
대한원격탐사학회
Related Researcher
Research Interests

Coastal Remote Sensing,RS based Marine Surveillance System,GOCI Series Operation,연안 원격탐사,원격탐사기반 해양감시,천리안해양관측위성 운영

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