Retrieval and Uncertainty Analysis of Land Surface Reflectance Using a Geostationary Ocean Color Imager SCIE SCOPUS

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Title
Retrieval and Uncertainty Analysis of Land Surface Reflectance Using a Geostationary Ocean Color Imager
Author(s)
Lee, Kyeong Sang; Lee, Eun Kyung; Jin, Donghyun; Seong, Noh-Hun; Jung, Daeseong; Sim, Suyoung; Han, Kyung-Soo
KIOST Author(s)
Lee, Kyeong-Sang(이경상)Lee, Eun Kyung(이은경)
Alternative Author(s)
이경상; 이은경
Publication Year
2022-01
Abstract
Land surface reflectance (LSR) is well known as an essential variable to understand land surface properties. The Geostationary Ocean Color Imager (GOCI) be able to observe not only the ocean but also the land with the high temporal and spatial resolution thanks to its channel specification. In this study, we describe the land atmospheric correction algorithm and present the quality of results through comparison with Moderate Resolution Imaging Spectroradiometer (MODIS) and in-situ data for GOCI-II. The GOCI LSR shows similar spatial distribution and quantity with MODIS LSR for both healthy and unhealthy vegetation cover. Our results agreed well with in-situ-based reference LSR with a high correlation coefficient (>0.9) and low root mean square error (<0.02) in all 8 GOCI channels. In addition, seasonal variation according to the solar zenith angle and phenological dynamics in time-series was well presented in both reference and GOCI LSR. As the results of uncertainty analysis, the estimated uncertainty in GOCI LSR shows a reasonable range (<0.04) even under a high solar zenith angle over 70°. The proposed method in this study can be applied to GOCI-II and can provide continuous satellite-based LSR products having a high temporal and spatial resolution for analyzing land surface properties.
ISSN
2072-4292
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/42260
DOI
10.3390/rs14020360
Bibliographic Citation
Remote Sensing, v.14, no.2, 2022
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Keywords
geostationary ocean color imager; atmospheric correction; 6S; uncertainty analysis; land surface reflectance
Type
Article
Language
English
Document Type
Article
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
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