Ray Tracing Based Simulation of Stray Light Correction for Geostationary Ocean Color Imager

Title
Ray Tracing Based Simulation of Stray Light Correction for Geostationary Ocean Color Imager
Author(s)
오은송; 홍진석; 안기범; 조성익; 유주형; 김석환
KIOST Author(s)
Cho, Seong Ick(조성익)Ryu, Joo Hyung(유주형)
Publication Year
2013-05-27
Abstract
Image mosaic technique is widely used in a field of remote sensing research. However, in case of Geostationary Ocean Color Imager’s (GOCI’s) mosaic image which is consist of 16 slot images, the radiance level discrepancy was noticed in the cloudy circumstance next to each other slot when acquiring the imagery data in the low Sun elevation angle. We provided, in this study, the in-depth stray light analysis results in order to find out this discrepancy phenomenon, and performed the image restoration with simulated stray light bias. Stray light analysis as the first step was completed with ray tracing technique based on ASAP program, and we suggested that unwanted radiations from the Earth bright target or the atmosphere such as cloud are major candidates of stray light in the problematic images. For embodying GOCI operational concept, we constructed the Integrated Ray Tracing model consisting of the Sun model as a light source, a target Earth model, and the GOCI optical system model.In the second step, we investigated the stray light pattern at each slot image including unwanted random source from out of field, and then constructed the simulated mosaic bias image reached at the detector plane. In the simulated bias, the ray path followed the procedures that light travels from the Sun and it is then reflected from the Earth section of roughly 2500km * 2500km in size around the Korea penin the cloudy circumstance next to each other slot when acquiring the imagery data in the low Sun elevation angle. We provided, in this study, the in-depth stray light analysis results in order to find out this discrepancy phenomenon, and performed the image restoration with simulated stray light bias. Stray light analysis as the first step was completed with ray tracing technique based on ASAP program, and we suggested that unwanted radiations from the Earth bright target or the atmosphere such as cloud are major candidates of stray light in the problematic images. For embodying GOCI operational concept, we constructed the Integrated Ray Tracing model consisting of the Sun model as a light source, a target Earth model, and the GOCI optical system model.In the second step, we investigated the stray light pattern at each slot image including unwanted random source from out of field, and then constructed the simulated mosaic bias image reached at the detector plane. In the simulated bias, the ray path followed the procedures that light travels from the Sun and it is then reflected from the Earth section of roughly 2500km * 2500km in size around the Korea peni
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26959
Bibliographic Citation
2013 춘계 한국우주과학회 학술대회, pp.1, 2013
Publisher
한국우주과학회
Type
Conference
Language
English
Publisher
한국우주과학회
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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