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http://dx.doi.org/10.7780/kjrs.2020.36.6.2.2

Characteristics of KOMPSAT-3A Key Image Quality Parameters During Normal Operation Phase  

Seo, DooChun (National Satellite Operation & Application Center, Korea Aerospace Research Institute)
Kim, Hyun-Ho (National Satellite Operation & Application Center, Korea Aerospace Research Institute)
Jung, JaeHun (National Satellite Operation & Application Center, Korea Aerospace Research Institute)
Lee, DongHan (National Satellite Operation & Application Center, Korea Aerospace Research Institute)
Publication Information
Korean Journal of Remote Sensing / v.36, no.6_2, 2020 , pp. 1493-1507 More about this Journal
Abstract
The LEOP Cal/Val (Launch and Early Operation Phase Calibration/Validation) was carried out during 6 months after KOMPSAT-3A (KOMPSAT-3A Korea Multi-Purpose Satellite-3A) was launched in March 2015. After LEOP Cal/Val was successfully completed, high resolution KOMPSAT-3A has been successfully distributing to users over the past 8 years. The sub-meter high-resolution satellite image data obtained from KOMPSAT-3A is used as basic data for qualitative and quantitative information extraction in various fields such as mapping, GIS (Geographic Information System), and national land management, etc. The KARI (Korea Aerospace Research Institute) periodically checks and manages the quality of KOMPSAT-3A's product and the characteristics of satellite hardware to ensure the accuracy and reliability of information extracted from satellite data of KOMPSAT-3A. To minimize the deterioration of image quality due to aging of satellite hardware, payload and attitude sensors of KOMPSAT-3A, continuous improvement of image quality has been carried out. In this paper, the Cal/Val work-flow defined in the KOMPSAT-3A development phase was illustrated for the period of before and after the launch. The MTF, SNR, and location accuracy are the key parameters to estimate image quality and the methods of the measurements of each parameter are also described in this work. On the basis of defined quality parameters, the performance was evaluated and measured during the period of after LEOP Cal/Val. The current status and characteristics of MTF, SNR, and location accuracy of KOMPSAT-3A from 2016 to May 2020 were described as well.
Keywords
KOMPSAT-3A; Image Quality Parameters; MTF; SNR; Location accuracy;
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