Journal of Space Technology and Applications (우주기술과 응용)

The Korean Space Science Society (한국우주과학회)
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Analysis Methods of Visible and Near-Infrared (VNIR) Spectrum Data in Space Exploration

우주탐사에서의 가시광-근적외선 분광 자료 분석 기법

  • Eung Seok Yi (Department of Astronomy, Space Science and Geology, Chungnam National University) ;
  • Kyeong Ja Kim (Korea Institute of Geoscience and Mineral Resources) ;
  • Ik-Seon Hong (Korea Institute of Geoscience and Mineral Resources) ;
  • Suyeon Kim (Korea Institute of Geoscience and Mineral Resources)
  • Received : 2023.03.21
  • Accepted : 2023.04.10
  • Published : 2023.05.31
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Abstract

In space exploration, spectroscopic observation is useful for understanding objects' composition and physical properties. There are various methods for analyzing spectral data, and there are differences depending on the object and the wavelength. This paper introduces a method for analyzing visible & nearinfrared (VNIR) spectral data, which is mainly applied in lunar exploration. The main analysis methods include false color ratio image processing, reflectance pattern analysis, integrated band depth (IBD) processing, and continuum removal as preprocessing before analysis. These spectroscopic analysis methods help to understand the mineral properties of the lunar surface in the VNIR region and can be applied to other celestial bodies such as Mars.

우주탐사에서 분광관측은 대상의 구성 성분과 물리적 특성을 이해하는 데 유용한 방법이다. 분광 자료 분석에는 여러 가지 방법이 있으며, 관측 대상과 파장대역에 따라 차이가 있다. 본 논문에서는 달 탐사에서 주로 적용하는 가시광-근적외선(visible & near-infrared, VNIR) 분광 자료 분석 방법에 대해 소개한다. 주요 분석 방법에는 가색상 비율(false color ratio) 영상 처리, 반사도 유형(reflectance pattern) 분석, 통합 대역 깊이(integrated band depth, IBD) 계산이 있으며, 분석 이전의 전처리로는 연속체 제거(continuum removal)가 있다. 이러한 분광 분석 방법들은 가시광-근적외선 영역에서 나타나는 달 표면의 광물 특성을 이해하는데 도움이 되며, 화성과 같은 다른 천체에도 적용할 수 있다.

Keywords

Acknowledgement

이 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행되었습니다(NRF-2022R1A2C1092602). 또한 이 연구는 정부(과학기술정보통신부)의 재원으로 한국지질자원연구원의 지원을 받아 수행되었습니다(KIGAM, 23-3216).

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