Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Validation of the Radiometric Characteristics of Landsat 8 (LDCM) OLI Sensor using Band Aggregation Technique of EO-1 Hyperion Hyperspectral Imagery

EO-1 Hyperion 초분광 영상의 밴드 접합 기법을 이용한 Landsat 8 (LDCM) OLI 센서의 방사 특성 검증

  • Chi, Junhwa (School of Civil Engineering, Purdue University)
  • 지준화 (퍼듀대학교 토목공학과)
  • Received : 2013.08.14
  • Accepted : 2013.08.23
  • Published : 2013.08.30
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Abstract

The quality of satellite imagery should be improved and stabilized to satisfy numerous users. The radiometric characteristics of an optical sensor can be a measure of data quality. In this study, a band aggregation technique and spectral response function of hyperspectral images are used to simulate multispectral images. EO-1 Hyperion and Landsat-8 OLI images acquired with about 30 minutes difference in overpass time were exploited to evaluate radiometric coefficients of OLI. Radiance values of the OLI and the simulated OLI were compared over three subsets covered by different land types. As a result, the index of agreement shows over 0.99 for all VNIR bands although there are errors caused by space/time and sensors.

위성 영상 자료에 대한 품질의 향상과 안정화는 다양한 목적을 가진 사용자들을 만족시킬 수 있다. 특히 절대 방사 검/보정은 영상의 광항적 품질을 유지하기 위한 척도가 된다. 본 연구에서는 초분광 영상 밴드 접합 기법과 분광 반응도를 이용하여 다중 분광 센서의 가상화를 통해 절대 방사 보정 계수의 적합성을 판단하였다. 적합성 분석을 위해 약 30분 차이로 촬영된 EO-1 Hyperion과 Landsat-8 OLI 센서의 영상을 이용하였고, 서로 다른 특성을 지닌 토지 피복으로 구성된 3개 지역을 선정하여 복사 에너지 값을 비교 하였다. 그 결과, 시공간에 따른 차이, 센서 수준의 차이를 제외하고 모든 밴드에서 0.99 이상의 적합성을 보여 주었다.

Keywords

References

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