이전|다음

HY-1C/D 위성 데이터를 이용한 료둥만 해빙 식별 및 추정

  • role： First author第一作者
  • Affiliation：

    International Institute for Earth System Science, Nanjing University, Nanjing 210023, China

  • Email：MG21270021@smail.nju.edu.cn
  • Introduction：李玲，研究方向为海洋环境遥感。E-mail： MG21270021@smail.nju.edu.cn
LI Ling1,  
  • Affiliation：

    International Institute for Earth System Science, Nanjing University, Nanjing 210023, China

    Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210093, China

SUO Ziyi12,  
  • Affiliation：

    National Satellite Ocean Application Center, Beijing 100081, China

SHI Lijian3,  
  • Affiliation：

    International Institute for Earth System Science, Nanjing University, Nanjing 210023, China

    College of Harbour and Coastal Engineering, Jimei University, Xiamen 361021, China

WANG Qing14,  
  • Affiliation：

    International Institute for Earth System Science, Nanjing University, Nanjing 210023, China

JIAO Junnan1,  
  • Affiliation：

    International Institute for Earth System Science, Nanjing University, Nanjing 210023, China

TANG Jun1,  
  • role： Corresponding author通信作者
  • Affiliation：

    International Institute for Earth System Science, Nanjing University, Nanjing 210023, China

  • Email：Luyc@nju.edu.cn
  • Introduction：陆应诚，研究方向为海洋环境遥感。E-mail： Luyc@nju.edu.cn
LU Yingcheng1*

추상적인

해빙은 해양 환경 모니터링의 주요 대상이며, 광학 원격 탐사는 해빙의 정밀 모니터링을 위한 기술적 지원을 제공하여 해빙의 동적 모니터링 및 정량적 추정을 실현할 수 있다. 중국 해양 수색 사업 위성 성단—Haiyang-1C/D 위성(HY-1C/D)은 해빙 모니터링에 적합한 해안대 영상장치 CZI(Coastal Zone Imager)와 수색 수온 스캐너 COCTS(Chinese Ocean Color and Temperature Scanner)를 탑재하고 있어 해빙 사업화 모니터링 응용이 가능하다. 본 연구는 2021년 12월부터 2022년 3월까지 중국 보하이해 료둥만 해빙을 연구 대상으로 하여 빙기 내 HY-1C/D 위성 영상 데이터를 수집하고 해빙 식별 및 추정 연구를 수행하였다. CZI와 COCTS 데이터의 해빙 식별 효과를 평가하고, 해빙, 해수, 구름 등 전형적인 대상물들의 광학(가시광선~근적외선) 및 열적외선 대역 영상 특성을 분석하였다. 또한 광학 원격 탐사 영상에서 해빙 식별이 구름 간섭을 받기 쉬운 문제를 해결하기 위해 상기 대역에서의 원격 탐사 반응 메커니즘 및 영상 특성 차이를 기반으로 HY-1C/D 위성의 해빙 분포 지역에 적합한 구름 마스크 방법을 제안하고 해빙을 정확히 추출하였다. 식별을 바탕으로 HY-1C/D 위성 데이터가 해빙 밀집도라는 핵심 물리 매개변수의 광학 원격 탐사 추정 효율을 추가로 평가하였다. 결과는 열적외선 대역을 도입하고 해빙과 구름의 밝기 온도 차이를 이용하여 구름을 마스크함으로써 전역 임계값으로 해빙 화소 추출이 가능함을 보여주었다. CZI와 COCTS 영상 내 해빙의 고정밀 추출을 통해 해빙 밀집도 추정이 가능해졌으며, 이는 화소 내 해빙과 해수 혼합 정도를 효과적으로 반영하여 해빙 해수 화소 분해 효과를 실현하고 해빙 피복 면적 추정 정확도를 향상시켰다. 종합하면, 본 연구 방법은 HY-1C/D 위성 영상 데이터에서 해빙 식별 및 추출에 대해 높은 정밀도와 간섭 저항성을 갖추어 국산 해양 광학 위성의 해빙 모니터링 사업화 응용에 방법론적 참고를 제공할 수 있다.

키워드

Haiyang-1C/D 위성;해빙;스펙트럼 특성;밝기 온도;구름 검출;해빙 밀집도

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