Conceptual study of lunar-based SAR for global change monitoring

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• 作者：HuaDong Guo (1)
  YiXing Ding (1) (2)
  Guang Liu (1)
  DaoWei Zhang (1)
  WenXue Fu (1)
  Lu Zhang (1)
  
• 关键词：Earth observation ; global change ; Lunar ; based SAR
• 刊名：Science China Earth Sciences
• 出版年：2014
• 出版时间：August 2014
• 年：2014
• 卷：57
• 期：8
• 页码：1771-1779
• 全文大小：1,284 KB
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• 作者单位：HuaDong Guo (1)
  YiXing Ding (1) (2)
  Guang Liu (1)
  DaoWei Zhang (1)
  WenXue Fu (1)
  Lu Zhang (1)
  
  1. Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100094, China
  2. College of Resources and Environment University of Chinese Academy of Sciences, Beijing, 100049, China
  
• ISSN：1869-1897

文摘

As an active microwave remote sensing imaging sensor, Synthetic Aperture Radar (SAR) plays an important role in earth observation. Here we establish a SAR system based on the platform of the moon. This will aid large-scale, constant, and long-term dynamic Earth observations to better meet the needs of global change research and to complement the space borne and airborne earth observations. Lunar-based SAR systems have the characteristics of high resolution and wide swath width. The swath width could be thousands of kilometers in the stripe mode and it could cover 40% of earth’s surface with 10 meters or even higher spatial resolution in the scanning mode. Using the simplified observation model, here we quantitatively analyze the spatial resolution and coverage area of lunar-based SAR and simulate the observation on the Qinghai-Tibet plateau and the Amazon plain. The results show that this system could provide near 100% daily coverage of the Qinghai-Tibet plateau, whereas 40% to 70% daily coverage of the Amazon plain. Lunar-based SAR could provide large-scale, long-term and stable time series data in order to support future research of global change.