Conceptual study of lunar-based SAR for global change monitoring
Conceptual study of lunar-based SAR for global change monitoring
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DOI：
10.1007/s11430-013-4714-2
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
Huadong Guo;Yixing Ding;Guang Liu;Daowei Zhang;W. Fu;Lu Zhang
中科院分区：
文献类型：
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作者：
Huadong Guo;Yixing Ding;Guang Liu;Daowei Zhang;W. Fu;Lu Zhang
合成孔径雷达（SAR）作为一种主动微波遥感成像传感器，在对地观测中发挥着重要作用。这里我们建立了一个基于月球平台的SAR系统。这将有助于开展大规模、持续、长期的动态对地观测，更好地满足全球变化研究的需要，并与星载和机载对地观测相补充。月基SAR系统具有高分辨率、宽测绘带宽度的特点。条带模式下测绘幅宽可达数千公里，扫描模式下可覆盖地球表面的40%，空间分辨率可达10米甚至更高。利用简化观测模型，定量分析月基SAR的空间分辨率和覆盖面积，并模拟青藏高原和亚马逊平原的观测。结果表明，该系统对青藏高原的日覆盖率接近100%，对亚马逊平原的日覆盖率达到40%至70%。月基合成孔径雷达可以提供大范围、长期、稳定的时间序列数据，为未来全球变化研究提供支持。
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.