The Analysis of Moonborne Cross Track Synthetic Aperture Radar Interferometry for Global Environment Change Monitoring

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Yixing, Ding^1,2,3 ; Huadong, Guo^2 ; Guang, Liu^2 ; Daowei, Zhang^2

Institute of Electronics, Chinese Academy of Sciences, Beijing, China^1

Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China^2

University of Chinese Academy of Sciences, Beijing, China^3

关键词: Earth observations;    Environment change;    Global environment;    Remote sensing imagery;    Repeat pass interferometries;    SAR(synthetic aperture radar);    Single-pass interferometry;    Synthetic aperture radar interferometry;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012278/pdf
DOI  :  10.1088/1755-1315/17/1/012278

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Faced to the earth observation requirement of large scale global environment change, a SAR (Synthetic Aperture Radar) antenna system is proposed to set on Moon's surface for interferometry in this paper. With several advantages superior to low earth obit SAR, such as high space resolution, large range swath and short revisit interval, the moonborne SAR could be a potential data resource of global changes monitoring and environment change research. Due to the high stability and ease of maintenance, the novel system is competent for offering a long and continuous time series of remote sensing imagery. The Moonborne SAR system performance is discussed at the beginning. Then, the peculiarity of interferometry is analyzed in both repeat pass and single pass cases. The chief distinguishing feature which is worth to research the potentiality of repeat pass interferometry is that the revisit interval is reduced to one day in most cases, and in worst case one month. Decorrelation deriving from geometry variety is discussed in detail. It turns out that the feasibility of moonborne SAR repeat pass interferometry depends on the declination of Moon. The severity of shift effects in radar echoes increased as Moon approaches to the equatorial plane. Moreover, referring to the single pass interferometry, two antennas are assumed to set on different latitude of Moon. There is enough space on Moon to form a long baseline, which is highly related to the interferogram precision.