[1] Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
[2] Henan Polytech Univ, Sch Surveying & Land Informat Engn, Jiaozuo 454003, Peoples R China
[3] Tech Univ Catalonia, Dept Signal Theory & Commun, Barcelona 08034, Spain
[4] Nanjing Univ Posts & Telecommun, Dept Surveying & Geoinformat, Nanjing 210023, Peoples R China
[5] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China
[6] European Space Agcy, European Space Res & Technol Ctr Estec, NL-2200 AG Noordwijk, Netherlands
[7] Chinese Acad Sci, Natl Space Sci Ctr, Beijing 100190, Peoples R China
[8] Nanjing Univ Informat Sci & Technol, Sch Remote Sensing & Geomatics Engn, Nanjing 210044, Peoples R China
[9] Changan Univ, Coll Geol Engn & Geomat, Xian 710054, Peoples R China
[10] Univ Elect Sci & Technol China, Chengdu 611731, Peoples R China