jgg     2010 30 (2):  152-155    ISSN: 0412-1961  CN: 21-1139/TG PARTICLE FILTERING METHOD BASED ON PROPOSAL DISTRIBUTION FUNCTION OF ERTS SMOOTHING Li Baoli 1,2) ;Gong Yisong 1) ;Zhang Jinjun 3) ; and Li Qigao 4) 1)Institute of Surveying and Mapping, PLA Information Engineering University, Zhengzhou 4500522)Bureau of Surveying and Mapping of General Staff, Beijing 1000883) Branch 22 of Troop 92493, Huludao 1250004) Bureau of Hydrology and Resource of Sanmenxia Reservoir Area of YRCC, Sanmenxia 472000 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null