of;
Remote;
Sensing;
and;
GIS,;
Peking;
University,;
Beijing;
100871;
Observation;
Center;
of;
China;
Meteorological;
Administration,;
Beijing;
100081;
Troops;
PLA,;
Qingdao;
266405;
GPS信号; 土壤水分; 估计; 校准; 全球导航卫星系统; 归一化植被指数; 植被覆盖; 全球定位系统;