通过ALOS卫星PALSAR传感器获得的三景合成孔径雷达(SAR)数据,利用合成孔径雷达差分干涉(D-InSAR)技术对金沙江下游乌东德水电站库区内的滑坡活动进行了详细的研究,获得研究区域内地表高精度形变位移值.将其按滑动速率及位移大小进行分级显示,清晰地表明了研究区内不同区域的地面活动位移状态,辨识出研究区内可能发生滑动和发生滑动较大的区域,从而确定了滑坡活动的风险区.对库区内正处活动状态的L1R-6号滑坡进行了详细的研究.结果表明:D-InSAR技术与全球定位系统GPS在监测整体形变和运动趋势上基本一致.对D-InSAR结果存在的单点误差进行了分析,提出了D-InSAR与GPS相融合的栅格函数误差插值消减法,提高了D-InSAR技术的监测精度

1、GPS的组成;(重点) 2、GPS的坐标系统;(重点) 3、GPS的定位原理与方法。(难点)

– 空间部分 – 地面控制部分 – 用户设备部分

GPS Observables Today's class we start discussing the nature of GPS observables and the methods used to make range and phase measurements Start with idea of remotely measuring distances

东北农业大学：《精细农业》课程教学资源（PPT课件）第二章 GPS（全球定位系统及其应用）

GPS Groups/Gs There are many international and national groups involved in the deployment of GPS The international organization is the International GPs Service(IGs)

武汉大学测绘学院：《GPS原理及其应用》课程教学资源（PPT课件讲稿）第二章 全球定位系统的组成及信号结构 2.2 GPS卫星的信号结构

Today's Lecture Examine specifics of GPS signals Multiple modulations on same carrier signal Structure of signals GPS receiver operation and satellite acquistion

Primary research programs Geophysical research GPS analysis packages GAMIT (GPS at MIT): Uses double differences GYPSY: Jet Propulsion Laboratory (JPL) processing packages: Uses one-way observables and explicitly estimates clocks Bernese: Developed at Astronomical Institute

Treat the basic description and dynamics of satellite orbits Major perturbations on GPS satellite orbits · Sources of orbit information: -SP3 format from the International GPS service Broadcast ephemeris message