1. 1 Error Categories 1. Errors related to GPs Satellites 2. Errors related to GPS signal propagation

Perigee and Apogee: The point of closest approach of the satellite with respect to the earth's center of mass is called perigee and the most distant position is the apogee. Nodes: The intersection between the equatorial and the nit sphere is termed the nodes, where the ascending node defines the northward

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

3. Reference Systems Book: p 25-38 Dr Guoqing Zhou 1.1 Overview 1.2 A Group of Basic Ce GPS Basic Positioning Principle

GPS Basic Positioning Principle Two reference systems: Time and Coordinate Syst

Fundamental knowledg Quick Overview Kelperian 3 Laws First Law: ellipse, Sun is a focus Second law: the same area in same time Earth

一、GPS高程问题 二、复习

一、GPS现代化 二、GPS增强系统 三、GPS的应用 四、GPS高程问题

假设在同一观测时段,只有两台接收机在一条基线上进行了 同步观测工作。从这一条件出发,根据间接平差原理,讨论载 波相位观测量不同线性组合的平差模型。这些模型易于推广到 多台接收机观测情况

一、单基线平差模型 二、模型简单、易于编程实现 三、基线之间相关性被忽略 四、不易发现粗差