雨自文大電园地 Principles of the Global Positioning System Lecture 05 YUAN Linguo Email:Igyuan@home.switu.edu.cn Dept of Surveying Engineering, Southwest Jiaotong University Outline Review u Examined basics of GPS signal structure and how gnal is tracked a Looked at methods used to acquire satellites and start g Today we look at o Basic gps observables Biases and nois o Examine rinex format and look at some raw"' data wv Principles of the Global Positioning System1 Principles of the Global Positioning System Lecture 05 YUAN Linguo Email: lgyuan@home.swjtu.edu.cn Dept. of Surveying Engineering, Southwest Jiaotong University Principles of the Global Positioning System 2005-3-25 2 Outline Review: ‰ Examined basics of GPS signal structure and how signal is tracked ‰ Looked at methods used to acquire satellites and start tracking Today we look at: ‰ Basic GPS observables ‰ Biases and noise ‰ Examine RINEX format and look at some “raw” data