1 Introduction 1.1 Definition of Geodesy 1.2 Classification of Geodesy 1.3 Aim of Geodesy 1.4 Historical Introduction 1.5 Recent Developments of Space Geodesy Vocabulary 2 Reference System 2.1 Time Systems 2.2 International Earth Rotation Service 2.3 Celestial Reference System 2.4 Terrestrial Reference System 2.5 Gravity Field Related Reference Systems Vocabulary 3 Methods of Measurement in Geodesy 3.1 Terrestrial Geodetic Measurements 3.2 Satellite Observations 3.3 Gravity Measurements 3.4 Astronomic Measurements Vocabulary 4 Geodetic Networks 4.1 Horizontal Control Networks 4.2 Vertical Contr01 Networks 4.3 Three.dimensional Networks 4.4 Gravity Networks Vocabulary 5 The gravity field of the Earth 5.1 Fundamentals of the Gravity Field 5.2 Level Surfaces and Plumb Lines ……