? MIT OpenCourseWare ? Earth, Atmospheric, and Planetary Sciences ? Principles of the Global Positioning System, Spring 2003 Lecture Notes LEC # TOPICS 1 Overview of Class (PDF) 2 Coordinate Systems (PDF) 3 Gravitational Potential (PDF) We also used some MATLAB? scripts in this lecture. The two programs are Harmonics.m, which plots low order harmonics and Sectorials.m, which plots high order sectorial harmonics. 4 Coordinate Types (PDF) 5 Satellite Orbits (PDF) The MATLAB? program to compute eccentic and true anomalies is truea.m 6 GPS Observables (PDF) 7 Specifics of GPS Signal (PDF) 8 Pseudorange Measurements (PDF) The data file displayed in class is etab.plt.dat 9 Range and Phase Data (PDF) The data files displayed in class are ASCII tab delimited files: etab.02tab, etab.07tab, etab.11tab, etab.26tab, etab.28tab (Hint: If you want to check Homework #1, then compute the range to the satellite can compare with theoretical value in the etab.xxtab files.) The site coordinates are in the rinex header shown in Lecture 8. 10 Estimation: Introduction (PDF) 11 Statistical Approach to Estimation (PDF) 12 Estimation: Correlations (PDF) The MATLAB? program fogm.m generates first-order Gauss Markov processes. (Note since the random number generator is not initialized, your results will differ from those in the class notes. Signal processing tool box is needed for the PSD calculation). 13 Estimation (PDF) 14 Propagation Medium: Propagation (PDF) 15 Propagation Medium: Neutral Atmosphere (PDF) 16 Propagation: Ionospheric Delay (PDF) 17 Basic Antenna Operation (PDF) 18 Mathematical Models in GPS (PDF) 19 GPS Models and Processing (PDF) 20 Processing Software (PDF) 21 GPS Groups/IGS (PDF) 22 Kinematic GPS (PDF) Links for Lecture: track.016f.out d016f.NEU.rovr.LC d016f.NEU.rovr.L12 23 Application Areas and GPS results (PDF - 1.1 MB)