Table of Contents

1 Front Matter; 2 Executive Summary; 3 1 Introduction; 4 2 GPS Applications and Requirements; 5 3 Performance Improvements to the Existing GPS Configuration; 6 4 Technical Enhancements for Future Consideration; 7 Appendix A: Study Participants; 8 Appendix B: Abbreviated Committee Biographies; 9 Appendix C: Overview of the Global Positioning System ..; 10 Appendix D: Accuracy Definitions and Mathematical Relationships; 11 Appendix E: Report From Mr. Michael Dyment, Booz, Allen & Hamilton; 12 Appendix F: Report From Dr. Young Lee, The MITRE Corporation; 13 Appendix G: Increased Bandwidth Performance Analysis; 14 Appendix H: Signal Structure Options; 15 Appendix I: Report from Mr. Melvin Barmat, Jansky/Barmat..; 16 Appendix J: Selective Denial of Civilian GPS Signals by the Military; 17 Appendix K: Direct Y-Code Acquisition; 18 Appendix L: Enhanced Signal Structures for the Military; 19 Appendix M: Accuracy of a 14-Satellite Ensemble Versu a 24-Satellite Ensemble

About the Author

Aeronautics and Space Engineering Board, National Research Council