1. Signals. - 2. Causes of Signal Impairment. - 3. Baseband Signal Processing. - 4. Services. - 5. Quality of Service. - 6. System Outline. - 7. Orbits and Controlled Trajectories. - 8. Radio-Frequency Design Issues. - 9. Analog Transmission. - 10. Digital Transmission. - 11. Bidirectional Circuit Design. - 12. Channel-Access Schemes. - 13. Networking. - 14. System Economics. - 15. Future Developments. - Appendix 1. Radio Regulations Provisions. - I. Introduction. - II. Frequency Allocations. - III. Interference Coordination. - A. Modes of Interference between Space and Terrestrial Services. - B. Modes of Interference between Stations of Different Space Systems in Frequency Bands with Separated Earth-to-Space and Space-to-Earth Allocations. - C. Modes of Interference between ESs of Different Space Systems in Frequency Bands for Bidirectional Use. - IV. Radiation Limitations. - References. - Appendix 2. Frequency Sharing among Fixed-Satellite Service Networks. - I. Interference Evaluation to Determine if Coordination is Required. - II. Detailed Coordination Calculations and Interference Criteria. - III. Possible Methods to Solve Incompatibilities. - A. Increase in Angular Separation. - B. Adjustment of Network Parameters. - C. Frequency Separation (Staggering). - D. Departure from CCIR Recommendations. - References. - Appendix 3. Frequency Sharing between the Fixed-Satellite Service and the Fixed Service. - I. Determination of the Coordination Area. - II. Detailed Coordination Calculations and Interference Criteria. - III. Possible Methods to Solve Incompatibilities. - A. Frequency Separation. - B. Adjustment of Network Parameters. - C. Other Methods. - References. - Appendix 4. Efficient Use of the Geostationary Orbit-Spectrum Resource. - I. Overcrowding in the Geostationary Orbit. - II. Communication Capacity of the Geostationary Orbit. - A. Method A (Pessimistic). - B. Method B (Optimistic). - C. CCIR Methods. - III. Major Factors Affecting the Efficiency of Geostationary Orbit-Spectrum Utilization. - A. Frequency Reuse Potential. - B. Spacecraft Antenna Radiation Characteristics. - C. Earth Station Antenna Radiation Characteristics. - D. Stationkeeping. - E. Interference Allowance. - F. Optimization of Frequency Assignments and Modulation Characteristics. - IV. Outline of the Main Results of WARC-ORB 85-'88. - References. - Appendix 5. Authors of Individual Sections. - Appendix 6. List of Acronyms. Language: English