SPS Performance 2001 - GLOBAL POSITIONING SYSTEM STANDARD...

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GLOBAL POSITIONING SYSTEM STANDARD POSITIONING SERVICE PERFORMANCE STANDARD OCTOBER, 2001 ASSISTANT SECRETARY OF DEFENSE FOR COMMAND, CONTROL, COMMUNICATIONS, AND INTELLIGENCE
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October 2001 GPS SPS Performance Standard Page i TABLE OF CONTENTS SECTION 1 The GPS Standard Positioning Service ....................................... 1 1.1 Purpose ............................................................................................................................. 1 1.2 Scope ................................................................................................................................ 1 1.3 The GPS Standard Positioning Service ............................................................................ 2 1.4 Global Positioning System Overview ................................................................................ 2 1.4.1 The GPS Space Segment ...................................................................................... 2 1.4.2 The GPS Control Segment ..................................................................................... 3 1.5 Current SPS Performance Assessment Concept and Limitations ................................... 4 SECTION 2 SPS Ranging Signal Characteristics and Minimum Usage Assumptions ...................................................................... 7 2.1 An Overview of SPS Ranging Signal Characteristics ....................................................... 7 2.1.1 An Overview of SPS Ranging Signal RF Characteristics ...................................... 7 2.1.2 An Overview of the GPS Navigation Message ....................................................... 7 2.2 Usage Assumptions for SPS Performance Standards ..................................................... 8 SECTION 3 GPS SPS Performance Standards ............................................. 11 3.1 Constellation Management Standard ............................................................................. 12 3.2 Service Availability Standard .......................................................................................... 13 3.3 Service Reliability Standard ............................................................................................ 14 3.4 Accuracy Standard .......................................................................................................... 14 3.5 GPS Status and Problem Reporting Standard ............................................................... 15 Figures and Tables Figure 1-1. Block IIA SPS Ranging Signal Generation and Transmission ...................................... 3 Figure 1-2. The GPS Control Segment ............................................................................................ 4 Figure 2-1. Navigation Message Content and Format Overview ..................................................... 8 Table 3-1. Reference Orbit Slot Assignments as of the Defined Epoch ....................................... 12 Table 3-2. Position Dilution of Precision Availability Standard ...................................................... 13 Table 3-3. SPS Service Availability Standard ............................................................................... 13 Table 3-4. Service Reliability Standard ......................................................................................... 14 Table 3-5. Constellation SPS SIS URE Standard ......................................................................... 14 Table 3-6. Positioning and Timing Accuracy Standard ................................................................. 15
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October 2001 GPS SPS Performance Standard Page ii Appendix A: GPS Documented Performance Characteristics ................... A-1 SECTION A-1 Introduction .......................................................................................................... A-1 SECTION A-2 GPS Operations Review ...................................................................................... A-5 SECTION A-3 Service Availability Characteristics .................................................................... A-13 SECTION A-4 Service Reliability Characteristics ..................................................................... A-19 SECTION A-5 Accuracy Characteristics ................................................................................... A-25 Appendix B: Key Terms, Definitions, and Acronyms ................................. B-1 SECTION B-1 Key Terms and Definitions ................................................................................... B-1 SECTION B-2 Acronyms ............................................................................................................. B-5
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October 2001 GPS SPS Performance Standard Page 1 SECTION 1 The GPS Standard Positioning Service The Global Positioning System (GPS) is a space-based radionavigation system managed and operated by the United States (U.S.) Government. GPS was designed as a dual-use system with the primary purpose of enhancing the effectiveness of U.S. and allied military forces. GPS provides a substantial military advantage and is now being integrated into virtually every facet of military operations. GPS is also becoming an integral component of the Global Information Infrastructure, with applications ranging from mapping and surveying to international air traffic management and global climate change research. In an effort to make this beneficial service available to the greatest number of users while ensuring that the national security interests of the United States are observed, two GPS services are provided. The Precise Positioning Service (PPS) is available primarily to the military and other authorized users of the United States and its allies equipped with PPS receivers. The Standard Positioning Service (SPS) was originally
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