"2022年8月最新发布的IS-GPS-200N ICD文件解读及授权说明"

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The IS-GPS-200N ICD file, the latest version released in August 2022, is a comprehensive document that outlines the technical specifications and requirements for the Global Positioning System (GPS). This document, known as RFC-00467, incorporates the latest changes and updates from the IRN-IS-200M-001 file, ensuring that all GPS equipment and systems are up to date and in compliance with industry standards. The authority for the release of this document is RE Tony Anthony, who has authored the content, and RE Mary Kerns, who has checked the accuracy and completeness of the information. Their signatures represent the approval of the document and its distribution to the public. The distribution statement for the IS-GPS-200N ICD file is classified as Distribution Statement A, meaning that it is approved for public release and that there are no restrictions on its distribution. This ensures that anyone who requires access to this information, whether for development, testing, or operational purposes, can obtain a copy of the document without any limitations. As the PNT Technical Director for MilComm, the authorized signature representing the approval of the document, ensures that the technical specifications outlined in the IS-GPS-200N ICD file are in line with the requirements of the GPS system. This ensures that all users of the GPS system can rely on accurate and up-to-date information to support their operations and applications. In conclusion, the IS-GPS-200N ICD file is a critical document for anyone involved in the development, testing, or operation of GPS equipment and systems. Its release in August 2022 ensures that all stakeholders have access to the latest technical specifications and requirements to support their activities. With its approval for public release and unlimited distribution, this document is an essential resource for anyone seeking to leverage the capabilities of the GPS system for navigation, timing, and other applications.

IS-GPS-200N

01-AUG-2022

Table 30-XIII. Reference Times ......................................................................................................................... 209

Table 40-V. Data IDs and SV IDs in Subframes 4 and 5................................................................................ 226

IS-GPS-200N

01-AUG-2022

xvi

LIST OF FIGURES

Figure 3-1. Generation of P-, C/A-Codes and Modulating Signals ................................................................. 20

Figure 3-2. X1A Shift Register Generator Configuration ............................................................................... 22

Figure 3-3. X1B Shift Register Generator Configuration ............................................................................... 23

Figure 3-4. X2A Shift Register Generator Configuration ............................................................................... 23

Figure 3-5. X2B Shift Register Generator Configuration ............................................................................... 24

Figure 3-6. P-Code Generation ........................................................................................................................ 26

Figure 3-7. P-Code Signal Component Timing ............................................................................................... 27

Figure 3-8. G1 Shift Register Generator Configuration .................................................................................. 29

Figure 3-9. G2 Shift Register Generator Configuration .................................................................................. 30

Figure 3-10: Example C/A-Code Generation ....................................................................................................... 31

Figure 3-11. C/A-Code Timing Relationships................................................................................................... 32

Figure 3-12. L2 CM-/L2 CL-Code Timing Relationships................................................................................. 34

Figure 3-13. L2 CM/L2 CL Shift Register Generator Configuration ................................................................ 35

Figure 3-14. Convolutional Encoder ................................................................................................................. 36

Figure 3-15. Convolutional transmit/Decoding Timing Relationships ............................................................. 37

Figure 3-16. Time Line Relationship of HOW Message ................................................................................... 39

Figure 6-1. User Received Minimum Signal Level Variations (Example, Block IIR) ................................... 51

Figure 10.3-1. Letters of Exception ..................................................................................................................... 70

Figure 10.3-2. Letters of Exception (continued) ................................................................................................. 71

Figure 10.3-3. Letters of Exception (continued) ................................................................................................. 72

Figure 10.3-4. Letters of Exception (continued) ................................................................................................. 73

Figure 10.3-5. Letters of Exception (continued) ................................................................................................. 74

Figure 10.3-6. Letters of Exception (continued) ................................................................................................. 75

Figure 10.3-7. Letters of Exception (continued) .................................................................................................. 76

Figure 10.3-8. Letters of Exception (continued) ................................................................................................. 77

Figure 20-1. Data Format (sheet 1 of 11) .......................................................................................................... 80

Figure 20-1. Data Format (sheet 2 of 11) .......................................................................................................... 81

Figure 20-1. Data Format (sheet 3 of 11) .......................................................................................................... 82

Figure 20-1. Data Format (sheet 4 of 11) .......................................................................................................... 83

Figure 20-1. Data Format (sheet 5 of 11) .......................................................................................................... 84

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Figure 20-1. Data Format (sheet 6 of 11) .......................................................................................................... 85

Figure 20-1. Data Format (sheet 7 of 11) .......................................................................................................... 86

Figure 20-1. Data Format (sheet 8 of 11) .......................................................................................................... 87

Figure 20-1. Data Format (sheet 9 of 11) .......................................................................................................... 88

Figure 20-1. Data Format (sheet 10 of 11) ........................................................................................................ 89

Figure 20-1. Data Format (sheet 11 of 11) ........................................................................................................ 90

Figure 20-2. TLM and HOW Formats ............................................................................................................... 92

Figure 20-3. Sample Application of Correction Parameters ........................................................................... 102

Figure 20-4. Ionospheric Model (Sheet 1 of 3) ............................................................................................... 130

Figure 20-4. Ionospheric Model (Sheet 2 of 3).................................................................................................. 131

Figure 20-4. Ionospheric Model (Sheet 3 of 3).................................................................................................. 132

Figure 20-5. Example Flow Chart for User Implementation of Parity Algorithm .......................................... 140

Figure 30-1. Message Type 10 - Ephemeris 1 ................................................................................................. 143

Figure 30-2. Message Type 11 - Ephemeris 2 ................................................................................................. 144

Figure 30-3. Message Type 30 - Clock, IONO & Group Delay ........................................................................ 145

Figure 30-4. Message Type 31 - Clock & Reduced Almanac ............................................................................ 146

Figure 30-5. Message Type 32 - Clock & EOP ............................................................................................... 147

Figure 30-6. Message Type 33 - Clock & UTC .............................................................................................. 148

Figure 30-7. Message Type 34 - Clock & Differential Correction.................................................................. 149

Figure 30-8. Message Type 35 - Clock & GGTO ........................................................................................... 150

Figure 30-9. Message Type 36 - Clock & Text ............................................................................................... 151

Figure 30-10. Message Type 37 - Clock & Midi Almanac ........................................................................... 152

Figure 30-11. Message Type 12 - Reduced Almanac.................................................................................... 153

Figure 30-12. Message Type 13 - Clock Differential Correction .................................................................. 154

Figure 30-13. Message Type 14 - Ephemeris Differential Correction .......................................................... 155

Figure 30-14. Message Type 15 - Text .......................................................................................................... 156

Figure 30-14a. Message Type 40 - Integrity Support Message....................................................................... 157

Figure 30-15. Reduced Almanac Packet Content .......................................................................................... 180

Figure 30-16. Differential Correction Data Packet ........................................................................................ 186

Figure 40-1. Data Format (sheet 1 of 11) ........................................................................................................... 213

Figure 40-1. Data Format (sheet 2 of 11) ........................................................................................................... 214