GLONASS——ICD文件.pdf-资料库

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GLOBAL NAVIGATION SATTELITE SYSTEM GLONASS MOSCOW 2008 INTERFACE CONTROL DOCUMENT Navigational radiosignal In bands L1, L2 (Edition 5.1)

Edition 5.1 2008 ICD L1, L2 GLONASS Russian Institute of Space Device Engineering

Edition 5.1 2008 ICD L1, L2 GLONASS Russian Institute of Space Device Engineering FIGURES........................................................................................................... 5 TABLES ............................................................................................................. 5 1. INTRODUCTION......................................................................................... 8 1.1 GLONASS PURPOSE.................................................................................. 8 1.2 GLONASS COMPONENTS .......................................................................... 8 1.3 NAVIGATION DETERMINATION CONCEPT .................................................... 9 2. GENERAL................................................................................................... 10 2.1 ICD DEFINITION ....................................................................................... 10 2.2 ICD APPROVAL AND REVISION ................................................................. 10 3. REQUIREMENTS...................................................................................... 12 3.1 INTERFACE DEFINITION............................................................................. 12 3.2 NAVIGATION SIGNAL STRUCTURE............................................................. 12 3.2.1 Ranging code ................................................................................... 13 3.2.2 Digital data of navigation message.................................................. 13 3.3 INTERFACE DESCRIPTION.......................................................................... 13 3.3.1 Navigation RF signal characteristics ............................................... 13 3.3.2 Modulation....................................................................................... 17 3.3.3 GLONASS time............................................................................... 22 3.3.4 Coordinate system............................................................................ 23 4. NAVIGATION MESSAGE........................................................................ 25 4.1 NAVIGATION MESSAGE PURPOSE .............................................................. 25 4.2 NAVIGATION MESSAGE CONTENT ............................................................. 25 4.3 NAVIGATION MESSAGE STRUCTURE.......................................................... 25 4.3.1 Superframe structure........................................................................ 26 4.3.2 Frame structure ................................................................................ 27 4.3.3 String structure................................................................................. 29 4.4 IMMEDIATE INFORMATION AND EPHEMERIS PARAMETERS ........................ 30 4.5 NON-IMMEDIATE INFORMATION AND ALMANAC....................................... 36 4.6 RESERVED BITS ........................................................................................ 41 4.7 DATA VERIFICATION ALGORITHM............................................................. 42 5 GLONASS SPACE SEGMENT ................................................................. 43 5.1 CONSTELLATION STRUCTURE ................................................................... 43 5.2 ORBITAL PARAMETERS............................................................................. 44 5.3 INTEGRITY MONITORING........................................................................... 45 RECEIVED POWER LEVEL IN L1 AND L2 SUB-BANDS..................... 46 APPENDIX 2 ................................................................................................... 48

Edition 5.1 2008 ICD L1, L2 GLONASS Russian Institute of Space Device Engineering RECOMMENDATIONS FOR USERS ON OPERATION OF ECEIVER DURING UTC LEAP SECOND CORRECTION ................................................. 48 APPENDIX 3 ................................................................................................... 50 FIGURES Fig. 3.1 Interface NKA/NAP Fig. 3.2 Structure of the shift register shaping a ranging code Fig. 3.3 Simplified block diagramme of PSPD ranging creation code and sync signals for a navigational radiosignal Fig. 3.4 Simplified block diagramme of data creation series Fig. 3.5 T Temporal ratio between sync signals of a modulating navigational signal and PSPD ranging code Fig. 3.6Data series creation in NKA processor Fig. 4.1 Superframe structure Fig. 4.2 Frame structure Fig. 4.3 String structure Fig. of Item 1 Relation between the radiosignal amplifying underpower and elevation angle page 14 20 21 21 22 22 29 31 32 52 TABLES Table 3.1 GLONASS carrier frequencies in L1 and L2 sub-bands Table 3.2 Geodetic constants and parameters of PZ-90.02 common terrestrial ellipsoid Table 4.1 Arrangement of GLONASS almanac within superframe Table 4.2 Accuracy of transmitted of coordinates and velocity for GLONASS satellite Table 4.3 Word P1 Table 4.4 Word FT Table 4.5 Characteristics of words of immediate information (ephemeris parameters) Table 4.6 Arrangement of immediate information within frame Table 4.7 Word KP Table 4.8 Relationship between "age" of almanac and accuracy of positioning Table 4.9 Characteristics of words of non-immediate (almanac) information page 15 25 30 33 34 36 37 39 42 42 43

Edition 5.1 2008 ICD L1, L2 GLONASS Russian Institute of Space Device Engineering Table 4.10 Negative numbers of GLONASS carriers within navigation message Table 4.11 Arrangement of non-immediate information within frame Table 4.12 Arrangement of reserved bits within super frame Table 4.13 Algorithm for verification of data within string Table 5.1 Health flags and operability of the satellite 45 45 46 48 51

Edition 5.1 2008 ICD L1, L2 GLONASS Russian Institute of Space Device Engineering ABBREVIATIONS BIH CCIR CS FDMA GMT ICD KNITs KX LSB MT MSB msd NPO PM PR RF RMS (σ) ROM RNII KP UTC Bureau International de l'Heure Consultative Committee for International Radio Central Synchronizer Frequency division multiple access Greenwich Mean Time Interface Control Document Coordination Scientific Information Center Hamming Code Least Significan Bit Moscow Time Most Significan Bit mean-solar day Scientific and Production Association of Applied Mechanics Pseudo random Radio frequency Root mean square Read only memory Research Institute of Space Device Engineering Coordinated Universal Time

Edition 5.1 2008 ICD L1, L2 GLONASS Russian Institute of Space Device Engineering 1. INTRODUCTION 1.1 GLONASS purpose The purpose of the Global Navigation Satellite System GLONASS is to provide unlimited number of air, marine, and any other type of users with all-weather three-dimensional positioning, velocity measuring and timing anywhere in the world or near-earth space. 1.2 GLONASS components GLONASS includes three components: • Constellation of satellites (space segment); • Ground-based control facilities (control segment); • User equipment (user segment). Completely deployed GLONASS constellation is composed of 24 satellites in three orbital planes whose ascending nodes are 120 apart. 8 satellites are equally spaced in each plane with argument of latitude displacement 45. The orbital planes have 15 -argument of latitude displacement relative to each other. The satellites operate in circular 19100-km orbits at an inclination 64.8, and each satellite completes the orbit in approximately 11 hours 15 minutes. The spacing of the satellites allows providing continuous and global coverage of the terrestrial surface and the near-earth space. The control segment includes the System Control Center and the network of the Command and Tracking Stations that are located throughout the territory of Russia. The control segment provides monitoring of GLONASS constellation status, correction to the orbital parameters and navigation data uploading. User equipment consists of receives and processors receiving and processing the GLONASS navigation signals, and allows user to calculate the coordinates, velocity and time.

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