European GNSS (Galileo) open service (797926), страница 3
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Message Data Contents.....................................................................................................40ublic5.1. Navigation Data.............................................................................................................................405.1.1.Ephemeris..................................................................................................................................................................................................405.1.2. Galileo System Time (GST)..............................................................................................................................................................425.1.3.
Clock Correction Parameters...........................................................................................................................................................435.1.4. Satellite Time Correction Algorithm............................................................................................................................................435.1.5. Broadcast Group Delay......................................................................................................................................................................445.1.6.
Ionospheric Correction........................................................................................................................................................................455.1.7. GST-UTC Conversion Algorithm and Parameters.................................................................................................................465.1.8. GPS to Galileo System Time Conversion and Parameters..............................................................................................475.1.9.
Service Parameters..............................................................................................................................................................................47Satellite ID.............................................................................................................................................................................................................475.1.9.2.Issue Of Data.......................................................................................................................................................................................................485.1.9.3.Navigation Data Validity and Signal Health Status .......................................................................................................................485.1.9.4.Checksum...............................................................................................................................................................................................................49rP5.1.9.1.Fo5.1.10.Almanac.....................................................................................................................................................................................................505.1.11.
Signal – – n63Space Accuracy (SISA).........................................................................................................................................515.2. SAR RLM Data...............................................................................................................................516.
Annex A - List of Acronyms...............................................................................................537. Annex B - Definitions and Nomenclature.........................................................................55vii© European Union 2014Document subject to terms of use and disclaimers p.
i-iiOS SIS ICD, Issue 1.2, dd.mm 20148. Annex C - Galileo E1 and E5 Primary Codes....................................................................56C.1.Introduction...................................................................................................................................56C.2. Hexadecimal Coding Convention ...............................................................................................569. Annex D - Licence Agreement...........................................................................................57tionForPublicDRsultaAFCoTnAnnex D.1 - List of OS SIS ICD Related Intellectual Property Rights................................................62© European Union 2014Document subject to terms of use and disclaimers p.
i-iiOS SIS ICD, Issue 1.2, dd.mm 2014viiiList of FigurestionltaForPublicDRsuFigure 9.Figure 10.Figure 11.Figure 12.Figure 13.Figure 14.Figure 15.Space Vehicle/Navigation User Interface..................................................................................................................................1Galileo Frequency Plan........................................................................................................................................................................2Modulation Scheme for the E5 Signal .......................................................................................................................................4One Period of the Two Sub-carrier Functions Involved in AltBOC Modulation....................................................68-PSK Phase-State Diagram of E5 AltBOC Signal...............................................................................................................6Modulation Scheme for the E6 Signal........................................................................................................................................7Modulation Scheme for the E1 CBOC Signal...........................................................................................................................8One period of the CBOC sub-carrier for a) the E1-B signal component, and b) the E1-C signalcomponent.................................................................................................................................................................................................9Tiered Codes Generation.................................................................................................................................................................12LFSR Based Code Generator for Truncated and Combined M‑sequences...........................................................13Code Register Feedback Taps Representation (example for E5a-I)........................................................................14Start Value Representation for Base Register 2 (first code of E5a‑I)....................................................................14Convolutional Coding Scheme......................................................................................................................................................24F/NAV Message Structure...............................................................................................................................................................25I/NAV Message Structure in the Nominal Mode.................................................................................................................29AFCoTnFigure 1.Figure 2.Figure 3.Figure 4.Figure 5.Figure 6.Figure 7.Figure 8.ix© European Union 2014Document subject to terms of use and disclaimers p.
i-iiOS SIS ICD, Issue 1.2, dd.mm 2014List of TablestionsultaAFCoTnCarrier Frequency per Signal............................................................................................................................................................2Galileo Signals Receiver Reference Bandwidths...................................................................................................................3Signal Description Parameters........................................................................................................................................................4E5 Chip Rates and Symbol Rates..................................................................................................................................................5AltBOC Sub-carrier Coefficients......................................................................................................................................................5Look-up Table for AltBOC Phase States....................................................................................................................................7E6 Chip Rates and Symbol Rates..................................................................................................................................................7E1 CBOC Chip Rates and Sub-carrier Rates.............................................................................................................................8E1-B/C Symbol Rates............................................................................................................................................................................9Logic to Signal Level Assignment.................................................................................................................................................9Received Minimum Power Levels on Ground.......................................................................................................................10Additional Losses due to Receiver Filtering..........................................................................................................................11Code Lengths.........................................................................................................................................................................................12E5 Primary Codes Specifications................................................................................................................................................14Base Register 2 Start Values and First Code Chip for E5a-I.......................................................................................15Base Register 2 start Values and First Code Chip for E5a-Q......................................................................................16Base Register 2 Start Values and First Code Chip for E5b-l.......................................................................................17Base Register 2 Start Values and First Code Chip for E5b-Q.....................................................................................18Secondary Code Sequences (Part 1).........................................................................................................................................20Secondary Code Sequences (Part 2).........................................................................................................................................21Secondary Code Assignment........................................................................................................................................................22Message Allocation and General Data Content..................................................................................................................23Data Coding Parameters.................................................................................................................................................................24Interleaving Parameters..................................................................................................................................................................24F/NAV Page Layout.............................................................................................................................................................................25F/NAV Frame Layout..........................................................................................................................................................................27Bits Allocation for F/NAV Page Type 1.....................................................................................................................................28Bits Allocation for F/NAV Page Type 2.....................................................................................................................................28Bits Allocation for F/NAV Page Type 3.....................................................................................................................................28Bits Allocation for F/NAV Page Type 4.....................................................................................................................................28Bits Allocation for F/NAV Page Type 5.....................................................................................................................................28Bits Allocation for F/NAV Page Type 6.....................................................................................................................................29Bits Allocation for F/NAV Dummy Page..................................................................................................................................29I/NAV Page Part Layout....................................................................................................................................................................30I/NAV Nominal Page with Bits Allocation...............................................................................................................................30I/NAV Alert Page with Bits Allocation.......................................................................................................................................31I/Nav Nominal Sub-Frame Structure........................................................................................................................................33I/NAV Sub-Frame Sequencing.......................................................................................................................................................34Bits Allocation for I/NAV Word Type 1......................................................................................................................................35Bits Allocation for I/NAV Word Type 2......................................................................................................................................35Bits Allocation for I/NAV Word Type 3......................................................................................................................................35Bits Allocation for I/NAV Word Type 4......................................................................................................................................35Bits Allocation for I/NAV Word Type 5......................................................................................................................................35Bits Allocation for I/NAV Word Type 6......................................................................................................................................36Bits Allocation for I/NAV Word Type 7......................................................................................................................................36Bits Allocation for I/NAV Word Type 8......................................................................................................................................36Bits Allocation for I/NAV Word Type 9......................................................................................................................................36Bits Allocation for I/NAV Word Type 10...................................................................................................................................36Bits Allocation for Spare Word.....................................................................................................................................................37I/NAV Dummy Page with Bits Allocation................................................................................................................................37Dummy Word with Bits Allocation.............................................................................................................................................38ForPublicDRTable 1.Table 2.Table 3.Table 4.Table 5.Table 6.Table 7.Table 8.Table 9.Table 10.Table 11.Table 12.Table 13.Table 14.Table 15.Table 16.Table 17.Table 18.Table 19.Table 20.Table 21.Table 22.Table 23.Table 24.Table 25.Table 26.Table 27.Table 28.Table 29.Table 30.Table 31.Table 32.Table 33.Table 34.Table 35.Table 36.Table 37.Table 38.Table 39.Table 40.Table 41.Table 42.Table 43.Table 44.Table 45.Table 46.Table 47.Table 48.Table 49.Table 50.Table 51.© European Union 2014Document subject to 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