European GNSS (Galileo) open service (797926), страница 2
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E5 Signal.......................................................................................................................................................................................................4Modulation Scheme.............................................................................................................................................................................................42.3.1.2.Modulation Type....................................................................................................................................................................................................52.3.1.3.Equivalent Modulation Type............................................................................................................................................................................6lta2.3.1.1.DRsu2.3.2.
E6 Signal.......................................................................................................................................................................................................72.3.3. E1 Signal .....................................................................................................................................................................................................82.4.
Logic Levels....................................................................................................................................92.5. Transmitted Signal Phase Noise.................................................................................................102.6. Transmitted Signals Code/Data Coherency...............................................................................102.7. Received Power Levels on Ground.............................................................................................102.7.1.
Minimum Levels ...................................................................................................................................................................................102.7.2. Maximum Levels ..................................................................................................................................................................................102.8. Payload and Component Reception Losses..............................................................................103.
Galileo Spreading Codes Characteristics........................................................................12ublic3.1. Code Lengths................................................................................................................................123.2. Tiered Codes Generation ............................................................................................................123.3. Primary Codes Generation..........................................................................................................133.4.
Primary Codes Definition.............................................................................................................133.4.1. E5 Primary Codes..................................................................................................................................................................................13Base Register 2 Start Value for E5a-I....................................................................................................................................................143.4.1.2.Base Register 2 Start Value for E5a-Q..................................................................................................................................................153.4.1.3.Base Register 2 Start Value for E5b-I....................................................................................................................................................163.4.1.4.rP3.4.1.1.Base Register 2 Start Value for E5b-Q..................................................................................................................................................17Fo3.4.2.
E1-B and E1-C Primary Codes.......................................................................................................................................................183.5. Secondary Codes.........................................................................................................................183.5.1. Definition of Secondary Codes.......................................................................................................................................................183.5.2. Secondary Codes Assignment........................................................................................................................................................213.6.
Code Assignments to Satellites..................................................................................................223.6.1. Primary code assignment to satellites......................................................................................................................................223.6.2.
Secondary code assignment to satellites................................................................................................................................224. Galileo Message Structure.................................................................................................234.1. General Message Format Specification......................................................................................234.1.1. General Navigation Message Content.......................................................................................................................................234.1.2.
General Navigation Message Structure....................................................................................................................................234.1.3. Bit and Byte Ordering Criteria .......................................................................................................................................................23© European Union 2014Document subject to terms of use and disclaimers p. i-iiOS SIS ICD, Issue 1.2, dd.mm 2014vi4.1.4.
FEC Coding and Interleaving Parameters................................................................................................................................234.1.4.1.FEC Encoding .......................................................................................................................................................................................................234.1.4.2.Interleaving...........................................................................................................................................................................................................244.1.5.
Frame and Page Timing....................................................................................................................................................................244.2. F/NAV Message Description........................................................................................................244.2.1. General Description of the F/NAV Message ..........................................................................................................................244.2.2.
F/NAV Page Layout...............................................................................................................................................................................25Synchronisation Pattern.................................................................................................................................................................................254.2.2.2.Tail Bits....................................................................................................................................................................................................................254.2.2.3.F/NAV Word...........................................................................................................................................................................................................25tion4.2.2.1.ltaAFCoTn4.2.3.
F/NAV Frame Layout...........................................................................................................................................................................254.2.4. F/NAV Page Contents..........................................................................................................................................................................274.2.5. F/NAV Dummy Page Definition......................................................................................................................................................294.3. I/NAV Message Description........................................................................................................294.3.1. General Description of the I/NAV Message.............................................................................................................................294.3.2.
I/NAV Page Layout................................................................................................................................................................................294.3.2.1.Synchronisation Pattern.................................................................................................................................................................................304.3.2.2.Tail Bits....................................................................................................................................................................................................................304.3.2.3.I/NAV Page Part...................................................................................................................................................................................................30suI/NAV Nominal Sub-Frame Layout..............................................................................................................................................32I/NAV Nominal Frame Layout.........................................................................................................................................................33I/NAV Word Types..................................................................................................................................................................................34I/NAV Dummy Message Layout.....................................................................................................................................................37SAR Field Structure..............................................................................................................................................................................38DR4.3.3.4.3.4.4.3.5.4.3.6.4.3.7.5.
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