Galileo OS SIS ICD (797928), страница 10
Текст из файла (страница 10)
2-4.k=19T0+1050BBT0+1100BBT0+1150BBk=19Reference:Issue:Revision:Date:GAL OS SIS ICD/D.0Draft023/05/2006Page54k=19k=19k=19k=19k=1k=1k=1k=1k=1k=1101123456789k=1912k=191k=19k=19k=19k=19k=1k=1k=1k=1k=1k=1111212345678910k=19k=19k=19k=19k=19k=19k=1k=1k=1k=1k=1k=1121234567891011k=19k=19k=19k=19k=19k=19k=1k=1k=1k=1k=1k=1Table 30: GST/Sub-frame concordance9.2.4 F/NAV Page ContentsThe following paragraphs specify the contents of the pages above allocated.9.2.4.1 F/NAV E5a page type 1This data is formatted in page identified as 1 according to the values stated in Table 30.49HTotal1 26 246244TOWBTailBE5aDVSSpareBBE5aHSWNBBRegion 1Region 2Region 3Region 4Region 5BBai2BBBai0B8BBaf2BB6 10 14 28 18 12GSTBGDE5a/L1Ionosphericdisturbance flagSISAAzai1Ionospheric correctionCRC6af1BBBBIODnavt0caf0BBType=1SVIDClockcorrection12 12 12 1 1 1 1 1 10 2 12 20Table 31: Bits allocation for F/NAV E5a-I page type 19.2.4.2 F/NAV E5a page type 2 and 3This data is formatted in pages identified as 2 and 3 according to the values stated in Table 31and Table 32.450H451H24a1/23232PPEBB32B0i141220Tail32•ΩCRC6 10•TOWM0ΩGSTWNType=2IODnavEphemeris (1/3)Total246244Ephemeris (2/3)©, 2006, European Space Agency / Galileo Joint UndertakingDocument subject to terms of use and disclaimers p.
2-4.GSTpaCRCaipeDnTable 32: Bits allocation for F/NAV E5a-I page type 2: ephemeris (1/3) with GSTTotalGAL OS SIS ICD/D.0Draft023/05/2006Page55i0Ω∆nCUCCUS CRCCRSt0e32321616161614B6 10Reference:Issue:Revision:Date:BBBBBBBB16BBWN TOWB12208246244Table 33: Bits allocation for F/NAV E5a-I page type 3: ephemeris (2/3) with GST9.2.4.3 F/NAV E5a page type 4The clock is repeated in page identified as 4 according to the values stated in Table 33.452H8 88BBBBA1GBBWN0GBA0GBBBBBBBBBBBBBBBBBBTailWNt24CRC∆tLst0t32SpareA116TOWA016BCIS6 10GST-GPSConversionWNLSFDN∆tLsFt0GCICGST-UTC ConversionType=4IODnavEphemeris(3/3)Total2052462448 3 8 8 16 12 6Table 34: Bits allocation for F/NAV E5a-I page type 49.2.4.4 F/NAV E5a-I Page Type 5 and 6The data packets with almanac and satellite health status are allocated in the 5th page of eachsub-frame. Two pages are needed to transmit the almanac for 3 satellites according to thefollowing scheme (see Table 34 and Table 35). F/NAV page type 5: Almanac with Week Number and almanac reference time F/NAV page type 6: Almanac page453H45HSVSVID1SVSVID2 (1/2)8 8 6 17 11 16 11 16 11 16 14 1126BSpareCRCTail246B.BeP(Δa)1TotalBδi (1/2)8P17 11 161/2ωBBBBBBaf0BΩBBeωδiΩ0BBM0PPBB(Δa)1/2BBBWNat0aSVID1Type=5IODaBSVID2BSVstatus(E5aHS)Baf1B62Table 35: Bits allocation for F/NAV E5a-I page type 5©, 2006, European Space Agency / Galileo Joint UndertakingDocument subject to terms of use and disclaimers p.
2-4.244SVSVID2 (2/2)GAL OS SIS ICD/D.0Draft023/05/2006Page56SVSVID317 11 16 11 16 11 16 14 112TailBSpareCRCTotal.BBBBBaf0BBBΩBBΩ0BBδiεωPM0P(Δa)1/2BBBBBBB.BBΩM0af0BBΩ0BBType=6IODaδi(2/2)B6SVstatus(E5aHS)2af111 16 14 11BBSVID3BSVstatus(E5aHS)Baf1BReference:Issue:Revision:Date:6 2 3 162 24 6250Table 36: Bits allocation for F/NAV E5a-I page type 69.3 I/NAV MESSAGE DESCRIPTION9.3.1 General description of the I/NAV messageThe I/NAV message structures for channels E5b-I and E1-B use the same page layout, sincethe service provided on these frequencies is a dual frequency service, using frequencydiversity. Only page sequencing is different, with page swapping between both channels inorder to allow a fast reception of data by a dual frequency receiver.
Nevertheless, the frame isdesigned to allow receivers to work also with a single frequency.9.3.1.1General Page LayoutTwo types of pages are defined: A nominal page having a duration of 2 seconds transmitted independently on each ofthe frequencies E5b and E1 An alert page having duration of 1 second transmitted on both frequencies.In nominal mode the page layout for the I/NAV channels is according to Table 36, where thepage contents are transmitted independently on each frequency (E5b and E1) within 2seconds.45H166424 8 6 120©, 2006, European Space Agency / Galileo Joint UndertakingDocument subject to terms of use and disclaimers p. 2-4.Total1ReservedTail1CRCj6 120Dataj(2/2)Reserved112Type1Even/odd=11TotalTypeData i (1/2)E1BTailEven/odd=0E5b-IData j+1 (1/2)11112Total57Tail24 8 6 120PageType64GAL OS SIS ICD/D.0Draft023/05/2006Even/odd=016Total1CRCjReservedTailType1ReservedEven/odd=1Datai(2/2)Reference:Issue:Revision:Date:6 120Table 37: I/NAV nominal page with bits allocationThe parameters for the nominal page have the following meaning and related values: Even/Odd field: to indicate the part of the page (0 = even / 1 = odd) that is broadcast Type (1 bit) equal to 0 to indicate the nominal page type Data (112 bits +16 bits = 128 bits): composed of a nominal word of 128 bitsIn alert mode the page layout for theI/NAV channels is according to Table 37, where the pagecontents are spread over the two channels.
The alarm page is divided in two parts (Data 1/2and Data 2/2), which are transmitted at the same epoch over the channels E5b and E1Brespectively. This process is repeated at the next epoch but switching the two parts betweenthe channels.456HTotalTail6 120Reserved (1/2)11112Total1126 120Total1121Tail11Tail1TypeTypeReserved (2/2)6 120Type112Even/odd=11Reserved (2/2)Even/odd=01TotalTypeReserved (1/2)TailEven/odd=0E1BEven/odd=1E5b-I6 120Table 38: I/NAV alert page with bits allocationThe parameters for the alert page have the following meaning and related values: Even/Odd field: to indicate the part of the page (0 = even / 1 = odd) that is broadcast Type (1 bit) equal to 1 to indicate the alert page type©, 2006, European Space Agency / Galileo Joint UndertakingDocument subject to terms of use and disclaimers p.
2-4.Reference:Issue:Revision:Date:GAL OS SIS ICD/D.0Draft023/05/2006Page589.3.1.2 Nominal Sub-Frame LayoutIn nominal mode, the page sequence for I/NAV E5b-I and I/NAV E1-B in every sub-frame isaccording to Table 38, where T0 is synchronized with GST origin modulo 30 seconds.457HT0(GST0sync.)[s]0123456789101112131415161718192021222324252627282930BBBE5bsubframeIDNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN+1BE5bpageEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenBE5b contentWord 1 (1/2)ReservedWord 3 (1/2)Word 3 (2/2)ReservedWord 5 (1/2)Word 5 (2/2)ReservedWord 7 (1/2)Word 7 (2/2)ReservedWord 9 (1/2)Word 9 (2/2)ReservedReservedReservedReservedReservedReservedReservedReservedReservedReservedReservedWord 2 (1/2)Word 2 (2/2)ReservedWord 4 (1/2)Word 4 (2/2)ReservedWord 6 (1/2)Word 6 (2/2)ReservedSpare Word (1/2)Word (2/2)ReservedSpare Word (1/2)Spare Word (2/2)ReservedWord 1 (1/2)Word 1 (2/2)BBBBE1B contentE1BpageSpare Word (2/2)ReservedWord 2 (1/2)Word 2 (2/2)ReservedWord 4 (1/2)Word 4 (2/2)ReservedWord 6 (1/2)Word 6 (2/2)ReservedWord 8 (1/2)Word 8 (2/2)ReservedWord 10 (1/2)Word 10 (2/2)ReservedReservedReservedReservedReservedReservedReservedReservedReservedReservedReservedWord 1 (1/2)Word 1 (2/2)ReservedWord 3 (1/2)Word 3 (2/2)ReservedWord 5 (1/2)Word 5 (2/2)ReservedSpare Word (1/2)Spare Word (2/2)ReservedSpare Word (1/2)Spare Word (2/2)ReservedBBBBBBOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddEvenOddE1BsubframeIDN-1NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNTable 39: I/Nav nominal sub-frame structureNote: the almanacs are repeated in the next sub-frame with each word transmitted on the otherfrequency respectively.9.3.1.3 Nominal Frame LayoutThe I/NAV sub-frames containing slow repetition data are sequenced according to Table 39.458H©, 2006, European Space Agency / Galileo Joint UndertakingDocument subject to terms of use and disclaimers p.
2-4.[s]SubframeID01T0302603904120515061807210824092701030011330123601339014420154501648017510185401957020600216302266023Reference:Issue:Revision:Date:GAL OS SIS ICD/D.0Draft023/05/2006Page59E5bWord 7: Almanac SV 1 (1/2)E1BWord 7: Almanac SV 19 (1/2)Word 8: Almanac SV 1 (2/2) + almanac SV 2 (1/2)Word 8: Almanac SV 19 (2/2) + almanac SV 20 (1/2)Word 9: Almanac SV 2 (2/2) + almanac SV 3 (1/2)Word 9: Almanac SV 20 (2/2) + almanac SV 21 (1/2)Word 10: Almanac SV 3 (2/2)Word 10: Almanac SV 21 (2/2)Word 7: Almanac SV 4 (1/2)Word 7: Almanac SV 22 (1/2)Word 8: Almanac SV 4 (2/2) + almanac SV 5 (1/2)Word 8: Almanac SV 22 (2/2) + almanac SV 23 (1/2)Word 9: Almanac SV 5 (2/2) + almanac SV 6 (1/2)Word 9: Almanac SV 23 (2/2) + almanac SV 24 (1/2)Word 10: Almanac SV 6 (2/2)Word 10: Almanac SV 24 (2/2)Word 7: Almanac SV 7 (1/2)Word 7: Almanac SV 25 (1/2)Word 8: Almanac SV 7 (2/2) + almanac SV 8 (1/2)Word 8: Almanac SV 25 (2/2) + almanac SV 26 (1/2)Word 9: Almanac SV 8 (2/2) + almanac SV 9 (1/2)Word 9: Almanac SV 26 (2/2) + almanac SV 27 (1/2)Word 10: Almanac SV 9 (2/2)Word 10: Almanac SV 27 (2/2)Word 7: Almanac SV 10 (1/2)Word 7: Almanac SV 28 (1/2)Word 8: Almanac SV 10 (2/2) + almanac SV 11 (1/2)Word 8: Almanac SV 28 (2/2) + almanac SV 29 (1/2)Word 9: Almanac SV 11 (2/2) + almanac SV 12 (1/2)Word 9: Almanac SV 29 (2/2) + almanac SV 30 (1/2)Word 10: Almanac SV 12 (2/2)Word 10: Almanac SV 30 (2/2)Word 7: Almanac SV 13 (1/2)Word 7: Almanac SV 31 (1/2)Word 8: Almanac SV 13 (2/2) + almanac SV 14 (1/2)Word 8: Almanac SV 31 (2/2) + almanac SV 32 (1/2)Word 9: Almanac SV 14 (2/2) + almanac SV 15 (1/2)Word 9: Almanac SV 32 (2/2) + almanac SV 33 (1/2)Word 10: Almanac SV 15 (2/2)Word 10: Almanac SV 33 (2/2)Word 7: Almanac SV 16 (1/2)Word 7: Almanac SV 34 (1/2)Word 8: Almanac SV 16 (2/2) + almanac SV 17 (1/2)Word 8: Almanac SV 34 (2/2) + almanac SV 35 (1/2)Word 9: Almanac SV 17 (2/2) + almanac SV 18 (1/2)Word 9: Almanac SV 35 (2/2) + almanac SV 36 (1/2)Word 10: Almanac SV 18 (2/2)Word 10: Almanac SV 36 (2/2)Word 7: Almanac SV 19 (1/2)Word 7: Almanac SV 1 (1/2)Word 8: Almanac SV 19 (2/2) + almanac SV 20 (1/2)Word 8: Almanac SV 1 (2/2) + almanac SV 2 (1/2)Word 9: Almanac SV 20 (2/2) + almanac SV 21 (1/2)Word 9: Almanac SV 2 (2/2) + almanac SV 3 (1/2)Word 10: Almanac SV 21 (2/2)Word 10: Almanac SV 3 (2/2)Word 7: Almanac SV 22 (1/2)Word 7: Almanac SV 4 (1/2)Word 8: Almanac SV 22 (2/2) + almanac SV 23 (1/2)Word 8: Almanac SV 4 (2/2) + almanac SV 5 (1/2)Word 9: Almanac SV 23 (2/2) + almanac SV 24 (1/2)Word 9: Almanac SV 5 (2/2) + almanac SV 6 (1/2)Word 10: Almanac SV 24 (2/2)Word 10: Almanac SV 6 (2/2)Word 7: Almanac SV 25 (1/2)Word 7: Almanac SV 7 (1/2)Word 8: Almanac SV 25 (2/2) + almanac SV 26 (1/2)Word 8: Almanac SV 7 (2/2) + almanac SV 8 (1/2)Word 9: Almanac SV 26 (2/2) + almanac SV 27 (1/2)Word 9: Almanac SV 8 (2/2) + almanac SV 9 (1/2)Word 10: Almanac SV 27 (2/2)Word 10: Almanac SV 9 (2/2)Word 7: Almanac SV 28 (1/2)Word 7: Almanac SV 10 (1/2)Word 8: Almanac SV 28 (2/2) + almanac SV 29 (1/2)Word 8: Almanac SV 10 (2/2) + almanac SV 11 (1/2)Word 9: Almanac SV 29 (2/2) + almanac SV 30 (1/2)Word 9: Almanac SV 11 (2/2) + almanac SV 12 (1/2)Word 10: Almanac SV 30 (2/2)Word 10: Almanac SV 12 (2/2)Word 7: Almanac SV 31 (1/2)Word 7: Almanac SV 13 (1/2)Word 8: Almanac SV 31 (2/2) + almanac SV 32 (1/2)Word 8: Almanac SV 13 (2/2) + almanac SV 14 (1/2)Word 9: Almanac SV 32 (2/2) + almanac SV 33 (1/2)Word 9: Almanac SV 14 (2/2) + almanac SV 15 (1/2)Word 10: Almanac SV 33 (2/2)Word 10: Almanac SV 15 (2/2)Word 7: Almanac SV 34 (1/2)Word 7: Almanac SV 16 (1/2)©, 2006, European Space Agency / Galileo Joint UndertakingDocument subject to terms of use and disclaimers p.
2-4.69024Reference:Issue:Revision:Date:GAL OS SIS ICD/D.0Draft023/05/2006Page60Word 8: Almanac SV 34 (2/2) + almanac SV 35 (1/2)Word 8: Almanac SV 16 (2/2) + almanac SV 17 (1/2)Word 9: Almanac SV 35 (2/2) + almanac SV 36 (1/2)Word 9: Almanac SV 17 (2/2) + almanac SV 18 (1/2)Word 10: Almanac SV 36 (2/2)Word 10: Almanac SV 18 (2/2)Table 40: I/NAV sub-frame sequencing9.3.1.4 Page ContentsEphemeris, clock corrections, ionospheric corrections, GST, health status and data validitystatus pages are formatted according to the values stated in Table 40 to Table 44.459H460HWord Type 1: Ephemeris (1/4)IODnavt0eM0ea1/2Reserved610143232322PBBBBPType=1Ephemeris (1/4)Total128Table 41: Bits allocation for word type 1Word Type 2: Ephemeris (2/4)IODnavΩ610320•i0ωi323214BBBReservedType=2Ephemeris (2/4)2Total128Table 42: Bits allocation for word type 2Word Type 3: SVID and Ephemeris (3/4)Reserved24CRS6CRC10CUSSVID6CUCIODnavΩ∆nType=3Ephemeris (3/4)16161616162BBBBBBBB•Total128Table 43: Bits allocation for word type 3Ephemeris(4/4)Clock correction parameters(1/2)©, 2006, European Space Agency / Galileo Joint UndertakingDocument subject to terms of use and disclaimers p.
![](https://s.studizba.com/z.php?f=/templates/si/i/noavatar.png&w=100&h=100&t=1"){kind=avatar}
