IS-GPS-800A - US Coast Guard Navigation Center

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012End/start of week18 secondsX1 Epoch @ 2/3 bps11800 bits01800 bit L1C O -Code @ 100 bps10 msec1 2 3 4 1798 1799 180010230 10230 10230 10230 10230 10230 1023010230 bit L1C P -Code @ 1.023 Mbpsetc.10Message Symbol (D L1C (t)) @ 100 sps1 2 3 4 1798 1799 180010230 10230 10230 10230 10230 10230 1023010230 bit L1C D -Code @ 1.023 Mbpsetc.Figure 3.3-1. L1CP-/L1CD-/L1CO-Code Timing Relationships26 IS-GPS-800A8 June 2010
Bit valueL1C DbitstreamSubcarrier squarewaveModulated symbols101010Bit value(a) Combined modulated symbols for L1C D using BOC (1,1)L1C PbitstreamSubcarriersquarewaveModulatedsymbols101010(b) Combined modulated symbols for L1C P showing incorporation of BOC (6,1) chips101 1 1 0 0 0 1 0 0 1 0 1 1 1 0 0 0 1 0 0 1 0 1 1 1 0 0 0 1 0 0 1 01BOCChip = ‘0’BOCChip = ‘0’0~489 ns ~81.5 ns(c) Combined 33 symbol sequence showing BOC (6,1) chips at 0,4,6, and 29Figure 3.3-2. Subcarrier Polarity Mapping27 IS-GPS-800A8 June 2010
Page 1 and 2: IS-GPS-800A8 June 2010GLOBAL POSITI
Page 3 and 4: REVISION RECORDLTR DESCRIPTION DATE
Page 5 and 6: 3.2.3.3 Cyclic Redundancy Check ...
Page 7 and 8: LIST OF FIGURESFigure 3.2-1. Genera
Page 9 and 10: 1. INTRODUCTION1.1 ScopeThis Interf
Page 11 and 12: 3. SIGNAL REQUIREMENTSThe requireme
Page 13 and 14: Carriers of the two L1C components
Page 15 and 16: 3.2.2 PRN Code CharacteristicsThe c
Page 17 and 18: The overlay codes are derived from
Page 19 and 20: 3.2-2 L1C Ranging Codes Parameter A
Page 21 and 22: GPS PRNSignal No.3.2-3 L1C O Overla
Page 23 and 24: FIXED LENGTH-10223 LEGENDRE SEQUENC
Page 25 and 26: 3.2.2.2 Non-Standard CodesThe non-s
Page 27 and 28: corresponding to MSB = 0. (A SV tra
Page 29 and 30: This code has the following charact
Page 31 and 32: 3.2.3.5 InterleavingThe 1748 encode
Page 33: 3.3 Signal ModulationThe signals mo
Page 37 and 38: 3.5 Message DefinitionAs shown in F
Page 40 and 41: DIRECTION OF DATA FLOW FROM SV100 B
Page 46 and 47: 3.5.3 Subframe 2Subframe 2 provides
Page 48 and 49: Table 3.5-1. Subframe 2 Parameters
Page 50 and 51: 3.5.3.1 Transmission Week NumberBit
Page 52 and 53: 3.5.3.6 Ephemeris Parameter Charact
Page 54 and 55: Table 3.5-2. Elements of Coordinate
Page 56 and 57: The user shall use the broadcast UR
Page 58 and 59: where, ISC L1CD is provided to the
Page 60 and 61: 3.5.3.10.1 Integrity Status Flag (I
Page 62 and 63: The ionospheric data shall be updat
Page 64 and 65: 3.5.4.2.3 User Algorithm for Applic
Page 66 and 67: transmitted by the SVs will degrade
Page 68 and 69: Table 3.5-7.Midi Almanac Parameters
Page 70 and 71: MSBCDC = Clock Differential Correct
Page 72 and 73: 3.5.4.5 Subframe 3, Page 6 - TextSu
Page 74 and 75: 5. RESERVED66 IS-GPS-800A8 June 201
Page 76 and 77: LSF - Leap Seconds FutureL1C - Comm
Page 78 and 79: Table 6.2-1.Legendre Sequence (Octa
Page 80 and 81: Table 6.2-2 LDPC Submatrix A for Su
Page 82 and 83: Table 6.2-2 LDPC Submatrix A for Su
Page 84 and 85:
Table 6.2-2 LDPC Submatrix A for Su
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Table 6.2-3. LDPC Submatrix B for S
Page 92 and 93:
Table 6.2-7. LDPC Submatrix T for s
Page 94 and 95:
Table 6.2-7. LDPC Submatrix T for s
Page 96 and 97:
Table 6.2-8. LDPC Submatrix A for s
Page 98 and 99:
Table 6.2-8. LDPC Submatrix A for s
Page 100 and 101:
Table 6.2-9. LDPC Submatrix B for S
Page 102 and 103:
Table 6.2-13. LDPC Submatrix T for
Page 104 and 105:
Table 6.2-16. Number of 1’s in LD
Page 106 and 107:
6.3 Supporting Material6.3.1 Additi
Page 108 and 109:
Table 6.3-1 Additional L1C Ranging
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
PRNSignalNo.Table 6.3-2. Additional
Page 116 and 117:
PRNSignalNo.Table 6.3-2 Additional
Page 118 and 119:
Page 120 and 121:
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