IS-GPS-705D (797936)
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REVISION RECORDLTRNCAN/AADESCRIPTIONDATEAPPROVEDInitial Release24 Nov 0324 Nov 03Incorporates GPSIIIA changes8 Jun 20108 Jun 2010SE&I Tech Pubs29 July 2010IRN-IS-705A-001 - RFC 00016B - PseudorandomNoise (PRN) Expansion21 Sep 20118 Dec 2011Incorporation of IRN-IS-705A-001 through IRN-IS705A-00621 Sep 20118 Dec 2011IRN-IS-705B-00117 Apr 201217 Apr 2012IRN-IS-705B-002 (RFC 139B – Public Signals-inSpace Updates5 Sep 201231 Jan 2013IRN-IS-705C-001 (L1C Data Predict Week Number24 Sep 201321 Mar 2014IRN-IS-705A-002 - RFC 00077B - PublicDocument Management (GPS III terminology andSpace Service Volume (SSV) group delay)IRN-IS-705A-003 - RFC 00086 - User RangeAccuracy (URA) DefinitionIRN-IS-705A-004 - RFC 00091A - Civil Navigation(CNAV) DurationsIRN-IS-705A-005 - RFC 00093 - Technical Note 36IRN-IS-705A-006 - RFC 00097 - PseudorangeParametersBC(WNop)IRN-IS-705C-002(PublicRequirements Disconnects)DSignalsinSpaceIRN-IS-705C-003 (CNAV Reference Times)IRN-IS-705C-004(PRNs211-102323 Jan 2014MissionAssignments)IRN-IS-705C-005 (Clarification of CNAV BroadcastIntervals)iiIS-GPS-705D24 Sep 2013TABLE OF CONTENTS123INTRODUCTION ..................................................................................................................
11.1Scope. ............................................................................................................................... 11.2IS Approval and Changes................................................................................................. 1APPLICABLE DOCUMENTS ..............................................................................................
12.1Government Documents................................................................................................... 12.2Non-Government Documents. ......................................................................................... 2REQUIREMENTS .................................................................................................................. 23.1Interface Definition. ......................................................................................................... 23.2Interface Identification.
.................................................................................................... 33.2.1Ranging Codes. ......................................................................................................... 43.2.2NAV Data. ................................................................................................................ 43.2.3L5 Signal Structure. .................................................................................................. 73.3Interface Criteria.
............................................................................................................. 83.3.1Composite Signal. ..................................................................................................... 83.3.2PRN Code Characteristics....................................................................................... 113.3.3Navigation Data. .....................................................................................................
163.3.4GPS Time and SV Z-Count. ................................................................................... 184NOT APPLICABLE ............................................................................................................. 215NOT APPLICABLE ............................................................................................................. 226NOTES .................................................................................................................................. 236.1Acronyms ....................................................................................................................... 236.2Definitions.
..................................................................................................................... 266.2.1User Range Accuracy. ............................................................................................ 26iiiIS-GPS-705D24 Sep 20136.2.2SV Block Definitions. ............................................................................................. 266.2.3Operational Interval Definitions.
............................................................................ 266.2.4GPS Week Number. ................................................................................................ 266.36.3.1L5 Received Signals. .............................................................................................. 276.3.2Integrated Phase Noise Characteristics. .................................................................. 276.3.3Ellipticity Characteristics. ....................................................................................... 286.3.4Additional PRN Sequences.
.................................................................................... 286.410Supporting Material........................................................................................................ 27Operational Protocols ..................................................................................................... 336.4.1Lower PRN Numbers Versus Upper PRN Numbers .............................................. 336.4.2PRN Number Consistency ...................................................................................... 336.4.3PRNs 33 and 37 ......................................................................................................
336.4.4PRNs 33 through 63 ................................................................................................ 34APPENDIX I. LETTERS OF EXCEPTION ....................................................................... 35Scope. ......................................................................................................................... 3510.2Applicable Documents. .............................................................................................. 3510.3Letters of Exception.................................................................................................... 352010.1APPENDIX II. GPS NAVIGATION DATA STRUCTURE FOR L5 CNAV DATA, D5(t) ................................................................................................................................................
4020.1Scope. ......................................................................................................................... 4020.2Applicable Documents. .............................................................................................. 4020.2.1Government Documents. ........................................................................................ 4020.2.2Non-Government Documents. ................................................................................
4020.320.3.1Requirements. ............................................................................................................. 40Data Characteristics. ............................................................................................... 40ivIS-GPS-705D24 Sep 201320.3.2Message Structure. .................................................................................................. 4120.3.3Message Content. ....................................................................................................
4120.3.4Timing Relationships. ............................................................................................. 9120.3.5Data Frame Parity. .................................................................................................. 93vIS-GPS-705D24 Sep 2013LIST OF FIGURESFigure 3-1.GPS Space Segment to User Segment Interfaces ..................................................
3Figure 3-2.Generation of Codes ............................................................................................. 12Figure 3-3.Modulation of Signals .......................................................................................... 13Figure 3-4.XA Shift Register Generator Configuration ........................................................ 15Figure 3-5.XB Shift Register Generator Configuration ......................................................... 15Figure 3-6.Relative Phases between the XA and XB Sequences ..........................................
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