Интерфейсный документ GPS
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NAVSTAR GLOBAL POSITIONING SYSTEMINTERFACE SPECIFICATIONIS-GPS-200Revision D7 December 2004Navstar GPS Space Segment/Navigation User InterfacesGPS JOINT PROGRAM OFFICEHeadquartersSpace and Missile Systems Center (SMC)Navstar GPS Joint Program Office (SMC/GP)2420 Vela Way, Suite 1866El Segundo, CA 90245-4659U.S.A.ByARINC Engineering Services, LLC2250 E. Imperial Highway, Suite 450El Segundo, CA 90245U.S.A.Cage Code: 0VYX1DISTRIBUTION STATEMENT A.
APPROVED FOR PUBLIC RELEASE; DISTRIBUTION IS UNLIMITED(This page intentionally left blank.)IS-GPS-200D7 Dec 2004iiREVISION RECORDLTRNCDESCRIPTIONDATEAPPROVEDInitial Release25 Jan 1983AIncorporates IRN-200NC-001, IRN-200NC-002, and IRN200NC-00325 Sep 1984BIncorporates IRN-200A-001A30 Nov 1987CIncorporates IRN-200B-001 thru IRN-200B-00710 Oct 1993CRe-formatted in Microsoft Word 6.0 in GEMS compatibleformat10 Oct 199312 Jan 1996CChanged distribution status to Public Release25 Sep 199720 Oct 1997DIncorporates IRN-200C-001 thru IRN-200C-005R1, changeICD-GPS-200 to IS-GPS-200, introduce and specify therequirements of Improved Clock and Ephemeris (ICE)message for L2 C signal, and other additional updates7 Dec 200423 Nov 2004IS-GPS-200D7 Dec 2004iii(This page intentionally left blank.)IS-GPS-200D7 Dec 2004ivPage Revision RecordPagesRevisionPagesRevisionIS-GPS-200D7 Dec 2004v(This page intentionally left blank.)IS-GPS-200D7 Dec 2004viTABLE OF CONTENTS1.
SCOPE.....................................................................................................................................................................11.1 Scope ...............................................................................................................................................................11.2 IS Approval and Changes ................................................................................................................................12.
APPLICABLE DOCUMENTS..............................................................................................................................22.1 Government Documents ..................................................................................................................................32.2 Non-Government Documents..........................................................................................................................33. REQUIREMENTS .................................................................................................................................................43.1 Interface Definition .........................................................................................................................................53.2 Interface Identification ....................................................................................................................................53.2.1 Ranging Codes ......................................................................................................................................53.2.1.1 P-Code.........................................................................................................................................63.2.1.2 Y-Code ........................................................................................................................................63.2.1.3 C/A-Code ....................................................................................................................................63.2.1.4 L2 CM-Code (IIR-M, IIF, and subsequent blocks) .....................................................................63.2.1.5 L2 CL-Code (IIR-M, IIF, and subsequent blocks) ......................................................................63.2.1.6 Non-Standard Codes .................................................................................................................113.2.2 NAV Data............................................................................................................................................113.2.3 L1/L2 Signal Structure ........................................................................................................................123.3 Interface Criteria............................................................................................................................................143.3.1 Composite Signal ................................................................................................................................143.3.1.1 Frequency Plan..........................................................................................................................143.3.1.2 Correlation Loss ........................................................................................................................143.3.1.3 Carrier Phase Noise...................................................................................................................143.3.1.4 Spurious Transmissions.............................................................................................................143.3.1.5 Phase Quadrature.......................................................................................................................153.3.1.6 User-Received Signal Levels ....................................................................................................153.3.1.7 Equipment Group Delay............................................................................................................173.3.1.7.1 Group Delay Uncertainty ................................................................................................173.3.1.7.2 Group Delay Differential ................................................................................................173.3.1.8 Signal Coherence.......................................................................................................................173.3.1.9 Signal Polarization ....................................................................................................................173.3.2 PRN Code Characteristics ...................................................................................................................183.3.2.1 Code Structure...........................................................................................................................18IS-GPS-200D7 Dec 2004vii3.3.2.2 P-Code Generation ....................................................................................................................203.3.2.3 C/A-Code Generation................................................................................................................303.3.2.4 L2 CM-/L2 CL-Code Generation..............................................................................................353.3.3 Navigation Data...................................................................................................................................383.3.3.1 Navigation Data Modulation (L2 CM)......................................................................................383.3.3.1.1 Forward Error Correction................................................................................................383.3.4 GPS Time and SV Z-Count.................................................................................................................404.
NOT APPLICABLE.............................................................................................................................................435. NOT APPLICABLE.............................................................................................................................................456. NOTES...................................................................................................................................................................476.1 Acronyms ......................................................................................................................................................476.2 Definitions .....................................................................................................................................................516.2.1 User Range Accuracy..........................................................................................................................516.2.2 SV Block Definitions ..........................................................................................................................516.2.2.1 Developmental SVs...................................................................................................................516.2.2.2 Operational SVs ........................................................................................................................516.2.2.2.1 Block II SVs....................................................................................................................516.2.2.2.2 Block IIA SVs.................................................................................................................516.2.2.2.3 Block IIR SVs .................................................................................................................526.2.2.2.4 Block IIR-M SVs ............................................................................................................526.2.2.2.5 Block IIF SVs..................................................................................................................526.2.3 Operational Interval Definitions..........................................................................................................526.2.3.1 Normal Operations ....................................................................................................................526.2.3.2 Short-term Extended Operations ...............................................................................................526.2.3.3 Long-term Extended Operations ...............................................................................................526.2.4 GPS Week Number .............................................................................................................................536.2.5 L5 Civil Signal ....................................................................................................................................536.3 Supporting Material.......................................................................................................................................536.3.1 Received Signals .................................................................................................................................536.3.2 Extended Navigation Mode (Block II/IIA)..........................................................................................556.3.3 Block IIA Mode (Block IIR/IIR-M)....................................................................................................566.3.4 Autonomous Navigation Mode ...........................................................................................................5610.
