IS-GPS-200E 8 June 2010 GLOBAL POSITIONING SYSTEM WING (GPSW) SYSTEMS ENGINEERING & INTEGRATION INTERFACE SPECIFICATION IS-GPS-200 Revision E Navstar GPS Space Segment/Navigation User Interfaces AUTHENTICATED BY: ____________________________________ DAVID B. GOLDSTEIN, Col Chief Engineer Global Positioning Systems Wing DISTRIBUTION STATEMENT A.: Approved for Public Release; Distribution is Unlimited. DESCRIPTION DATE ICD-GPS-200, Initial Release 25 Jan 1983 ICD-GPS-200A 25 Sep 1984 ICD-GPS-200B 30 Nov 1987 ICD-GPS-200C 10 Oct 1993 IS-GPS-200D 7 Dec 2004 IRN-200D-001 7 Mar 2006 IS-GPS-200E 8 June 2010 DISTRIBUTION A. APPROVED FOR PUBLIC RELEASE; DISTRIBUTION IS UNLIMITED APPROVALS AUTHORIZED SIGNATURES REPRESENTING DATE Signature on File GPS Wing (GPSW) 8 June 2010 Space & Missiles Center (SMC) – GPSW LAAFB INTERFACE SPECIFICATION THIS DOCUMENT SPECIFIES TECHNICAL ICD TITLE REQUIREMENTS AND NOTHING HEREIN CONTAINED SHALL BE DEEMED TO ALTER THE Navstar GPS Space Segment/Navigation User TERMS OF ANY CONTRACT OR PURCHASE ORDER BETWEEN ALL PARTIES AFFECTED. Interfaces Prepared by: DOCUMENT NO. Science Applications International Corporation IS-GPS-200 GPSW SE&I 300 N. Sepulveda Blvd., Suite 3000. CODE IDENT NO. REV SHEET I El Segundo, CA 90245 4WNC1 E ii IS-GPS-200E 8 June 2010 REVISION RECORD REV DESCRIPTION DOCUMENT APPROVED DATE NC Initial Release 25 Jan 1983 A Incorporates IRN-200NC-001, IRN-200NC-002, and IRN- 25 Sep 1984 200NC-003 B Incorporates IRN-200A-001A 30 Nov 1987 C Incorporates IRN-200B-001 thru IRN-200B-007 10 Oct 1993 C Re-formatted in Microsoft Word 6.0 in GEMS compatible format 10 Oct 1993 12 Jan 1996 C Changed distribution status to Public Release 25 Sep 1997 20 Oct 1997 D Incorporates IRN-200C-001 thru IRN-200C-005R1, change ICD- 7 Dec 2004 23 Nov 2004 GPS-200 to IS-GPS-200, introduce and specify the requirements of Improved Clock and Ephemeris (ICE) message for L2 C signal, and other additional updates IRN- Adds additional PRN sequences to Section 6 7 Mar 2006 9 Mar 2006 200D- 001 E GPS IIIA Incorporations 8 Jun 2010 8 June 2010 N/A SE&I Tech Pubs 29 July 2010 iii IS-GPS-200E 8 June 2010 TABLE OF CONTENTS 1. INTRODUCTION .................................................................................................................................................. 1 1.1 Scope ........................................................................................................................................................ 1 1.2 IS Approval and Changes ......................................................................................................................... 1 2. APPLICABLE DOCUMENTS .............................................................................................................................. 2 2.1 Government Documents ........................................................................................................................... 2 2.2 Non-Government Documents ................................................................................................................... 2 3. REQUIREMENTS ................................................................................................................................................. 3 3.1 Interface Definition .................................................................................................................................. 3 3.2 Interface Identification ............................................................................................................................. 3 3.2.1 Ranging Codes ........................................................................................................................ 3 3.2.2 NAV Data ............................................................................................................................... 9 3.2.3 L1/L2 Signal Structure .......................................................................................................... 10 3.3 Interface Criteria..................................................................................................................................... 12 3.3.1 Composite Signal .................................................................................................................. 12 3.3.2 PRN Code Characteristics ..................................................................................................... 17 3.3.3 Navigation Data .................................................................................................................... 33 3.3.4 GPS Time and SV Z-Count ................................................................................................... 35 4. NOT APPLICABLE ............................................................................................................................................. 37 5. NOT APPLICABLE ............................................................................................................................................. 38 6. NOTES................................................................................................................................................................... 39 6.1 Acronyms ............................................................................................................................................... 39 6.2 Definitions .............................................................................................................................................. 42 6.2.1 User Range Accuracy ............................................................................................................ 42 6.2.2 SV Block Definitions ............................................................................................................ 42 6.2.3 Operational Interval Definitions............................................................................................ 43 6.2.4 GPS Week Number ............................................................................................................... 44 6.2.5 L5 Civil Signal ...................................................................................................................... 44 6.3 Supporting Material ................................................................................................................................ 44 6.3.1 Received Signals ................................................................................................................... 44 6.3.2 Extended Navigation Mode (Block II/IIA) ........................................................................... 46 6.3.4 Block IIA Mode (Block IIR/IIR-M) ...................................................................................... 47 6.3.5 Autonomous Navigation Mode ............................................................................................. 47 6.3.6 PRN Code sequences expansion ........................................................................................... 47 6.3.7 Pre-Operational Use .............................................................................................................. 57 10. APPENDIX I. LETTERS OF EXCEPTION ................................................................................................... 58 10.1 Scope .................................................................................................................................................... 58 iv IS-GPS-200E 8 June 2010 10.2 Applicable Documents ......................................................................................................................... 58 10.3 Letters of Exception ............................................................................................................................. 58 20. APPENDIX II. GPS NAVIGATION DATA STRUCTURE FOR DATA, D(t) ........................................... 67 20.1 Scope .................................................................................................................................................... 67 20.2 Applicable Documents. ........................................................................................................................ 67 20.2.1 Government Documents ...................................................................................................... 67 20.2.2 Non-Government Documents ............................................................................................. 67 20.3 Requirements ........................................................................................................................................ 68 20.3.1 Data Characteristics ............................................................................................................ 68 20.3.2 Message Structure ............................................................................................................... 68 20.3.3 Message Content ................................................................................................................. 79 20.3.4 Timing Relationships ........................................................................................................ 118 20.3.5 Data Frame Parity ............................................................................................................. 125 30. APPENDIX III. GPS NAVIGATION DATA STRUCTURE FOR CNAV DATA, DC(t).......................... 128 30.1 Scope .................................................................................................................................................