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Unclassified This page is unclassified when separated from the main document UNLESS OTHERWISE SPECIFIED: NUMBERS ARE REPRESENTED IN DECIMAL FORM. THIS DOCUMENT SPECIFIES TECHNICAL REQUIREMENTS AND NOTHING HEREIN CONTAINED SHALL BE DEEMED TO ALTER THE TERMS OF ANY CONTRACT OR PURCHASE ORDER BETWEEN ALL PARTIES AFFECTED Interface Control Contractor: SAIC GPSW SE&I, 300 N. Sepulveda Blvd., Suite 3000 El Segundo, CA 90245 ICD TITLE: Navstar Next Generation GPS Operational Control Segment (OCX) to User Support Community Interfaces SIZE A SCALE: N/A REV: NCA CODE IDENT 4WNC1 ICD NO. ICD-GPS-870 Unclassified This page is unclassified when separated from the main document
(This page intentionally left blank.) ii ICD-GPS-870 13 Aug 201023 June 2011
Page 1: Unclassified This page is unclassif
Page 5 and 6: TABLE OF CONTENTS 1 SCOPE..........
Page 7 and 8: TABLE OF FIGURES Figure 1 GPS OCX t
Page 9 and 10: 1 SCOPE 1.1 Scope This Interface Co
Page 11 and 12: 2 APPLICABLE DOCUMENTS 2.1 Governme
Page 13 and 14: 3 REQUIREMENTS 3.1 Interface Identi
Page 15 and 16: interface function. The term “MCS
Page 17 and 18: The GPS OCX uploads the NANU, Opera
Page 19 and 20: ICC ICD ICWG ID IP IS JDAY LEAPSEC
Page 21 and 22: 7 APPROVAL The signatories have app
Page 23 and 24: Section # Requirement Title Verific
Page 25 and 26: NANU ACRONYM FCSTUUFN NAME Forecast
Page 27 and 28: NOTICE ADVISORY TO NAVSTAR USERS (N
Page 37 and 38: 10.410.3 NANU Message Format The NA
Page 39 and 40: 10.4.2.110.3.2.1 NANU Message Descr
Page 41 and 42: 10.4.2.310.3.2.3 Satellite Identifi
Page 43 and 44: 10.4.310.3.3 NANU Section Two2 As s
Page 45 and 46: Figure 20-1 Sample Operational Advi
Page 47 and 48: Figure 20-3 OA Section One1 20.4 OA
Page 49 and 50: 20-6 ICD-GPS-870 23 June 201113 Aug
Page 51 and 52: SV Health Category Six Bit SV Healt
Page 53 and 54:
CURRENT.AL3 032 Figure 30-1 SEM Dat
Page 55 and 56:
Line No b c R-5 d e Table 30-IIIIIT
Page 57 and 58:
******** Week 175 almanac for PRN-0
Page 59 and 60:
Table 40-II identifies the characte
Page 61 and 62:
60 APPENDIX 46: LETTERS OF EXCEPTIO
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Unclassified Unclassified - GPS.gov

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