ICD-GPS-870 - GPS.gov

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3 REQUIREMENTS 3.1 Interface Identification This ICD defines the interfaces between the Global Positioning System (GPS) Control Segment and the GPS User and User-support communities during the GPS Next Generation Operational Control System (OCX) era. The files provided by the GPS CS to these GPS Users are the Almanacs, Operational Advisories (OAs), Anti-Spoofing (A- S) Status, and the Notice Advisory to Navstar Users (NANUs) corresponding to all legacy signals and the new Civil signals L1C, L2C and L5. The GPS CS provides these data files to a TBD Web Server, residing outside of OCX, for further distribution. The primary means for distribution of the data that is generated by the GPS CS is via electronic mail (e-mail), Internet and SIPRNet. Figure 1 captures the interfaces defined in this ICD. The point of demarcation separates the end Users from OCX and Department of Defense (DoD) systems that provide the files. Figure 1 GPS CS to the GPS User Community The interfaces defined in this ICD are listed in Table I, in the form of an information exchange matrix. 5 ICD-GPS-870 15 June 2011
Producer Consumer Data Exchange Identification GPS CS DHS USCG / DOT FAA/ Other Civil Users* GPS CS DHS USCG / DOT FAA/ Other Civil Users GPS CS DHS USCG / DOT FAA/ Other Civil Users GPS CS DHS USCG / DOT FAA/ Other Civil Users GPS CS Military User Community GPS CS Military User Community GPS CS Military User Community GPS CS Military User Community Table I Information Exchange Matrix GPS Status Information GPS Constellation Status Summary GPS Constellation Anti-Spoofing Status GPS Constellation Orbital and Performance Parameters, and SV Signal Health Status GPS Status Information GPS Constellation Status Summary GPS Constellation Anti-Spoofing Status GPS Constellation Orbital and Performance Parameters, and SV Signal Health Status 6 Information Description Nature of Transaction NANU Transmit via E-Mail and Post to Internet Website OA Post to Internet Website A-S Status Post to Internet Website Almanac Post to Internet Website NANU Post to Internet and SIPRNet Websites OA Post to Internet and SIPRNet Websites A-S Status Post to Internet and SIPRNet Websites Almanac Post to Internet and SIPRNet Websites Note: * Automatic NANUs are also sent to other 2 SOPS approved GPS Users via e-mail Security Unclassified Unclassified Unclassified Unclassified Unclassified Unclassified Unclassified Unclassified 3.1.1 GPS Control Segment The GPS CS is operated by the 2d Space Operations Squadron (2 SOPS), administratively organized under 50 th Space Wing (50 SW). The GPS CS operations are performed primarily via the Master Control Station (MCS), Alternate Master Control Station (AMCS), Monitor Stations (MS), and Ground Antennas (GA). The MCS, located at Schriever Air Force Base (SAFB), is the central control point for ICD-GPS-870 15 June 2011
Page 1: AUTHORITY DESCRIPTION I DATE RFC-00
Page 7 and 8: REVISION RECORD LTR DESCRIPTION DAT
Page 9 and 10: 10.3.2.1 NANU Message Description .
Page 11 and 12: TABLES Table I Information Exchange
Page 13 and 14: 1.2 Key Events The major milestone
Page 15: MOA February 1996 MOA February 2010
Page 19 and 20: Detailed data formats of the OA dat
Page 21 and 22: 3.3.2 GPS CS to GPS User Support Co
Page 23 and 24: HTTPS Hypertext Transfer Protocol S
Page 25 and 26: 7 APPROVAL The signatories have app
Page 27 and 28: The message templates for the NANU
Page 29 and 30: NOTICE ADVISORY TO NAVSTAR USERS (N
Page 33 and 34: Figure 10-11 General Message Format
Page 37 and 38: The NANU message structure for all
Page 39 and 40: 10.3.2.1 NANU Message Description T
Page 41 and 42: 10.3.3 NANU Section 2 As shown in F
Page 43 and 44: 20.2 OA Header. The header includes
Page 45 and 46: 30 APPENDIX 3: ALMANAC DATA FILES A
Page 47 and 48: SV Health Six Bit SV Health Word Nu
Page 49 and 50: Line No Table 30-II SEM Almanac Des
Page 51 and 52: Line No Table 30-II SEM Almanac Des
Page 53 and 54: ******** Week 175 almanac for PRN-0
Page 55 and 56: Table 40-II ESHS Description Line P
Page 57: 60 APPENDIX 6: LETTERS OF EXCEPTION

ICD-GPS-870 - GPS.gov

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