CGSIC ISC Asia-Pacific Meeting Melbourne, Australia February 2003

Overview GPS System Information, Notification, and Reporting Coast Guard Navigation Center Federal Aviation Administration Civil GPS Service Interface Committee

Background Joint GPS User Support Service USCGNISFAANOCC USSPCGSC Established in DOT/DoD MOA, Annex 3 Detailed MOA’s between each organization The Core The Core

NIS Information GPS System design information –SPS Performance Standard –Interface Control Document (ICD-200) Operational Information –NANUs / GPS Status Static Listserver distribution –NIS Mirror Site ( Modernization –Latest updates, L5 & L2 signal specification

NIS Information Radionavigation Policy –Federal Radionavigation Plan –Presidential Decision Directives US Nationwide Differential GPS System –Specifications –High Accuracy DGPS U.S. Loran-C

 GPS General Information  GPS Status Reports  GPS Service Interruptions  GPS Almanac Information  Precise Ephemeris Info  Subscribe to Listserver Messages  Selective Availability  GPS Modernization  Report a GPS Problem  Frequently Asked Questions  Augmentation Systems  Reference Information

 GPS General Information  GPS Status Reports  GPS Service Interruptions  GPS Almanac Information  Precise Ephemeris Info  Subscribe to Listserver Messages  Selective Availability  GPS Modernization  Report a GPS Problem  Frequently Asked Questions  Augmentation Systems  Reference Information GPS Page Choices

 Subscribe to the GPS Status Message and/or the NANU List server  Latest PDOP Chart (displays overall Dilution of Precision Values) Status  Latest GPS Status Message  GPS Status Message Archives NANUs  Active NANUs  NANU Abbreviations and Descriptions  NANU Archives ( )  Search the current year by NANU Number  Search a previous year by NANU Number General Information

Forecast Outages  FCSTDV FCSTMX  FCSTEXTD FCSTSUMM  FCSTCANC FCSTRESCD Unscheduled Outages  UNUSUFN UNUSABLE  UNUNOREF Other  USABINIT LEAPSEC  GENERAL NANU Abbreviations

Outage Reporting Disruption to GPS service should be reported to: –USCG NAVCEN – –On-line form An attempt will be made to identify the problem Report to user

 GPS General Information  GPS Status Reports  GPS Service Interruptions  GPS Almanac Information  Precise Ephemeris Info  Subscribe to Listserver Messages  Selective Availability  GPS Modernization  Report a GPS Problem  Frequently Asked Questions  Augmentation Systems  Reference Information GPS Page Choices

Outage Reporting 1. What indicated there was a problem? 2. How many Satellites were being tracked? 3. What SVs were being track? 4. Elevation of the receiver antenna? 5. Duration and number (approximate) of known occurrences? 6. Did any operator (you) action help? 7. Location of problem? * 8. Closest geographic region* 9. Type of equipment? (receiver model, antenna type, etc...) 10. Type of installation? (boat, car, handheld, plane) 11. Other probable causes? * 12. What was the receiver being used for at time of occurrence? 13. Contact Information

Aviation Information GPS Implementation/ WAAS/ LAAS u GPS NOTAMS u FAA NOCC u International NOTAMs

Useful Links USCG Navigation Center – Interagency GPS Executive Board Executive Secretariat – FAA- WAAS, LAAS –

Navigation Information Service (mirror site) Phone: Fax: Civil GPS Service Interface Committee