CGSIC ISC AsiaPacific Meeting

1
GPS Information Sources

• CGSIC ISC Asia-Pacific Meeting
• Melbourne, Australia
• 10-11 February 2003

2
Overview

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

3
Background
The Core
4
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 (http//www.nis-mirror.com/)
• Modernization
• Latest updates, L5 L2 signal specification

5
NIS Information

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

6

• 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

7
GPS Page Choices

• 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

8
General Information

• 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 (1990-2001)
• Search the current year by NANU Number
• Search a previous year by NANU Number

9
NANU Abbreviations

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

10
Outage Reporting

• Disruption to GPS service should be reported to
• USCG NAVCEN
• http//www.navcen.uscg.gov
• On-line form
• An attempt will be made to identify the problem
• Report to user

11
GPS Page Choices

• 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

12
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

13
Aviation Information

• GPS Implementation/ WAAS/ LAAS
• http//gps.faa.gov/
• GPS NOTAMS
• FAA NOCC
• International NOTAMs

14
Useful Links

• USCG Navigation Center
• http//www.navcen.uscg.gov
• Interagency GPS Executive Board Executive
  Secretariat
• http//www.igeb.gov
• FAA- WAAS, LAAS
• http//www.gps.faa.gov

15

• Navigation Information Service
• http//www.navcen.uscg.gov
• http//www.nis-mirror.com (mirror site)
• E-mail nisws_at_navcen.uscg.mil
• Phone [phone]
• Fax [phone]
• Civil GPS Service Interface Committee
• E-mail rcasswell_at_navcen.uscg.mil