GPS: The Global Positioning System

How to Correct Your Address in GPS Devices, Apps, & Online Maps

Do GPS devices show your home or business in the wrong place? The problem is not GPS! It's the mapping software.

Common Questions

• How do I add or correct my address in GPS devices, apps, and maps?
• What can I do about trucks driving through my neighborhood?
• How do I report GPS service outages?
• Can GPS help me find my lost phone?
• How does GPS work?
• How accurate is GPS?
• How vulnerable is GPS to malicious jamming?

Featured Content

• What is GPS?
• How GPS Works
• Truckers: Don't Use Consumer GPS Devices!
• GPS Jamming is Illegal

What's Hot for Pros

• Technical documentation
  • New IRNs for public comment
    (by Dec 18)
  • GPS interface specifications
  • Updated PRN code assignments
• Adjacent band compatibility
  • Advisory board topic papers
  • Advisory board letter regarding Ligado (PDF)
• Funding & legislation
  • National Timing Resilience and Security Act
• Recent presentations
  • PNT advisory board, Dec 5-6
  • ICG-13 (China), Nov 4-9

News Items

• Jan 25: GPS Testing Notice Concerning the GPS Week Number Rollover
• Dec 23: First GPS III Satellite Successfully Launched
• Dec 13: GPS III Space Vehicle 01 Is Encapsulated in the Falcon 9 Payload Fairing
• Nov 29: PNT Advisory Board Meeting Agenda

New Additions to GPS.gov

• Dec 12: New GPS III videos
• Dec 5: Advisory board presentations
• Nov 29: Advisory board meeting agenda
• Nov 5: ICG-13 presentations

Guidance for Critical Infrastructures

• Responsible Use of GPS for Critical Infrastructure - Dec 2017 (PDF)
• Best Practices for Improving the Operation and Development of GPS Equipment Used by Critical Infrastructure - Jan 2017 (PDF)
• Best Practices for Improved Robustness of Time and Frequency Sources in Fixed Locations - Jan 2015 (PDF)

Report/Lookup GPS
Service Disruptions