USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

global positioning systems

This page shows Department of Transportation content pertaining to a specific tag. If you cannot find what you’re looking for on this page, please use the search box in the top right of our website.

Small Jammers Present Big Problems for GPS

This is a key year for global navigation satellite systems. However, an item that sells for as little as $30 has already caused big problems for this rapidly growing technology and highlights the vulnerability of GPS.

Validated DGPS Systems

INFORMATION: Use of Global Position Systems (GPS) Based Time Space Position Information (TSPI) System as a Truth Source for Certification Flight Testing.

DGPS Performance Requirements

This document outlines the recommendations and requirements to be followed by FAR Part 36 noise certification applicants using a differential global positioning system (DGPS) for collection of time space position information (TSPI).