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global positioning systems

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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).