OTHR EIS
US Air Force logo

Homeland Defense Over-the-Horizon Radar
at Northwest Region United States
Environmental Impact Statement

A diagram depicting transmission of radio signals for radar from a transmitter. They go up to the ionosphere, back down to the earth's surface, and, if it hits an object, it bounces back to the ionosphere and then to the receiver.

Comment Form

Thank you for your interest in the Homeland Defense Over-the-Horizon Radar Environmental Impact Statement (EIS).  The Draft EIS comment period is now closed.