Hellen Systems has assembled a powerful, industry leading team to deliver eLORAN as the backup to GPS. Click on partner logos below for more detail.

HYPERBOLIC SYSTEM

In a hyperbolic system like LORAN, a receiver on an aircraft or ship picks up radio signals broadcast by one or more pairs of radio stations spaced hundreds of miles apart. The system works by measuring the time difference between signals from the two stations. By tuning in different pairs, the navigator could plot lines of position in the form of hyperbolas (arcs) that intersect to give precise location.

 

PUTTING THE LONG RANGE IN LORAN

LORAN receivers picked up signals that were either broadcast directly from stations as "ground waves" or reflected as "sky waves." Sky waves could travel three times farther than ground waves because they reflect off the ionosphere, the layers of charged particles in Earth's upper atmosphere.

 

eLORAN Overview

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