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Ensuring That GPS Testing Is An Inside Job

Most people have experienced the frustration of not being able to receive a mobile phone signal while indoors; it’s even more irritating when there’s a perfectly usable signal just outside the door.

The situation is usually caused by the structure of the building; the signals just can’t penetrate through the walls. Ironically it’s often modern insulating materials such as foil-backed insulation that prevent the ingress of signal and makes it necessary to go outside in the cold to make a call.

Nowadays of course mobile devices aren’t just phones; they perform a vast range of other functions, some of which rely on the reception of GPS satellite signals which are usually only available outside the building.

Who Needs An Indoor GPS Signal?

First – let’s define a GPS Repeater System: A repeater is a device that relays GPS signals to any indoor location that isn’t normally reachable.

There is an outdoor antenna to pick up the GPS satellite signals from your rooftop, and a coaxial cable that carries the signal inside the building to a small, mains-powered, repeater unit.

The repeater unit re-radiates the GPS signal inside the building, generally covering a diameter of up to 20 metres.

Consider the following applications and see if any other situations where indoor GPS signal would be useful (or even crucial) spring to mind.