The deployment of military GNSS jammers like the Russian Army’s R-330Zh Zhitel system to the Syrian theatre of operations has caused headaches for civilian satellite navigation system users in the Mediterranean.

The NTS-2 was the first demonstration satellite which comprised part of the NAVSTAR GPS constellation. The spacecraft was designed and built by the US Naval Research Laboratory and launched from Vandenburg airbase, California on 23rd June 1977.
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