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- Topic: Satellite Navigation
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Artifact
The Motorola LGT 1000 was used for better accuracy by scientists.
Artifact
In the 1990s, the NIST-7 was the most accurate clock in the country and helped keep the GPS clocks synchronized.
Artifact
The Astroinertial Navigation System provided rapid celestial navigation fixes for the SR-71.
Artifact
A rubidium clock like this was tested on the NTS-2 satellite to see if clocks could keep accurate time in space.
Photograph
The NTS-2 Development Team at the Naval Research Laboratory.
Illustration
This illustration shows the important components of the NTS-2 satellite.
Photograph
Engineers discussing the Global Positioning System.
Illustration
All three (positioning, navigation, and timing) are used together with map data and other information (weather or traffic data, for instance) in modern navigation systems.
Artifact
The PLGR was smaller and lighter than the older Manpack GPS receiver.
Artifact
This prototype satellite signal receiver was developed around 1976.
