WASHINGTON — Rhea Space Activity, a Washington, D.C.-based space technology startup, has raised $6 million in a Series A funding round to advance navigation software designed to operate without GPS, ...

Imagine having to find your way with only a compass and the stars and being handed a GPS. This is what David Marpaung and colleagues have just done for designers of light-based chips. Through their ...

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We’ve come to expect the U.S.-based global positioning system (GPS) to be available and ubiquitous for the countless military, commercial, and consumer applications dependent on it. Its diverse uses ...