No audio available for this content. Less than three weeks after its launch, the first GPS III satellite, SVN74, started transmitting navigation signals. SVN74 uses the pseudorandom noise (PRN) code ...
No audio available for this content. QZS-R1 is prepped for testing. At left is the Earth-oriented surface that hosts the L-band antenna. (Photo: JAXA) By Peter Steigenberger, Steffen Thoelert, Sergei ...
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