verylowfrequency(VLF)radiowaves

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DARPA Pursuing Global Positioning System Alternatives

The Defense Advanced Research Projects Agency is looking to develop alternative positioning, navigation and timing capabilities. Dave Tremper, a program manager at the agency’s strategic technology office, said relying solely on GPS provides users with a single point of failure. “GPS is so good that it’s kind of knocked all of the other players off

NASA Space Probes Detect Human-Made Bubble Surrounding Earth

Humans have long been shaping Earth’s landscape, but now scientists know we can shape our near-space environment as well. A certain type of communications – very low frequency (VLF) radio communications – have been found to interact with particles in space, affecting how and where they move. At times, these interactions can create a barrier