<http://schema.org/description>
"Instead of creating a fleet of GPS-type satellites, why not broadcast the signals from the ground and route them through existing communications satellites? Indeed, China has already tested the idea"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.technologyreview.com/s/507871/china-developing-gps-on-a-shoestring-plan/>