PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • All satellite based communications pass through the Ionosphere on the way to and back from the satellite, as does GPS. Back in 1990, when the US Navy and Air Force proposed the project, HF radio was a key part of their communications network.
http://www.w3.org/ns/prov#wasQuotedFrom
  • engineeringradio.us