About: http://webisa.webdatacommons.org/375932015

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This problem is particularly troublesome when short circuits that rely on NVIS (Near Vertical Incidence Skywave) propagation must be accommodated.
http://www.w3.org/ns/prov#wasQuotedFrom	hfradio.org