About: http://webisa.webdatacommons.org/369934512

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	Elements a1 and a2, at distances r1, r2 respectively, are transmitting elements, while the element a0 at r0 is a reference element which receives a pilot signal ??i0.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr