About: http://webisa.webdatacommons.org/128771500

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	Referring to FIG. 4c-2, a radar altimeter 21 is a kind of altitude measurement device 20, which measures the altitude from the terrain to the vehicle which is called terrain altitude.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com