About: http://webisa.webdatacommons.org/19545895

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	For GPS, different error sources are usually binned into different categories, such as Signal-In-Space (SIS), Atmosphere, Receiver, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	agi.com