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<http://webisa.webdatacommons.org/prov/361426701>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/64270807> .
<http://webisa.webdatacommons.org/64270807>	<http://www.w3.org/ns/prov#value>	"Similarly, the raw navigation, altitude, and other data collected are compared with readings from the base station and if necessary, adjusted (block 202)." .