Assertion: relativity | /r/HasProperty | unnecessary
Facets:
value: for gps
type: PURPOSE
Source sentences:
text: While Van Flandern believed that relativity is unnecessary for GPS, he also asserted that observations of GPS satellites supported both general and special relativity, writing that "we can assert with confidence that the predictions of relativity are confirmed to high accuracy over time periods of many days," with unrelated factors interfering with longer-term observations.