|
gptkbp:instanceOf
|
gptkb:satellite
scientific research
|
|
gptkbp:apogee
|
642 km
|
|
gptkbp:countryOfOrigin
|
gptkb:United_States
|
|
gptkbp:duration
|
1 year (science phase)
|
|
gptkbp:endDate
|
2005-08-15
|
|
gptkbp:fundedBy
|
gptkb:NASA
gptkb:Stanford_University
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Gravity Probe B
|
|
gptkbp:inclination
|
90.0 degrees
|
|
gptkbp:launchDate
|
2004-04-20
|
|
gptkbp:launchSite
|
gptkb:Vandenberg_Air_Force_Base
|
|
gptkbp:launchVehicle
|
gptkb:Delta_II
|
|
gptkbp:manufacturer
|
gptkb:Lockheed_Martin
|
|
gptkbp:mass
|
3,100 kg
|
|
gptkbp:missionType
|
space science
|
|
gptkbp:notableAchievement
|
confirmed frame-dragging effect
confirmed geodetic effect
|
|
gptkbp:operator
|
gptkb:NASA
|
|
gptkbp:orbitType
|
low Earth orbit
|
|
gptkbp:payload
|
astronomer
gyroscopes
|
|
gptkbp:perihelion
|
642 km
|
|
gptkbp:powers
|
330 watts
|
|
gptkbp:principalInvestigator
|
gptkb:Francis_Everitt
|
|
gptkbp:purpose
|
test general relativity
measure frame-dragging
measure geodetic effect
|
|
gptkbp:relatedTo
|
gptkb:Albert_Einstein
gptkb:Stanford_University
gptkb:general_relativity
|
|
gptkbp:releaseDate
|
2011
|
|
gptkbp:startYear
|
1960s
|
|
gptkbp:status
|
mission complete
|
|
gptkbp:website
|
https://einstein.stanford.edu/
|
|
gptkbp:bfsParent
|
gptkb:Lense–Thirring_effect
gptkb:Delta_rocket_family
gptkb:Delta_II
|
|
gptkbp:bfsLayer
|
5
|