Astrophysics
Gravity Probe B (GP-B) was a satellite-based experiment to test two unverified predictions of general relativity: the geodetic effect and frame-dragging. This was to be accomplished by measuring, very precisely, tiny changes in the direction of spin of four gyroscopes contained in an Earth-orbiting satellite at 650 km (400 mi) altitude, crossing directly over the poles.
Orbital Attempt
#4,653
USAF Mission
#1,060
Pad Launch
#71
Location Launch
#617
Designator
2004-014
Apr 20, 2004, 4:57 PM
1 update
Vandenberg Space Force Base is a United States Space Force Base in Santa Barbara County, California. Established in 1941, Vandenberg Space Force Base is a space launch base, launching spacecraft from the Western Range, and also performs missile testing. The United States Space Force's Space Launch Delta 30 serves as the host delta for the base, equivalent to an Air Force air base wing. In addition to its military space launch mission, Vandenberg Space Force Base also hosts space launches for civil and commercial space entities, such as NASA and SpaceX.
Timezone
America/Los_Angeles
Local Launch Time
Apr 20, 2004, 9:57 AM
Total Launches
900
Total Landings
35
Coordinates
34.7513, -120.5202
