Using Hollywood for science: animation of a proposed NASA mission using Maya 4.0
Explore the source record for details and available documents.
supercomputing animation Maya STEP↗
Engineering topics
Worden, P.
Publications and source records attributed to Worden, P..
System Design for the Control of Liquid Helium by Electrostatic Forces for the Step Mission
A greatly improved test of the equivalence of inertial and gravitational mass is now possible, using superconducting measurement technology in an earth-orbiting spacecraft.
equivalence principle electrostatic forces liquid ↗
System Design for the Control of Liquid Helium by Electrostatic Forces for the Satellite Test of Equivalence Principle Mission
Explore the source record for details and available documents.
inertial mass gravitational mass liquid helium cry↗
Gradiometry coexperiments to the gravity probe B and step missions
The Gravity Probe-B (GP-B) spacecraft, designed to test predictions of general relativity, will fly in the mid 1990s. It will carry four electrostatically suspended gyroscopes in a cryogenic environment and will have a drag-free control system to minimize disturbances on the gyroscopes. The Stanford Test of Equivalence Principle (STEP) spacecraft, to fly later, will carry a set of test masses under very similar conditions. The possibility of using differential measurements of the GP-B gyroscopes suspension forces and the STEP tests mass displacement readout to form single-axis gravity gradiometers is explored. It is shown that the noise in the suspension systems is sufficiently small in the relevant frequency range, and that enough information is collected to compensate for the spacecrafts' attitude motion. Finally, using Breakwell's flat-earth approximation, these experiments are compared to other geodesy experiments and predict the contribution they can make to the knowledge of the Earth's geopotential.
Tapley, M.↗