Computer Science – Performance
Scientific paper
Nov 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.542..205d&link_type=abstract
In: Proceedings of the Fifth IAA International Conference on Low-Cost Planetary Missions, 24-26 September 2003, Noordwijk, The N
Computer Science
Performance
Space Missions, Relativity Theory, Tests
Scientific paper
Science goals: The mission OPTIS aims at testing the foundations of Special and General Relativity by up to three orders of improvement. The individual tests are - the isotropy and constancy of the speed of light, the time dilation (or Doppler effect), the universality of the gravitational red shift with various combinations of high precision clocks. Furthermore, laser tracking allows a much improved test of the Lense-Thirring effect, of the perigee advance and a search for deviations from Newtonian gravity. Preconditions: Basic for the performance of this mission is the availablility of that technologies which have been used recently to carry through the most precise tests of Special Relativity. The precision of these tests can be further increased under space conditions thanks to longer integration times, larger changes in the orbital velocity and larger differences of the gravitational potential. Furthermore, very precise laser tracking and linking of satellites is a well established technique and will provide, in combination with the active drag-free control system, very acurate orbit data. The technologies: The core technologies for OPTIS are optical cavities, highly stabilized lasers, capacitive gravitational reference sensors, drag-free control, ion clocks, frequency combs, laser tracking systems. These technologies are also key technologies for other future missions.
Dittus Hansjoerg
L{ä}mmerzahl Claus
Peters Achim
Schiller Stephan
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