Abstract
LISA Pathfinder is an in-flight test of the local sources of acceleration noise in LISA. The acceleration noise level in LISA Pathfinder is measured by the residual differential acceleration Δg between the two test masses once the coupling to the spacecraft motion has been removed. The full process from raw data to Δg passes through a series of calibration experiments and different data elaboration procedure which are thoroughly used during the mission and represent the baseline for any other further investigation.
Highlights
Laser Interferometer Space Antenna [2] (LISA) Pathfinder[1] (LPF) is an European Space Agency (ESA) satellite launched on December
To be able to measure gravitational waves it is necessary to measure the relative displacement between TMs with the required precision and to be able to put the TMs in the most quiet possible free-fall. This last requirements for LISA is encoded in the density Sg1/2
The quality of the free fall depends both on the the drag-free control and on the spurious forces that act on the TMs, which are local sources of noise in LISA and hardly testable or measurable on ground
Summary
LISA Pathfinder[1] (LPF) is an European Space Agency (ESA) satellite launched on December. The quality of the free fall depends both on the the drag-free control and on the spurious forces that act on the TMs, which are local sources of noise in LISA and hardly testable or measurable on ground. For this reason ESA decided to launch LPF, a technological demostrator of the local sources of noise on LISA.
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