Relativistic approach of the LISA mission

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Astrometric And Interferometric Instruments, Gravitational Radiation Detectors, Mass Spectrometers, And Other Instrumentation And Techniques, Spaceborne And Space Research Instruments, Apparatus, And Components

Scientific paper

The three LISA spacecraft aim at the interferometric detection of gravitational waves in the [10-4, 10-1] Hz band. They are to be launched in 2014, 5 million kilometers appart, in a triangular configuration, orbiting around the Sun. This work in progress deals with the development of a simulator for the LISA mission (LISACode). It requires a description of orbitography and optical links in a native relativistic framework. The corresponding time delays, crucial for the TDI (Time Delay Interferometry), are provided including Sagnac and relativistic Doppler effects. The frequency shift of photons is also given. We further discuss planetary effets on photon flight time.

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