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Q: Fachverband Quantenoptik und Photonik

Q 18: Präzisionsmessungen und Metrologie III

Q 18.7: Talk

Tuesday, March 11, 2008, 15:30–15:45, 3D

Interspacecraft laser ranging for LISA — •Juan Jose Esteban Delgado, Antonio Francisco Garcia Marin, Iouri Bykov, Gerhard Heinzel, and Karsten Danzmann — Albert-Einstein-Institut Hannover, Max-Planck-Institut für Gravitationsphysik*und Universität Hannover

The Laser Interferometer Space Antenna (LISA) is an international space project to detect and observe Gravitational waves in the frequency regime from 0.1 mHz to 100 mHz. LISA is a cluster of three spacecraft separated by five millions kilometers communicating with each other via three bidirectional laser links and forming an equilateral triangle.

The LISA data processing requires ranging between the spacecraft to monitor continuously their huge separation with an absolute precision of ten meters. The laser links are not only used to measure this distance but also to transmit information and clock synchronization between the satellites.

We present a possible implementation of the onboard processing system dedicated to extract the required information from the incoming laser phase using a binary phase shift keying demodulation scheme.