Time-delay interferometry and the relativistic treatment of LISA optical links

Dhurandhar, S. V. (2009) Time-delay interferometry and the relativistic treatment of LISA optical links Journal of Physics: Conference Series, 154 (1). 012047_1-012047_8. ISSN 1742-6588

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Official URL: http://iopscience.iop.org/1742-6596/154/1/012047

Related URL: http://dx.doi.org/10.1088/1742-6596/154/1/012047

Abstract

In order to attain the requisite sensitivity for LISA - a joint space mission of the ESA and NASA- the laser frequency noise must be suppressed below the secondary noises such as the optical path noise, acceleration noise etc. By combining six appropriately time-delayed data streams containing fractional Doppler shifts - a technique called time delay interferometry (TDI) - the laser frequency noise may be adequately suppressed. Here we investigate the problem of TDI in the general case of unequal up-down links and also include the effect of the Earth on the spacecraft and the optical links. We show that there are symmetries in the physics which can be successfully used to simplify the algebra of the TDI. We finally give the example of the first generation modified Sagnac observable in which the laser frequency noise is suppressed because of the symmetries.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics Publishing.
ID Code:9777
Deposited On:02 Nov 2010 04:07
Last Modified:16 May 2016 19:31

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