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Data processing for LISA's laser interferometer tracking system (LITS)

Ronald W Hellings

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In this paper, we present results on the subject of data processing for LISA. We present, for the first time, time-domain algorithms for the elimination of clock jitter noise algorithms that avoid the singularities of the previous frequency-domain method. We also discuss how to generate the data averages that each spacecraft will eventually need to telemeter to the ground, thereby inferring what a realistic scientific data rate will be for LISA. Finally, we argue, based partly on these results, that a laser interferometer tracking system (LITS) that employs independent lasers in each spacecraft is preferable, for reasons of simplicity, to one in which the lasers in two of the spacecraft are locked to the incoming beam from the third.


PACS

04.80.Nn Gravitational wave detectors and experiments

95.55.Ym Gravitational radiation detectors; mass spectrometers; and other instrumentation and techniques

07.60.Ly Interferometers

95.75.Kk Interferometry

MSC

83C35 Gravitational waves

Subjects

Instrumentation and measurement

Gravitation and cosmology

Astrophysics and astroparticles

Dates

Issue 19 (7 October 2001)

Received 5 July 2001

Published 17 September 2001



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