1111.3708 (Sean T. McWilliams)
Sean T. McWilliams
We present a mission concept, the Geostationary Antenna for Disturbance-Free
Laser Interferometry (GADFLI), for a space-based gravitational-wave
interferometer consisting of three satellites in geostationary orbit around the
Earth. Compared to the nominal design of the Laser Interferometer Space Antenna
(LISA), this concept has the advantages of significantly decreased requirements
on the telescope size and laser power, decreased launch mass, substantially
improved shot noise resulting from the shorter 73000 km armlengths, simplified
and less expensive communications, and an overall lower cost which we (roughly)
estimate at $1.2B. GADFLI preserves much of the science of LISA, particularly
the observation of massive black-hole binary coalescences, although the SNR is
diminished for all masses in the potential designs we consider.
View original:
http://arxiv.org/abs/1111.3708
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