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Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989nascp3046...89p&link_type=abstract
In NASA, Relativistic Gravitational Experiments in Space p 89-92 (SEE N90-19940 12-90)
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Gravitational Effects, Gravitational Wave Antennas, Polarization (Waves), Radiation Detectors, Structural Weight, Weightlessness, Aerospace Environments, Earth Gravitation, Extremely Low Radio Frequencies, Gravity Gradiometers, Large Space Structures, Resonant Vibration, Space Laboratories, Vibration Isolators
Scientific paper
Earth-based gravitational wave detectors suffer from the need to support the large antenna masses against the earth's gravity without transmitting a significant amount of seismic noise. Passive vibration isolation is difficult to achieve below 1 Hz on the earth. Vibration-free space environment thus gives an opportunity to extend the frequency window of gravitational wave detection to ultralow frequencies. The weightless condition of a space laboratory also enables construction of a highly symmetric multimode antenna which is capable of resolving the direction of the source and the polarization of the incoming wave without resorting to multiantenna coincidence. Two types of earth-orbiting resonant-mass gravitational wave detectors are considered. One is a skyhook gravitational wave detector, proposed by Braginsky and Thorne (1985). The other is a spherical detector, proposed by Forward (1971) and analyzed by Wagoner and Paik (1976).
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