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LISA phase measurement technique

Show simple item record Marcin, M. R. en_US 2004-09-17T07:25:42Z 2004-09-17T07:25:42Z 2002-08-22 en_US
dc.identifier.citation SPIE Astronomical Telescopes and Instrumentation en_US
dc.identifier.citation Waikoloa, HI, USA en_US
dc.identifier.clearanceno 02-1902 en_US
dc.description.abstract The LISA mission will form the equivalent of a Michelson interferometric beat signal from the 1064nm laser beams traversing the inter-spacecraft arms. The design gravitational wave sensitivity requires measurement of round trip path differences for each detector to be about 10 pddHz over a frequency range from 10^10-4 to 10^-1 Hz. Thus LISA'S phasemeter must measure the beat signal phase to 10^-5 cycle/square root of Hz at 1mHz. Doppler shifts between spacecraft in their orbits are expected to range from 1 to 15 MHz. Phase measurement using the digital phase-locked loop approach incorporated in a modified TurboRogue GPS receiver has been investigated in this study. It is found that only resolution in the range of 10^-4 to 10^-3 cycle/square root of Hz at 1 mHz is achievable with this hardware. Abrupt fluctuations in the phase measurement at the millicycle level are responsible for the limitation. en_US
dc.format.extent 3303496 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.subject.other phasemeter LISA GPS TurboRouge en_US
dc.title LISA phase measurement technique en_US

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