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Meeting	ACGS Committee Meeting 119 - Fairborn, OH - March 2017
Agenda Location	7 SUBCOMMITTEE B – MISSILES AND SPACE 7.1 Precision Inertial sensors and drag-free control for the Laser Interferometer Space Antenna
Title	Precision Inertial sensors and drag-free control for the Laser Interferometer Space Antenna
Presenter	John W. Conklin
Affiliation	University of Florida
Available Downloads*	presentation
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Abstract	The Precision Space Systems Lab (PSSL) at University of Florida focus on: - Precision Timing / Opto-Electronics, Communications - Inertial Sensors and Drag Free Systems Sensing Gravitation Waves – small gravitational radiation signal that are extremely weak (very small to measure, 10^-21) Measuring gravitational waves: - Requires testing particles in near free fall by measuring separation. - Advanced LIGO (Laser Interferometer Gravitational-wave Observatory) - Observatories developed at large distances from each other (1 facility in Louisiana, 1 facility in Washington state) used to detect gravitational waves. Large distances enables common mode to remove any local disturbances (environmental, trains, etc). - The source of the gravitational waves – two black holes that are 1.3 billion lightyears from Earth. Rotational rate during the merger of black holes is at approximately 200Hz. The two black holes were 29 and 36 solar masses, after merger, they release 3 solar masses dissipated through gravitational waves. LISA (Laser Interferometer Space Antenna) – “Hubble-class Observatory”. Three drag-free spacecraft that fly in a triangle each separated by 2.5 million km. - Laser interferometers measure distances between each space craft. Technology was demonstrated via prototype in 2015. - Precision attitude, precision formation – used to make precise images or precise positioning. Research and technology developed at PSSL has collaboration potential with Draper technology development (strategic systems, space, etc). Pete Castelli will reach out to John Conklin to organize future meeting/visit.