6 papers
Impact of Spacecraft Orbit Uncertainties and Velocity Mismodeling on the LISA Gravitational-Wave Response
Lorenzo Speri, Olaf Hartwig, Waldemar Martens +5
The Laser Interferometer Space Antenna (LISA) is a space-based gravitational wave observatory that consists of three spacecraft in a near-equilateral triangular formation. The spac…
Searching systematically for coupling of laser and phase-modulation noise in heterodyne interferometry
Kohei Yamamoto, Olaf Hartwig, Lennart Wissel +3
Heterodyne interferometry for precision science often comes with an optical phase modulation, for example, for intersatellite clock noise transfer for gravitational wave (GW) detec…
LISA science ground segment conventions
Quentin Baghi, Stanislas Babak, Leor Barack +22
This document sets out the conventions used for data simulations, waveforms, and analysis pipelines within the Distributed Data Processing Centre (DDPC) of the Laser Interferometer…
Applying TDI to Hardware-Simulated Data
Reid Ferguson, Olaf Hartwig, Guido Mueller
Many years of development have gone into producing instruments that meet the required noise performance of the LISA interferometric detection system. Concurrently, software simulat…
Observable-based reformulation of time-delay interferometry
Kohei Yamamoto, Jan Niklas Reinhardt, Olaf Hartwig
Spaceborne gravitational-wave observatories utilize a postprocessing technique known as time-delay interferometry (TDI) to reduce the otherwise overwhelming laser frequency noise b…
Optimal design of interpolation methods for time-delay interferometry
Martin Staab, Jean-Baptiste Bayle, Olaf Hartwig +4
Time-delay interferometry (TDI) suppresses laser frequency noise by forming linear combinations of time-shifted interferometric measurements. The time-shift operation is implemente…