77 citations · 584 across the 25 of their papers we have counts for
15 papers · 1 filter
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…
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…
Clock synchronization and light-travel-time estimation for space-based gravitational-wave detectors
Jan Niklas Reinhardt, Olaf Hartwig, Gerhard Heinzel
Space-based gravitational-wave detectors, such as LISA, record interferometric measurements on widely separated satellites. Their clocks are not synced actively. Instead, clock syn…
Time-delay interferometry with onboard optical delays
Jan Niklas Reinhardt, Philipp Euringer, Olaf Hartwig +3
Time-delay interferometry (TDI) is a data processing technique for space-based gravitational-wave detectors to create laser-noise-free equal-optical-path-length interferometers vir…
Ranging Sensor Fusion in LISA Data Processing: Treatment of Ambiguities, Noise, and On-Board Delays in LISA Ranging Observables
Jan Niklas Reinhardt, Martin Staab, Kohei Yamamoto +6
Interspacecraft ranging is crucial for the suppression of laser frequency noise via time-delay interferometry (TDI). So far, the effects of on-board delays and ambiguities on the L…
Stochastic gravitational wave background reconstruction for a non-equilateral and unequal-noise LISA constellation
Olaf Hartwig, Marc Lilley, Martina Muratore +1
We explore the impact of choosing different sets of Time-Delay Interferometry (TDI) variables for detecting and reconstructing Stochastic Gravitational Wave Background (SGWB) signa…
The influence of laser relative intensity noise in the Laser Interferometer Space Antenna
Lennart Wissel, Olaf Hartwig, Jean-Baptiste Bayle +4
LISA is an upcoming ESA mission that will detect gravitational waves in space by interferometrically measuring the separation between free-falling test masses at picometer precisio…
Unified model for the LISA measurements and instrument simulations
Jean-Baptiste Bayle, Olaf Hartwig
LISA is a space-based mHz gravitational-wave observatory, with a planned launch in 2034. It is expected to be the first detector of its kind, and will present unique challenges in…
TDI noises transfer functions for LISA
Dam Quang Nam, Yves Lemiere, Antoine Petiteau +4
The LISA mission is the future space-based gravitational wave (GW) observatory of the European Space Agency. It is formed by 3 spacecraft exchanging laser beams in order to form mu…
On the effectiveness of null TDI channels as instrument noise monitors in LISA
Martina Muratore, Olaf Hartwig, Daniele Vetrugno +2
We present a study of the use and limits of the Time-Delay Interferometry null channels for in flight estimation of the Laser Interferometer Space Antenna instrumental noise. The p…
Time delay interferometry without clock synchronisation
Olaf Hartwig, Jean-Baptiste Bayle, Martin Staab +3
Time-delay interferometry (TDI) is a data processing technique for LISA designed to suppress the otherwise overwhelming laser noise by several orders of magnitude. It is widely bel…
Characterization of Time Delay Interferometry combinations for the LISA instrument noise
Olaf Hartwig, Martina Muratore
Time delay interferometry (TDI) is a post-processing technique used in the Laser Interferometer Space Antenna (LISA) to reduce laser frequency noise by building an equal-arm interf…
Time Delay Interferometry combinations as instrument noise monitors for LISA
Martina Muratore, Daniele Vetrugno, Stefano Vitale +1
The LISA mission will likely be a signal dominated detector, such that one challenge is the separation of the different astrophysical sources, and to distinguish between them and t…
Adapting time-delay interferometry for LISA data in frequency
Jean-Baptiste Bayle, Olaf Hartwig, Martin Staab
Time-delay interferometry (TDI) is a post-processing technique used to reduce laser noise in heterodyne interferometric measurements with unequal armlengths, a situation characteri…
Time-Delay Interferometry and Clock-Noise Calibration
Massimo Tinto, Olaf Hartwig
The Laser Interferometer Space Antenna is a joint ESA-NASA space-mission to detect and study mHz cosmic gravitational waves. The trajectories followed by its three spacecraft resul…