The LISA integrated model

Merkowitz, Stephen M.

doi:10.1088/0264-9381/20/10/328

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…Work is now in progress to build prototype and end-to-end model to bring most of the issues into surface in order to avoid possible mistakes in the full development. The end-to-end model will utilize realistic simulations based on the feasible technologies to study the impact of different subsystems of the detector on the final high-precision measurements [40]. In principle, the elements of an end-to-end model will include the orbit of the spacecrafts [41], interplanetary and relativistic effects [42] on the optical links, various noises in a comprehensive noise budget, and the implementation of time delay interferometry (TDI) to reduce the laser phase noise and optical bench noise [43].…”

Section: Introductionmentioning

confidence: 99%

Fundamentals of the orbit and response for TianQin

Wang

et al. 2018

Class. Quantum Grav.

115

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TianQin is a space-based laser interferometric gravitational wave detector aimed at detecting gravitational waves at low frequencies (0.1 mHz -1 Hz). It is formed by three identical dragfree spacecrafts in an equilateral triangular constellation orbiting around the Earth. The distance between each pair of spacecrafts is approximately 1.7×10 5 km. The spacecrafts are interconnected by infrared laser beams forming up to three Michelson-type interferometers. The detailed mission design and the study of science objectives for the TianQin project depend crucially on the orbit and the response of the detector. In this paper, we provide the analytic expressions for the coordinates of the orbit for each spacecraft in the heliocentric-ecliptic coordinate system to the leading orders. This enables a sufficiently accurate study of science objectives and data analysis, and serves as a first step to further orbit design and optimization. We calculate the response of a single Michelson detector to plane gravitational waves in arbitrary waveform which is valid in the full range of the sensitive frequencies. It is then used to generate the more realistic sensitivity curve of TianQin. We apply this model on a reference white-dwarf binary as a proof of principle.

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Section: Introductionmentioning

confidence: 99%

Fundamentals of the orbit and response for TianQin

Wang

et al. 2018

Class. Quantum Grav.

115

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“…The LISA Simulator was conceived to interface source simulations to data analysis, while Synthetic LISA was targeted to explore the interaction between LISA science and technology, and it must therefore operate at a lower level of abstraction: in particular, Synthetic LISA performs an explicit time-domain simulation of interferometry, including the cancellation of laser phase noise. On the other hand, it operates at a higher level of abstraction than integrated-modeling simulations [9]: it does not need to model spacecraft subsystems, but rather it assumes nominal specifications of their performance.…”

Section: Introductionmentioning

confidence: 99%

Synthetic LISA: Simulating time delay interferometry in a model LISA

2005

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We report on three numerical experiments on the implementation of Time-Delay Interferometry (TDI) for LISA, performed with Synthetic LISA, a C++/Python package that we developed to simulate the LISA science process at the level of scientific and technical requirements. Specifically, we study the laser-noise residuals left by first-generation TDI when the LISA armlengths have a realistic time dependence; we characterize the armlength-measurements accuracies that are needed to have effective laser-noise cancellation in both first-and second-generation TDI; and we estimate the quantization and telemetry bitdepth needed for the phase measurements. Synthetic LISA generates synthetic time series of the LISA fundamental noises, as filtered through all the TDI observables; it also provides a streamlined module to compute the TDI responses to gravitational waves according to a full model of TDI, including the motion of the LISA array and the temporal and directional dependence of the armlengths. We discuss the theoretical model that underlies the simulation, its implementation, and its use in future investigations on system characterization and data-analysis prototyping for LISA.

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“…Forward modeling plays a key role in the design of any new scientific instrument, and is especially important when the instrument is the first of its kind. Work is now underway to produce an end-to-end model of the LISA observatory [6]. Key ingredients include accurate modeling of the spacecraft orbits and photon trajectories (this includes the effects of gravitational waves), realistic simulations of the time delay interferometry used to cancel laser phase noise, and experimental characterization of the various noise contributions.…”

Section: Introductionmentioning

confidence: 99%

Forward modeling of space-borne gravitational wave detectors

2004

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Planning is underway for several space-borne gravitational wave observatories to be built in the next 10 to 20 years. Realistic and efficient forward modeling will play a key role in the design and operation of these observatories. Space-borne interferometric gravitational wave detectors operate very differently from their ground-based counterparts. Complex orbital motion, virtual interferometry, and finite size effects complicate the description of space-based systems, while nonlinear control systems complicate the description of groundbased systems. Here we explore the forward modeling of space-based gravitational wave detectors and introduce an adiabatic approximation to the detector response that significantly extends the range of the standard low frequency approximation. The adiabatic approximation will aid in the development of data analysis techniques, and improve the modeling of astrophysical parameter extraction.

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The LISA integrated model

Cited by 7 publications

References 2 publications

Fundamentals of the orbit and response for TianQin

Fundamentals of the orbit and response for TianQin

Synthetic LISA: Simulating time delay interferometry in a model LISA

Forward modeling of space-borne gravitational wave detectors

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