BAGHI , Quentin

The MICROSCOPE space mission, launched on April 25, 2016, aims to test the weak equivalence principle (WEP) with a 10^−15 precision. Reaching this performance requires an accurate and robust data analysis method, especially since the possible WEP violation signal will be dominated by a strongly colored noise. An important complication is...

Launched in April 2016, the MICROSCOPE satellite ended its operations in October 2018 with the deployment of its deorbitation wings. MICROSCOPE aims at testing the equivalence principle (EP), the funding hypothesis of general relativity established by Einstein in 1915. In December 2017, first results based on only 7% of the total data improved...

The aim of the MICROSCOPE space mission is to test the weak equivalence principle (WEP) with a precision of 10−15, 100 times better than on-ground experiments. The WEP violation signal that we look for in flight has a particular frequency signature and must be extracted from the measurement of accelerations dominated by a colored noise...

The analysis of physical measurements often copes with highly correlated noises and interruptions caused by outliers, saturation events, or transmission losses. We assess the impact of missing data on the performance of linear regression analysis involving the fit of modeled or measured time series. We show that data gaps can significantly...

The LISA Pathfinder (LPF) mission succeeded outstandingly in demonstrating key technological aspects of future space-borne gravitational-wave detectors, such as the Laser Interferometer Space Antenna (LISA). Specifically, LPF demonstrated with unprecedented sensitivity the measurement of the relative acceleration of two free-falling cubic test...

Massive black hole binaries are expected to provide the strongest gravitational wave signals for the Laser Interferometer Space Antenna (LISA), a space mission targeting ∼mHz frequencies. As a result of the technological challenges inherent in the mission's design, implementation, and long duration (4 yr nominal), the LISA data stream is...

By listening to gravity in the low-frequency band, between 0.1 mHz and 1 Hz, the future space-based gravitational-wave observatory LISA will be able to detect tens of thousands of astrophysical sources from cosmic dawn to the present. The detection and characterization of all resolvable sources is a challenge in itself, but LISA data analysis...

MICROSCOPE's space test of the weak equivalence principle (WEP) is based on the minute measurement of the difference of accelerations experienced by two test masses as they orbit the Earth. A detection of a violation of the WEP would appear at a well-known frequency f$_{EP}$ depending on the satellite's orbital and spinning frequencies....

After performing highly sensitive acceleration measurements during two years of drag-free flight around the Earth, MICROSCOPE provided the best constraint on the weak equivalence principle (WEP) to date. Beside being a technological challenge, this experiment required a specialised data analysis pipeline to look for a potential small signal...

The MICROSCOPE mission aimed to test the weak equivalence principle (WEP) to a precision of 10$^{−15}$. The WEP states that two bodies fall at the same rate on a gravitational field independently of their mass or composition. In MICROSCOPE, two masses of different compositions (titanium and platinum alloys) are placed on a quasi-circular...

The Weak Equivalence Principle (WEP), stating that two bodies of different compositions and/or mass fall at the same rate in a gravitational field (universality of free fall), is at the very foundation of General Relativity. The MICROSCOPE mission aims to test its validity to a precision of $10^{-15}$, two orders of magnitude better than...