A5085526556- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Planetary Science and Exploration
- Spacecraft Design and Technology
- Astro and Planetary Science
- Pulsars and Gravitational Waves Research
- Spacecraft and Cryogenic Technologies
- Geomagnetism and Paleomagnetism Studies
- Geophysics and Sensor Technology
- Cosmology and Gravitation Theories
- Cold Atom Physics and Bose-Einstein Condensates
- Spacecraft Dynamics and Control
- Scientific Measurement and Uncertainty Evaluation
- Astronomy and Astrophysical Research
- Relativity and Gravitational Theory
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Aerospace Engineering and Energy Systems
- Inertial Sensor and Navigation
- Space Satellite Systems and Control
- Stellar, planetary, and galactic studies
- Radioactive Decay and Measurement Techniques
- Biblical Studies and Interpretation
- Space Exploration and Technology
- Noncommutative and Quantum Gravity Theories
Alenia Aermacchi
2013-2025
Thales (Italy)
2013-2025
Space (Italy)
2015-2023
European Space Research and Technology Centre
2014-2018
Thales (Portugal)
2018
Leonardo (United States)
2004-2018
Thales (Australia)
2018
Institut d'Astrophysique de Paris
2014
Ansaldo (Italy)
1995
The current standard model of cosmology successfully describes a variety measurements, but the nature its main ingredients, dark matter and energy, remains unknown. is medium-class mission in Cosmic Vision 2015--2025 programme European Space Agency (ESA) that will provide high-resolution optical imaging, as well near-infrared imaging spectroscopy, over about 14\,000\,deg$^2$ extragalactic sky. In addition to accurate weak lensing clustering measurements probe structure formation half age...
The small satellite 'Galileo Galilei' (GG) will test the universality of free fall and hence weak equivalence principle which is founding pillar general relativity to 1 part in 1017. It use proof masses whose atoms differ substantially from one another their mass energy content, so as maximize chance violation. GG improve by four orders magnitude current best 'Eöt-Wash' tests based on slowly rotating torsion balances, have been able reach thermal noise level. In GG, expected violation signal...
Euclid is a space-based optical/near-infrared survey mission of the European Space Agency (ESA) to investigate nature dark energy, matter and gravity by observing geometry Universe on formation structures over cosmological timescales. will use two probes signature energy: Weak gravitational Lensing, which requires measurement shape photometric redshifts distant galaxies, Galaxy Clustering, based 3-dimensional distribution galaxies through their spectroscopic redshifts. The scheduled for...
Through the contributions of Galileo, Newton, and Einstein, we recall universality free fall (UFF), weak equivalence principle (WEP), strong (SEP), in order to stress that general relativity requires all test masses be equally accelerated a gravitational field; is, it UFF WEP hold. The possibility testing this crucial fact with null, highly sensitive experiments makes these most powerful tests theory. Following Schiff, derive redshift from special show that, as long clocks are affected by...
Abstract Earthquakes have been studied by means of seismometers recording the elastic waves travelling through interior our planet. Global Navigation Satellite System and Synthetic Aperture Radar surveys, measuring surface displacements, provided additional information on earthquakes, as well those solid Earth processes responsible for them, such subduction, collision extension inter-seismic strain accumulation. This instrumentation is deployed over land thus misses seas, often surrounding...
In June 2012, Euclid, ESA's Cosmology mission was approved for implementation. Afterwards the industrial contracts were signed payload module and spacecraft prime, requirements consolidated. We present status of in light design solutions adopted by contractors. The performances its operation, telescope assembly, scientific instruments as well data-processing have been carefully budgeted to meet demanding requirements. give an overview system where necessary key items interfaces between subsystems.
Tests of the Weak Equivalence Principle can reveal a new, composition dependent, force nature or disprove many models new physics. For first time such test is successfully carried out in space by MICROSCOPE satellite. Early results show no violation sourced Earth for Pt and Ti masses with random errors (after 8.26d integration time) about 1 part 1e14, similar systematic errors.It improves 10 times over best ground tests rotating torsion balances despite 70 less sensitivity to differential...
Mechanical oscillators can be sensitive to very small forces. Low frequency effects are up-converted higher by rotating the oscillator. We show that for 2-dimensional at much than signal thermal noise force due internal losses and competing with it is abated as square root of rotation frequency. also natural one possible if oscillator has 2 degrees freedom, describe how this property applies torsion balances. In addition, in 2D above resonance without being attenuated 1D case, thus relaxing...
Following the success of GRACE and GOCE, scientific communities space agencies have started to focus their attention towards preparation a future gravity mission, for time being called Next Generation Gravity Mission (NGGM).Such mission requires quantum leap not only in ranging sensor, such as that provided by laser interferometry place microwave sensing, but also parallel improvement performance satellite subsystems dedicated attitude disturbance control, where GOCE experience will be...
Test masses coupled by weak mechanical suspensions are sensitive to differential forces such as the force due a possible violation of equivalence principle (EP). If in addition they put rapid rotation, signal is modulated at high frequency, which beneficial for noise reduction. Galileo Galilei (GG) proposed space experiment testing 1 part based on these concepts. A recent paper Jafry and Weinberger (1998 Class. Quantum Grav. 15 481-500) claims that GG can only reach . We show analysis this...
While the energy density of Cosmic X-ray Background (CXB) provides a statistical estimate super massive black hole (SMBH) growth and mass in Universe, lack, so far, focusing instrument 20-60 keV (where CXB peaks), frustrates our effort to obtain comprehensive picture SMBH evolutionary properties. HEXIT-SAT (High Energy Imaging Telescope SATellite) is mission concept capable exploring hard sky with focusing/imaging instrumentation, an unbiased census accreting up redshifts where galaxy...
The integration time required by space experiments to perform high accuracy tests of the universality free fall and weak equivalence principle is a crucial issue. It inversely proportional square acceleration be measured, which extremely small; duration mission severe limitation in lack repeatability. An exceedingly long can therefore rule out target. We have evaluated due thermal noise from gas damping, Johnson eddy currents---which are independent signal frequency---and internal known...
The objective of ESA's Next Generation Gravity Mission (NGGM) is long-term monitoring the temporal variations Earth's gravity field at high resolution in time (down to 3 days) and space (100 km). Such carry information about mass transport induced by water cycle related exchange among atmosphere, oceans, cryosphere land, will complete our picture Global Change with otherwise unavailable data. observable variation distance between two satellites measured a laser interferometer; accelerometers...
The extreme resolution provided by laser interferometers can be exploited for improving the measurement of Earth's gravity field from space. Here we describe concept a Next Generation Gravity Mission based on this optical metrology and some ongoing developments key technologies, carried out in preparation an operational mission.