The MOCAST+ Study on a Quantum Gradiometry Satellite Mission with Atomic Clocks

Abstract In the past twenty years, satellite gravimetry missions have successfully provided data for determination of Earth static gravity field (GOCE) and its temporal variations (GRACE GRACE-FO). particular, possibility to study evolution in time masses allows us monitor global parameters underlying climate changes, water resources, flooding, melting ice corresponding sea level rise, all which are paramount importance, providing basic on, e.g. geodynamics, earthquakes, hydrology or sheets changes. Recently, a large interest has developed novel technologies quantum sensing, promise higher sensitivity, drift-free measurements, absolute accuracy both terrestrial surveys space missions, giving direct access more precise long-term measurements. Looking at frame beyond present decade, MOCAST+ (MOnitoring mass by Cold Atom Sensors Time measures) mission based on an “enhanced” payload is proposed, with cold atom interferometers acting as gradiometers, atomic clocks optical frequency observations differences gravitational potential. The main outcomes definition be expected from this needed detect phenomena identified Scientific Challenges ESA Living Planet Program, particular Cryosphere, Ocean Solid Earth. paper, proposed payload, profile preliminary platform design presented, end-to-end simulation results assessment impact geophysical applications.