The research on cold-atom interferometers gathers a large community of about 50 groups
worldwide both in the academic and now in the industrial sectors. The interest in this sub …

Precision time references in space are of major importance to satellite-based fundamental
science, global satellite navigation, earth observation, and satellite formation flying. Here we …

Quantum technology based on cold-atom interferometers is showing great promise for fields
such as inertial sensing and fundamental physics. However, the finite free-fall time of the …

Optical clocks operated on satellites are expected to open up new opportunities in time
transfer, geodesy, fundamental physics, and satellite navigation. Here we demonstrate an …

Recent developments in quantum technology have resulted in a new generation of sensors
for measuring inertial quantities, such as acceleration and rotation. These sensors can …

Long-term observation of Earth's temporal gravity field with enhanced temporal and spatial
resolution is a major objective for future satellite gravity missions. Improving the performance …

We present a diode laser system optimized for laser cooling and atom interferometry with
ultra-cold rubidium atoms aboard sounding rockets as an important milestone toward space …

The emergence of quantum technologies, including cold atom-based accelerometers, offers
an opportunity to improve the performances of space geodesy missions. In this context …

Abstract Atomic Clock Ensemble in Space (ACES) is a mission designed to test Einstein's
theory of General Relativity from the International Space Station (ISS). A primary frequency …

We present the design of a compact absolute optical frequency reference for space
applications based on hyperfine transitions in molecular iodine with a targeted fractional …