• Strengthen the US role in planned ESA ISS atom interferometer collaboration by providing a US sub-system contribution as part of the barter agreement.
  
  
• Partner with ESA on the space atom interferometer project to validate high resolution drag-free test mass technology for precision inertial force measurements and perform tests of fundamental physics on the ISS.

• Strengthen the US role in planned ESA ISS optical clock collaboration by providing a US sub-system contribution as part of the barter agreement.
  
  
• Partner with ESA to develop the most accurate clock in space, for fundamental physics, navigation, laser ranging, communication, and geodesy.

Atomic Clock Ensemble in Space (ACES) is an ESA mission in fundamental physics based on the performances of a new generation of atomic clocks operated in the microgravity environment of the International Space Station (ISS).

The Station orbits at a mean elevation of 400 km with a 90 minute rotation period and an inclination angle of 51.6º. Transported on orbit by the Japanese transfer vehicle HTV, ACES will be installed at the external payload facility of the European Columbus laboratory using the Space Station robotic arm.

DECLIC is a multi-user facility to investigate low and high temperature critical fluids behaviour, chemical reactivity in supercritical water, directional solidification of transparent alloys, and more generally transparent media under micro-gravity environment on board the International Space Station (ISS)

DEvice for the study of Critical LIquids and Crystallization (DECLIC) is a multi-user facility used to study transparent media and their phase transitions in microgravity onboard the International Space Station. The Alice Like Insert (ALI) portion of DECLIC studies the dynamics of near-ambient temperature critical fluids of sulfur hexafluoride, a colorless, odorless, non-toxic and non-flammable gas known and carbon dioxide