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PSSL — Precision Space Systems Laboratory
Mechanical & Aerospace EngineeringUniversity of Florida

GRATTIS

The GRATTIS mission tests state-of-the-art gravitational reference sensors in space to monitor nanometer-scale gravitational changes for future climate change observatories.

The Gravitational Reference Advanced Technology Test In Space (GRATTIS) is a University of Florida mission that operates a next-generation gravitational reference sensor in orbit. The sensor tracks a free-floating test mass with nanometer precision — the core technology for future satellite constellations that will monitor Earth’s water, ice, and climate through the planet’s changing gravity field, and for gravitational-wave observatories such as LISA.

Earth’s Gravity Field. GRATTIS will test the sensor technology behind future Earth-gravity monitoring constellations.

The mission takes PSSL-developed flight hardware from the laboratory in Gainesville to orbit aboard a commercial spacecraft, demonstrating in space what has so far only been possible on the ground.

Visit the GRATTIS mission website →

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