First Laser Light for GRACE Follow-On

Artist’s rendering of the twin spacecraft of the Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission. (Credits: NASA/JPL-Caltech)
PASADENA (NASA PR) — The laser ranging interferometer (LRI) instrument has been successfully switched on aboard the recently launched twin U.S./German Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) satellites. The LRI, which is being flown as a technology demonstration, has made its first measurements in parallel with GRACE-FO’s main microwave ranging instrument, and initial comparisons of the data from the two types of instruments show that they agree as expected.

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