GRAIL

Gravity Recovery and Interior Laboratory (GRAIL) consist of two small spacecrafts (GRAIL A [Ebb] and B [Flow]). It was launched on September 10, 2011. It used high-quality gravitational field mapping of the Moon to determine its interior structure. On August 31, 2012, the two spacecrafts started collecting data at a lower altitude.

Roncoli, R.B., and K.K. Fujii, Mission Design Overview for the Gravity Recovery
                   and Interior Laboratory (GRAIL) Mission, AIAA/AAS Astrodynamics Specialist
                   Conference, Toronto, Ontario, Canada, 2010.
                   http://arc.aiaa.org/doi/pdf/10.2514/6.2010-8383

GRAVITY RECOVERY AND INTERIOR LABORATORY

Text-based and an interactive map-based search interface for finding and downloading desired orbital observations

Orbital Data Explorer

Instrument Data for Gravity Recovery and Interior Laboratory A (GRAIL Ebb)

Observational data from the mission instruments

Laser Transceiver