Gravity Recovery and Interior Laboratory: mission and targets
Data as of 2026-10-04
Dates declared by the archive
- Project start
- September 10, 2011
- Declared end
- December 18, 2012
The start the archive declares is the start of the project, not the launch, and an end it does not declare does not mean the mission is still running.
In Galaxy
Targets you can open in 3D:
A declared target is what the archive files the mission’s data under, not a record of observation.
Description published by the archive
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.
Quoted in English, as the archive publishes it, read on October 4, 2026.
Source
Identifier in the archive, which is its citation: urn:nasa:pds:context:investigation:mission.gravity_recovery_and_interior_laboratory
NASA Planetary Data System, PDS Registry, investigation context products. Dates and targets read on September 29, 2026; how to cite the archive: https://pds.nasa.gov/datastandards/citing/