[1] The Niton XL3T is an x-ray fluorescence (XRF) spectrometer, used for the non-destructive chemical analysis of rocks, minerals, and sediments.
One of them was in 2010 in Haughton Crater, Canada[1] (one of the most lunar-like surfaces on Earth), and the other run was where the K10 was created at the Ames Research Center.
[1] The 2013 experiment was a 100 minute real-time teleoperation of a K10 rover from the ISS,[3] commandeered by astronaut Luca Parmitano.
[4] Considered a breakthrough in surface telerobotics,[5] this experiment showed the true potential of executing a low-risk terrestrial survey mission from deep-space or in orbit.
In addition to completing this, the test presents a potential future mission involving astronauts aboard NASA's Orion spacecraft traveling to the L2 Earth-Moon Lagrange point 65,000 km above the far side of the Moon.
[3] From such a location, astronauts could operate a robot remotely to perform surface science work, such as deploying a radio telescope.