The Dynamic Ionosphere CubeSat Experiment (DICE) is a scientific mission consisting of two Miniaturized Satellites DICE-1 and DICE-2 flying in formation.
[1] The satellites are an unusual 1.5U variant of the CubeSat design for microsatellites.
Both satellites were launched from Vandenberg Air Force Base in October 2011 atop a Delta II rocket.
[2] The satellites are intended to map changes in the Earth's Plasmasphere caused by Geomagnetic storms.
The satellites carry four Electric Field Probe sensors on telescopic booms, two DC Langmuir probes for detection of ions and a three-axis magnetometer for measuring magnetic fields.