A Gamma Portable Radar Interferometer and a Robotic Laser Theodolite sit on top of a large pressure ridge near a U.S. Navy ice camp on the Beaufort Sea, March 4, 2020. The Gamma Portable Radar Interferometer continuously measures precise distances from itself to an array of reflectors deployed around the camp and runway. It is able to detect small movements of the reflectors in relation to each other, and can tell researchers how the ice is expanding and contracting. The radar interferometer in an alternate method to accomplish a similar goal, sending out radar pulses that reflect off of various ice surfaces and records the reflected signal.