Not all of NASA’s rovers are headed to Mars. A new Earth science rover nicknamed GROVER started roaming Greenland’s ice sheet this week. The autonomous, solar-operated robot carries a ground-penetrating radar that will be used to examine how snow is accumulating on the Greenland ice pack. Its findings could help scientists understand how the massive ice sheet gains and loses ice.
The GROVER team, led by Goddard Space Flight Center glaciologist Lora Koenig, arrived in Summit Camp, the highest spot in Greenland, on May 6, 2013. After loading and testing the rover’s radar and fixing a minor communications glitch, tests began on the ice on May 8, in spite of winds that blew up to 23 miles (37 kilometers) per hour and temperatures that were as low as -22 degrees Fahrenheit (-30 degrees Celsius).
The tank-like GROVER prototype stands six feet (two meters) tall, including its solar panels. It weighs about 800 pounds and traverses the ice on two repurposed snowmobile tracks. The robot is powered entirely by solar energy, so it can operate in pristine polar environments without adding to air pollution. The panels are mounted in an inverted V, allowing them to collect energy from the sun and sunlight reflected off the ice sheet.