Lora Koenig, of NASA's Goddard Space Flight Center, drives a snowmobile that pulled a radar sled holding two radars across a total of 400 kilometers of Antarctic snow. The radars, developed at University of Kansas' Center for Remote Sensing of Ice Sheets, detect layers in the snow related to accumulation over a larger area than possible from ice cores and snow pits. An international team of researchers in West Antarctica, led by Koenig, collected snow accumulation information during the 2010-2011 Antarctic field season. A key component of understanding the continent's mass balance, the data were collected from snow pits, ice cores and radar, all of which will be tied back to the large-scale observations from satellites. The ground-based work is expected to boost the utility of the satellite record. For more about the project, see the article at The Antarctic Sun website: http://antarcticsun.usap.gov/science/contenthandler.cfm?id=2648.