PROMICE perimeter airborne laser and radar altimetry survey

Airborne surveys were carried out in 2007, 2011 and 2015 along the PROMICE perimeter, which approximately circumscribing the 1700 m elevation contour of the Greenland Ice Sheet. Ice-sheet surface elevation was measured by laser altimetry and bedrock elevation was measured by radar sounding. These airborne data files are level-two data products, meaning that along- and across-track averaging has been applied to the primary sensor data.