Airborne gravity survey of Lincoln Sea and Wandel Sea, north Greenland

In June 1998 National Survey and Cadastre Denmark (KMS) carried out an airb orne gravity survey over the Polar Sea to the north of Greenland. A Twin Ot ter from Greenlandair, equipped with autopilot and additional fuel tanks, w as employed for the survey. A modified marine LaCoste & Romberg gravimeter and geodetic GPS receivers operating in differential mode made up the basic scientific instrumentation used to monitor the gravity field variations. A laser altimeter and a low cost inertial measurement unit consisting of thr ee gyros and three accelerometers were included to sustain the postprocessi ng of the GPS data. The presentation will focus on the integration and vali dation of the system, including comparison with marine and ice gravity meas urements. Gravity results from Lincoln Sea and Wandel Sea between latitude 82 N and 85 N, covering the shelf region and the continental slope and rise , will be presented. (C) 2000 Elsevier Science Ltd. All rights reserved.