Airborne gravity survey of the North Greenland continental shelf

An airborne gravity survey has been carried out 1998–99 to cover the ice-covered parts of the seas around northern and north-eastern Greenland. The aerogravity survey has been done by a Danish-Norwegian aerogravity system setup, based on a Lacoste and Romberg “S” gravimeter. A Twin-Otter aircraft has been used, capable of low and slow flights, yielding airborne gravity measurements of relatively high accuracy and resolution. Crossover adjustments and comparisons to independent marine gravity data indicate accuracies of 2 mGal r.m.s., at a resolution of 6–7 km. This kind of accuracy level corresponds to relative geoid errors around 10 cm across the coastal region.