SATELLITE CALIBRATION AND VALIDATION EXPERIMENTS OVER ARCTIC SEA ICE IN THE VICINITY OF SVALBARD

摘要

In late summer 2010, in situ observations on Arctic searnice were performed at the end of the melting seasonrnnorth of Svalbard, and in the Fram Strait. Highrnresolution Radarsat-2 SAR images were obtained.rnSimultaneously, data about sea ice and snow thickness,rnice topography, and melt ponds was collected. Arnhelicopter performed ice thickness surveys using anrnelectromagnetic (EM) device, accompanied withrnautomatic photography and laser altimetry. The EMrnmethod is also used for the calibration and validation ofrndata from the new CryoSat-2 radar altimetry satellite.rnData on snow and ice properties have been collectedrnover several years for satellite altimetry calibration.rnThese are necessary for estimating the sea ice thicknessrnfrom measured freeboard. Preliminary results indicaternthe improved possibilities for ice type classificationrnfrom SAR satellite imagery. Data collected for CryoSat-rn2 calibration and validation will contribute to improverndata quality of CryoSat-2 products.