Kenneth C. Jezek

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This paper presents a comprehensive approach to effectively and accurately extract coastlines from satellite imagery. It consists of a sequence of image processing algorithms, in which the key component is image segmentation based on a locally adaptive thresholding technique. Several technical innovations have been made to improve the accuracy and(More)
The spatial and temporal distribution of new and young sea-ice types are of particular interest because of the influence this can etiert on the heat and mass balance of the Polar sea ice packs. The objective of the present work is to characterize the temporal evolution of the electromagnetic signatures of sea ice from initial formation through the(More)
We are developing a multifrequency multistatic synthetic aperture radar (SAR) for determining polar ice sheet basal conditions. To obtain data for designing and optimizing radar performance, we performed field measurements with a network-analyzer-based system during the 2003 field season at the North Greenland Ice Core Project camp (75.1 N and 42.3 W). From(More)
Airborne radar images of part of the Greenland ice sheet reveal icy terrain whose radar properties are unique among radar-studied terrestrial surfaces but resemble those of Jupiter's icy Galilean satellites. The 5.6- and 24-centimeter-wavelength echoes from the Greenland percolation zone, like the 3.5- and 13-centimeter-wavelength echoes from the icy(More)
TheRADARSAT-1AntarcticMapping Project (RAMP) is a collaboration betweenNASAandthe CanadianSpaceAgency tomapAntarcticausing synthetic aperture radar (SAR).The first Antarctic MappingMission (AMM-1) was successfully completed in October 1997. Data from the acquisition phase of the 1997 campaign have been used to achieve the primary goalof producing the first(More)
A complete, high-resolution coastline of Antarctica, extracted from an orthorectified mosaic of Radarsat-1 synthetic aperture radar (SAR) images through a sequence of automated image processing algorithms, is presented. A locally adaptive thresholding method is used to segment the orthorectified SAR images, while image-object formation and labeling, and(More)