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This view of the Amery Ice Shelf is a mosaic of radar images from the 2000 Antarctic Mapping Mission. The blue line represents the coastline seen during the 1997 Antarctic Mapping Mission. The yellow coastline dates from the mid-1970s. Over the past 25 years, the Amery has been in a period of general advancement, moving seaward about 25 kilometers (15.5 miles). From 1997-2000, the ice shelf edge extended seaward about 5 kilometers (3 miles). Note that the coastal areas adjacent to the Amery Ice Shelf on both sides show little change. The two Antarctic mapping missions provide highly accurate coastal baselines needed for future comparisons. This image is centered at approximately 69 degrees south and 72.5 degrees east, covering an area about 115 by 165 kilometers (70 by 100 miles). The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles). The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR facility # # # # #
Description
This view of the Amery Ice Shelf is a mosaic of radar images from the 2000 Antarctic Mapping Mission. The blue line represents the coastline seen during the 1997 Antarctic Mapping Mission. The yellow coastline dates from the mid-1970s. Over the past 25 years, the Amery has been in a period of general advancement, moving seaward about 25 kilometers (15.5 miles). From 1997-2000, the ice shelf edge extended seaward about 5 kilometers (3 miles). Note that the coastal areas adjacent to the Amery Ice Shelf on both sides show little change. The two Antarctic mapping missions provide highly accurate coastal baselines needed for future comparisons. This image is centered at approximately 69 degrees south and 72.5 degrees east, covering an area about 115 by 165 kilometers (70 by 100 miles). The Antarctic Mapping Mission is a joint project between NASA and the Canadian Space Agency. The project is led by Ohio State University in Columbus in partnership with the Alaska Synthetic Aperture Radar (SAR) Facility at the University of Alaska Fairbanks, NASA's Jet Propulsion Laboratory, Pasadena, Calif., and the Vexcel Corporation, Boulder, Colo. The Canadian Space Agency's RADARSAT-1 satellite carries a synthetic aperture radar, an imaging radar sensor that operates at C-band (5.3 GHz frequency) with horizontal transmit-horizontal receive polarization from an orbital altitude of about 800 kilometers (500 miles). The 1997 Antarctic Mapping Mission took place between Sept. 19 and Oct. 14 and mapped the entire Antarctic continent. The 2000 Antarctic Mapping Mission lasted from Sept. 3 to Nov. 4 and obtained complete coverage of Antarctica north of 82 degrees south latitude. Photo Credit: Canadian Space Agency/NASA/Ohio State University, Jet Propulsion Laboratory, Alaska SAR facility # # # # #
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