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Danish expedition ship tracked by Envisat satellite   The Danish ship Vædderen in Copenhagen before leaving on its science expedition trip, Galathea 3.  Envisat's Advanced Along Track Scanning Radiometer (AATSR) continuously monitors sea surface temperature to an accuracy of a few tenths of a degree. This is a false-colour representation of AATSR results over the Atlantic, with blue corresponding to coldest waters and red the warmest.  Appearing in this Envisat radar image like shining jewels, ships pass from the man-made Lake Gatun through the Panama Canal across Central America.
The colour in this image is due to it being a multitemporal composite, made up of three Advanced Synthetic Aperture Radar (ASAR) images acquired on different dates, with separate colours assigned to each acquisition to highlight differences between them: Red for 16 March, Green for 12 Jan and blue for 14 October 2004.
The view was acquired in ASAR Image Mode Precision, with pixel sampling of 12.5 metres.  This image of the historic port of Copenhagen was acquired on 14 April 2004 by the Compact High Resolution Imaging Spectrometer (CHRIS) onboard Proba satellite. Release date: 22 February 2008 |