In addition to the archive data itself, we have an on-line classroom lesson plan describing some of the uses of these images. This provides excellent help in interpreting the images - what the different colors mean and how to tell which areas represent sea surface temperature and which represent cloud cover.
Each of the 1024 by 1024 pixel images in the archive covers the area from latitude 60.575N longitude 96.222W to latitude 9.399N longitude 33.768W using a cylindrical equirectangular map projection with a resolution of 5km/pixel. These images clearly show the Gulf Stream as it heads up the Eastern North American coast line and out into the Atlantic Ocean. Other online sources of AVHRR data exist which cover different regions and/or the entire globe.
In order to build the entire archive data was processed using several different schemes depending on the satellite used to gather the data.
The archive contains in excess of 20,000 images from April 1979 to the present. New images are added to the archive every day at 10:30 GMT. During the first two years of the archive holdings, coverage is quite spotty, but subsequent years generally have several images for each day.
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