Landsat

a. Landsat Project (http://landsat7.usgs.gov/);
b. Landsat.org (http://www.landsat.org/);
c. Landsat 7 (http://ls7pm3.gsfc.nasa.gov/);

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Terra/Aqua MODIS

a. Modis Web (http://modis.gsfc.nasa.gov/);
b. Terra - the EOS Flagship (http://terra.nasa.gov/);
c. Aqua Project Science (http://aqua.nasa.gov/);
d. Antenna Network (http://telegis.unica.it/progetto/antenna);
e. Geoinformatics Centre (http://www.acrors.ait.ac.th/modis/index.html);

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Terra ASTER

a. Aster (http://asterweb.jpl.nasa.gov/);
b. Aster Spectral Library (http://speclib.jpl.nasa.gov/);
c. Aster GDS (http://www.gds.aster.ersdac.or.jp/);
d. Aster Science Project (http://www.science.aster.ersdac.or.jp/en/);

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Quickbird

a. Quickbird (http://www.ballaerospace.com/quickbird.html);

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NOAA satellites

a. NOAA Home Page (http://www.noaa.gov/satellites.html);