A variety of man-made objects have been sent into outer space for decades, and as a very large and distinguished group, they have sent back important data. NASA has been at the forefront of these efforts here in the United States, and the Landsat Program has certainly been quite successful since its inception in the early 1970s. This website provides a wealth of information on the Landsat Program,...

The Dartmouth Flood Observatory performs research and collects data on the space-based measurement of surface water "for research, educational, and humanitarian applications." On their homepage visitors are presented with a global map of current flooding, complemented by links to data sets related to historic flood levels from 1985 to the present. Visitors can also click on the "Active Archive of...

In keeping with the trend towards global-scale monitoring, NASA has launched this Website to highlight NASA research on "regional and global changes on the planet." The site is comprised of five main sections: Modeling Earth's Land Biosphere, Reckoning With Winds (tropical cyclones), Climate Modeling, El Nino, and Benjamin Franklin (earth science). Each section contains an illustrated summary of...

Every few years, new satellite images of the earth's surface are acquired from remote sensors aboard a space craft. Because the technology associated with satellite imagery improves so rapidly, these new images generate a wave of excitement throughout the scientific community, representing an opportunity to view the earth's surface at a level of detail (resolution) and accuracy never achieved...