The first four years of the Landsat 7 mission: a review

The Landsat 7 mission is making major advances in our understanding of the Earth´s land and coastal oceans and the role of human activities as a force for global change. It has achieved unprecedented successes in satellite and sensor performance, mission management and operations, data acquisition and distribution, and science. In summary, the Landsat 7 satellite mission is realizing a long-held dream for the entire Landsat program: to provide continuing seasonal, global, high-resolution data for a myriad of important science and applications uses.