This book is a collection of papers that presents results of the analysis by European scientists of data from the Seasat mission. Sea‐sat, launched in 1978, was the first satellite dedicated to microwave remote sensing of the oceans. The spacecraft carried a suite of four microwave sensors, includng a radar altimeter, a synthetic aperture radar, a windfield scatterometer, and a scanning multi‐channel microwave radiometer. These microwave sensors were supported by a visible and infrared radiometer.