The SeaWinds instrument, which flew on NASA's Quick Scatterometer (QuikSCAT) satellite and NASA/JAXA's ADEOS-II, was a A Ku-band (13.4 GHz) scatterometer featuring a circular dish antenna, which provides pencil-beam radar backscatter measurements. SeaWinds provided all-weather ocean surface wind vector measurements over Earth's ice-free global oceans. The instrument was designed to improve weather predictions and models, in part to help plan for and anticipate extreme weather conditions such as floods, hurricanes and tsunamis.