WindSat is a satellite-based polarimetric microwave radiometer developed is designed to demonstrate the capability of measuring the ocean surface wind vector from space. WindSat also measures sea surface temperature, total precipitable water, integrated cloud liquid water, and rain rate over the ocean. See the picture for a snapshot of windsat winds near Greenland yesterday. For more views, click on an area on http://www.nrl.navy.mil/WindSat/data/wind/AscendingWindMap.php