The ice coverage has been documented since 1973 by means of passive microwave sensors on polar orbiting satellite. (www-das.uwyo.edu)
Our estimate is based on a statistical way using data from satellite microwave sensor. (arcus.org)
A pioneering technique that involves the use of satellite - mounted thermal cameras and microwave sensors allows scientists to identify parts of the ocean that are most at risk of acidification. (techtimes.com)