Multi3 Scat - A Helicopter-Based Scatterometer for Snow-Cover and Sea-Ice Investigations. - Stefan Kern; Manfred Brath; Rene Fontes; Martin Gade; Klaus-Werner Gurgel; Lars Kaleschke; Gunnar Spreen; Steffen Schulz 003; Andreas Winderlich; Detlef Stammer (IEEE Geosci. Remote. Sens. Lett., 2009)