SMOS calibration and validation activities with airborne interferometric radiometer HUT-2D during spring 2010 - Juha Kainulainen; Kimmo Rautiainen; Pauli Sievinen; Jaakko Seppänen; Erkka Rouhe; Martti Hallikainen; Johanna T. Dall'Amico; Florian Schlenz; Alexander Loew; Alexander Bircher; Carsten Montzka (IEEE International Geoscience & Remote Sensing Symposium, IGARSS 2010, July 25-30, 2010, Honolulu, Hawaii, USA, Proceedings, 2010)