Browsing Nansen Environmental and Remote Sensing Center (NERSC) by Author "Johannessen, Johnny A."
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Coastal wind field retrievals from ERS synthetic aperture radar images
Korsbakken, E.; Johannessen, Johnny A.; Johannessen, Ola M. (Journal article; Peer reviewed, 1998-04-15)A unique series of European Remote Sensing Satellite (ERS) 1 and 2 C band synthetic aperture radar (SAR) images was obtained off the southern coast of Norway during the Coast Watch’95 experiment in September 1995. In this ... -
Earth science – oceanography
Johannessen, Johnny A.; Sandven, Stein; Durand, Dominique (Chapter, 2002)Satellite oceanography began with the Gemini XII flight in November 1966. From a Hasselblad camera mounted in the pilot’s window large internal waves in the eastern tropical Atlantic were photographed via sunglitter for ... -
An ERS 1 synthetic aperture radar image of atmospheric lee waves
Vachon, P. W.; Johannessen, Ola M.; Johannessen, Johnny A. (Journal article; Peer reviewed, 1994-11-15)An ERS 1 synthetic aperture radar (SAR) image of the island Hopen shows a distinct 7.6-km wavelength wave phenomenon near the island. This wave phenomenon is interpreted as the surface imprint on open water of atmospheric ... -
Greenland Sea Odden sea ice feature: Intra-annual and interannual variability
Shuchman, Robert A.; Josberger, Edward G.; Russel, Catherine A.; Fischer, Kenneth W.; Johannessen, Ola M.; Johannessen, Johnny A.; Gloersen, Per (Journal article; Peer reviewed, 1998-06-15)The “Odden” is a large sea ice feature that forms in the east Greenland Sea that may protrude eastward to 5 °E from the main sea ice pack (at about 8 °W) between 73° and 77 °N. It generally forms at the beginning of the ... -
Measuring Ocean Salinity with ESA’s SMOS Mission – Advancing the Science
Berger, M.; Camps, A.; Font, Jordi; Kerr, Yann; Miller, J.; Johannessen, Johnny A.; Boutin, J.; Drinkwater, M. R.; Skou, N.; Floury, N.; Rast, M.; Rebhan, Helge; Attema, E. (Journal article, 2002-08) -
Microwave Study programs of Air-Ice-Ocean interactive processes in the Seasonal Ice Zone of the Greenland and Barents Seas
Johannessen, Ola M.; Campbell, William J.; Shuchman, Robert A.; Sandven, Stein; Gloersen, Per; Johannessen, Johnny A.; Josberger, Edward G.; Haugan, Peter Mosby (Geophysical Monograph 68, Chapter, 1992)Describes the use of satellite ice data into a working technology for the satellite data sets of the recent past and immediate future. Chapters cover basic observations, modeling, geophysical interpretation, and using data ... -
Observing the Ocean from Space: Emerging Capabilities in Europe
Johannessen, Johnny A.; Le Provost, Christian; Drange, Helge; Srokosz, Meric; Woodworth, Philip; Sclüssel, Peter; Le Grand, Pascal; Kerr, Yann; Wingham, Duncan; Rebhan, Helge (Chapter, 2001-12)During the first decade of the 21st century Earth observation from satellites will be faced with two major demands: provision of continuity missions and launch of new exploratory missions. This paper addresses European ... -
Toward an optimal inversion method for synthetic aperture radar wind retrieval
Portabella, M.; Stoffelen, A.; Johannessen, Johnny A. (Journal article; Peer reviewed, 2002-08-01)In recent years, particular efforts have been made to derive wind fields over the oceans from synthetic aperture radar (SAR) images. In contrast with the scatterometer, the SAR has a higher spatial resolution and therefore ...