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RADIO SCIENCE,
VOL. 38,
1067,
8 PP., 2003
doi:10.1029/2002RS002707
Noise maps in aperture synthesis radiometric images due to cross-correlation of visibility noise
Laboratory of Space Technology, Helsinki University of Technology, Espoo, Finland
Department of Signal Theory and Communications, Universitat Politécnica de Catalunya, Barcelona, Spain
This study deals with the calculation of the distribution of radiometric errors (“noise maps”) in the images formed by a two-dimensional aperture synthesis radiometer, specifically the MIRAS and the HUT-2D instruments. MIRAS is a spaceborne Y-shaped interferometric radiometer that will be boarded in the European Space Agency's SMOS Earth Explorer Mission. The HUT-2D is a U-shaped airborne interferometric radiometer under development by the Helsinki University of Technology. The study focuses on the known fact that the cross-correlation of the visibility noise does depend on the shape of the sensor. We investigate this dependence for the Y and the U configurations, taking into account also the results of previous studies on redundancy and tapering.
Received 24 April 2002; accepted 27 March 2003; published 23 July 2003.
Citation: (2003), Noise maps in aperture synthesis radiometric images due to cross-correlation of visibility noise, Radio Sci., 38(4), 1067, doi:10.1029/2002RS002707.
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