Title :
Correction of spatial errors in SMOS brightness temperature images
Author :
Lin, Wu ; Corbella, Ignasi ; Torres, Francesc ; Duffo, Nuria ; Martín-Neira, Manuel
Author_Institution :
Remote Sensing Lab., Univ. Politec. de Catalunya (UPC), Barcelona, Spain
Abstract :
Systematic spatial errors in SMOS brightness temperature images are successfully estimated by using a statistical analysis of measured data. A constant multiplicative mask is derived by averaging spatial errors of a large number of snapshots over the ocean. The mask has been obtained for the alias- free field of view region without the need of any geophysical model. It can be considered as part of the instrument characterization and is totally independent of the target to measure. When this mask is applied to regular SMOS brightness temperatures, the spatial artifacts are clearly reduced.
Keywords :
geophysical image processing; image reconstruction; oceanographic techniques; radiometers; seawater; statistical analysis; SMOS brightness temperature images; image reconstruction error; instrument characterization; multiplicative mask; ocean snapshot; soil moisture and ocean salinity satellite; spatial error correction; statistical analysis; Antennas; Brightness temperature; Image reconstruction; Oceans; Sea measurements; Temperature measurement; Interferometric radiometry; SMOS; calibration;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2011 IEEE International
Conference_Location :
Vancouver, BC
Print_ISBN :
978-1-4577-1003-2
DOI :
10.1109/IGARSS.2011.6050041
