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Show simple item record Udahemuka, G Van Den Bergh, F Van Wyk, BJ Van Wyk, MA 2008-01-25T14:34:25Z 2008-01-25T14:34:25Z 2007-11
dc.identifier.citation Udahemuka, G et al. 2007. Robust fitting of diurnal brightness temperature cycle. 18th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA), Pietermaritzburg, Kwazulu-Natal, South Africa, 28-30 November 2007, pp 6 en
dc.identifier.isbn 978-1-86840-656-2
dc.description 2007: PRASA en
dc.description.abstract Land surface temperatures (LSTs) can be approximated from brightness temperatures observed from satellites. Estimation errors between observed brightness temperatures and a brightness temperature model of a given pixel would provide information for a pixel concerned. Robust fitting of observed Diurnal Temperature Cycle (DTC) taken over a day of a given pixel without cloud cover and other abnormally conditions such as fire can give a data based brightness temperature model for a given pixel. In this paper, diurnal brightness temperatures received from the METEOSAT Second Generation (MSG) satellite were interpolated for missing data based on a model, and a performance test was performed by comparing a new approach based on robust modelling with previous algorithms implemented on MSG data: An algorithm based on pseudo-physical modelling of the DTC and an algorithm based on Reproducing Kernel Hilbert Space (RKHS) interpolator. The simulation results show that the new approach outperforms the previous used criteria, in the sense that the true nonlinear model is more often found. en
dc.language.iso en en
dc.publisher 18th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA) en
dc.subject Model selection en
dc.subject Diurnal temperature cycle en
dc.subject METEOSAT second generation en
dc.title Robust fitting of diurnal brightness temperature cycle en
dc.type Presentation en

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