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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/1989

Title: Robust fitting of diurnal brightness temperature cycle
Authors: Udahemuka, G
Van Den Bergh, F
Van Wyk, BJ
Van Wyk, MA
Keywords: Model selection
Diurnal temperature cycle
METEOSAT second generation
Issue Date: Nov-2007
Publisher: 18th Annual Symposium of the Pattern Recognition Association of South Africa (PRASA)
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
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.
Description: 2007: PRASA
URI: http://hdl.handle.net/10204/1989
ISBN: 978-1-86840-656-2
Appears in Collections:Remote Sensing
General science, engineering & technology

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