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Τίτλος: Comparison between empirical and physically based models of atmospheric correction
Συγγραφείς: Mandanici, Emanuele 
Franci, Francesca 
Bitelli, Gabriele 
Agapiou, Athos 
Alexakis, Dimitrios 
Hadjimitsis, Diofantos G. 
metadata.dc.contributor.other: Αγαπίου, Άθως
Αλεξάκης, Δημήτριος
Χατζημιτσής, Διόφαντος
Major Field of Science: Natural Sciences
Field Category: Earth and Related Environmental Sciences
Λέξεις-κλειδιά: Atmospheric correction models;Spectroradiometer measurements;Yialias river (Cyprus)
Ημερομηνία Έκδοσης: 1-Ιαν-2015
Πηγή: 3rd International Conference on Remote Sensing and Geoinformation of the Environment, RSCy 2015; Paphos; Cyprus; 16 March 2015 through 19 March 2015
DOI: 10.1117/12.2193176
Περίληψη: A number of methods have been proposed for the atmospheric correction of the multispectral satellite images, based on either atmosphere modelling or images themselves. Full radiative transfer models require a lot of ancillary information about the atmospheric conditions at the acquisition time. Whereas, image based methods cannot account for all the involved phenomena. Therefore, the aim of this paper is the comparison of different atmospheric correction methods for multispectral satellite images. The experimentation was carried out on a study area located in the catchment area of Yialias river, 20 km South of Nicosia, the Cyprus capital. The following models were tested, both empirical and physically based: Dark object subtraction, QUAC, Empirical line, 6SV, and FLAASH. They were applied on a Landsat 8 multispectral image. The spectral signatures of ten different land cover types were measured during a field campaign in 2013 and 15 samples were collected for laboratory measurements in a second campaign in 2014. GER 1500 spectroradiometer was used; this instrument can record electromagnetic radiation from 350 up to 1050 nm, includes 512 different channels and each channel covers about 1.5 nm. The spectral signatures measured were used to simulate the reflectance values for the multispectral sensor bands by applying relative spectral response filters. These data were considered as ground truth to assess the accuracy of the different image correction models. Results do not allow to establish which method is the most accurate. The physics-based methods describe better the shape of the signatures, whereas the image-based models perform better regarding the overall albedo.
URI: https://hdl.handle.net/20.500.14279/9583
ISBN: 978-162841700-5
Rights: © 2015 Copyright SPIE.
Type: Conference Papers
Affiliation: Cyprus University of Technology 
University of Bologna 
Publication Type: Peer Reviewed
Εμφανίζεται στις συλλογές:Δημοσιεύσεις σε συνέδρια /Conference papers or poster or presentation

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