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Ground Reflectance Retrieval on Horizontal and Inclined Terrains Using the Software Package REFLECT

1
Department of Applied Geomatics, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
2
Department of Geography, Université de Montréal, Montreal, QC H2V 2B8, Canada
3
Agriculture and Agri-Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(10), 1638; https://doi.org/10.3390/rs10101638
Received: 31 August 2018 / Revised: 7 October 2018 / Accepted: 12 October 2018 / Published: 15 October 2018
(This article belongs to the Special Issue Data Restoration and Denoising of Remote Sensing Data)
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Abstract

This paper presents the software package REFLECT for the retrieval of ground reflectance from high and very-high resolution multispectral satellite images. The computation of atmospheric parameters is based on the 6S (Second Simulation of the Satellite Signal in the Solar Spectrum) routines. Aerosol optical properties are calculated using the OPAC (Optical Properties of Aerosols and Clouds) model, while aerosol optical depth is estimated using the dark target method. A new approach is proposed for adjacency effect correction. Topographic effects were also taken into account, and a new model was developed for forest canopies. Validation has shown that ground reflectance estimation with REFLECT is performed with an accuracy of approximately ±0.01 in reflectance units (for the visible, near-infrared, and mid-infrared spectral bands), even for surfaces with varying topography. The validation of the software was performed through many tests. These tests involve the correction of the effects that are associated with sensor calibration, irradiance, and viewing conditions, atmospheric conditions (aerosol optical depth AOD and water vapour), adjacency, and topographic conditions. View Full-Text
Keywords: ground reflectance retrieval; radiometric corrections; atmospheric corrections; topographic corrections; 6S code; dark target method ground reflectance retrieval; radiometric corrections; atmospheric corrections; topographic corrections; 6S code; dark target method
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Bouroubi, Y.; Batita, W.; Cavayas, F.; Tremblay, N. Ground Reflectance Retrieval on Horizontal and Inclined Terrains Using the Software Package REFLECT. Remote Sens. 2018, 10, 1638.

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