A Radiometric Uncertainty Tool for the Sentinel 2 Mission

Gorrono, Javier, Fomferra, N, Peters, M, Gascon, F, Underwood, Craig, Fox, NP, Kirches, G and Brockmann, C (2017) A Radiometric Uncertainty Tool for the Sentinel 2 Mission Remote Sensing, 9 (178).

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Abstract

In the framework of the European Copernicus programme, the European Space Agency (ESA) has launched the Sentinel-2 (S2) Earth Observation (EO) mission which provides optical high spatial resolution imagery over land and coastal areas. As part of this mission, a tool (named S2-RUT, from Sentinel-2 Radiometric Uncertainty Tool) has been developed. The tool estimates the radiometric uncertainty associated with each pixel in the top-of-atmosphere (TOA) reflectance factor images provided by ESA. This paper describes the design and development process of the initial version of the S2-RUT tool. The initial design step describes the S2 radiometric model where a set of uncertainty contributors are identified. Each of the uncertainty contributors is specified by reviewing the preand post-launch characterisation. The identified uncertainty contributors are combined following the guidelines in the ‘Guide to Expression of Uncertainty in Measurement’ (GUM) model and this combination model is further validated by comparing the results to a multivariate Monte Carlo Method (MCM). In addition, the correlation between the different uncertainty contributions and the impact of simplifications in the combination model have been studied. The software design of the tool prioritises an efficient strategy to read the TOA reflectance factor images, extract the auxiliary information from the metadata in the satellite products and the codification of the resulting uncertainty image. This initial version of the tool has been implemented and integrated as part of the Sentinels Application Platform (SNAP).

Item Type:	Article
Subjects :	Electronic Engineering
Divisions :	Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :	Name Email ORCID Gorrono, Javier j.gorrono@surrey.ac.uk Fomferra, N Peters, M Gascon, F Underwood, Craig C.Underwood@surrey.ac.uk Fox, NP Kirches, G Brockmann, C
Date :	21 February 2017
DOI :	10.3390/rs9020178
Copyright Disclaimer :	© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)
Uncontrolled Keywords :	uncertainty; Sentinel-2; RUT; GUM; radiometry
Depositing User :	Symplectic Elements
Date Deposited :	23 Feb 2017 10:32
Last Modified :	16 Jan 2019 17:12
URI:	http://epubs.surrey.ac.uk/id/eprint/813618

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