Bachmann, Martin and Makarau, Aliaksei and Segl, Karl and Richter, Rudolf (2015) Estimating the Influence of Spectral and Radiometric Calibration Uncertainties on EnMAP Data Products—Examples for Ground Reflectance Retrieval and Vegetation Indices. Remote Sensing, 7 (8), pp. 10689-10714. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/rs70810689. ISSN 2072-4292.
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Official URL: http://www.mdpi.com/2072-4292/7/8/10689
Abstract
As part of the EnMAP preparation activities this study aims at estimating the uncertainty in the EnMAP L2A ground reflectance product using the simulated scene of Barrax, Spain. This dataset is generated using the EnMAP End-to-End Simulation tool, providing a realistic scene for a well-known test area. Focus is set on the influence of the expected radiometric calibration stability and the spectral calibration stability. Using a Monte-Carlo approach for uncertainty analysis, a larger number of realisations for the radiometric and spectral calibration are generated. Next, the ATCOR atmospheric correction is conducted for the test scene for each realisation. The subsequent analysis of the generated ground reflectance products is carried out independently for the radiometric and the spectral case. Findings are that the uncertainty in the L2A product is wavelength-dependent, and, due to the coupling with the estimation of atmospheric parameters, also spatially variable over the scene. To further illustrate the impact on subsequent data analysis, the influence on two vegetation indices is briefly analysed. Results show that the radiometric and spectral stability both have a high impact on the uncertainty of the narrow-band Photochemical Reflectance Index (PRI), and also the broad-band Normalized Difference Vegetation Index (NDVI) is affected.
Item URL in elib: | https://elib.dlr.de/97980/ | ||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||
Title: | Estimating the Influence of Spectral and Radiometric Calibration Uncertainties on EnMAP Data Products—Examples for Ground Reflectance Retrieval and Vegetation Indices | ||||||||||||||||||||
Authors: |
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Date: | 19 August 2015 | ||||||||||||||||||||
Journal or Publication Title: | Remote Sensing | ||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||
Gold Open Access: | Yes | ||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||
Volume: | 7 | ||||||||||||||||||||
DOI: | 10.3390/rs70810689 | ||||||||||||||||||||
Page Range: | pp. 10689-10714 | ||||||||||||||||||||
Editors: |
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Publisher: | Multidisciplinary Digital Publishing Institute (MDPI) | ||||||||||||||||||||
Series Name: | Special Issue "The Environmental Mapping and Analysis Program (EnMAP) Mission: Preparing for Its Scientific Exploitation" | ||||||||||||||||||||
ISSN: | 2072-4292 | ||||||||||||||||||||
Status: | Published | ||||||||||||||||||||
Keywords: | EnMAP; imaging spectroscopy; hyperspectral; uncertainty; radiometric stability; spectral stability; atmospheric correction | ||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||
HGF - Program Themes: | Earth Observation | ||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||
DLR - Program: | R EO - Earth Observation | ||||||||||||||||||||
DLR - Research theme (Project): | R - Vorhaben Fernerkundung der Landoberfläche (old), R - Vorhaben hochauflösende Fernerkundungsverfahren (old) | ||||||||||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||||||||||
Institutes and Institutions: | German Remote Sensing Data Center > Land Surface Remote Sensing Technology Institute > Photogrammetry and Image Analysis | ||||||||||||||||||||
Deposited By: | Makarau, Aliaksei | ||||||||||||||||||||
Deposited On: | 07 Sep 2015 16:26 | ||||||||||||||||||||
Last Modified: | 06 Nov 2023 09:12 |
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