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    RadCalNet: A Radiometric Calibration Network for Earth Observing Imagers Operating in the Visible to Shortwave Infrared Spectral Range

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    remotesensing-11-02401-v2.pdf
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    Description:
    Final Published Version
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    Author
    Bouvet, Marc
    Thome, Kurtis
    Berthelot, Beatrice
    Bialek, Agnieszka
    Czapla-Myers, Jeffrey
    Fox, Nigel P
    Goryl, Philippe
    Henry, Patrice
    Ma, Lingling
    Marcq, Sebastien
    Meygret, Aime
    Wenny, Brian N
    Woolliams, Emma R
    Show allShow less
    Affiliation
    Univ Arizona, Coll Opt Sci
    Issue Date
    2019-10-16
    Keywords
    RadCalNet
    CEOS
    radiometric calibration
    SI-traceable
    surface reflectance
    network
    instrument
    
    Metadata
    Show full item record
    Publisher
    MDPI
    Citation
    Bouvet, M.; Thome, K.; Berthelot, B.; Bialek, A.; Czapla-Myers, J.; Fox, N.P.; Goryl, P.; Henry, P.; Ma, L.; Marcq, S.; Meygret, A.; Wenny, B.N.; Woolliams, E.R. RadCalNet: A Radiometric Calibration Network for Earth Observing Imagers Operating in the Visible to Shortwave Infrared Spectral Range. Remote Sens. 2019, 11, 2401.
    Journal
    REMOTE SENSING
    Rights
    Copyright © 2019 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/).
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Vicarious calibration approaches using in situ measurements saw first use in the early 1980s and have since improved to keep pace with the evolution of the radiometric requirements of the sensors that are being calibrated. The advantage of in situ measurements for vicarious calibration is that they can be carried out with traceable and quantifiable accuracy, making them ideal for interconsistency studies of on-orbit sensors. The recent development of automated sites to collect the in situ data has led to an increase in the available number of datasets for sensor calibration. The current work describes the Radiometric Calibration Network (RadCalNet) that is an effort to provide automated surface and atmosphere in situ data as part of a network including multiple sites for the purpose of optical imager radiometric calibration in the visible to shortwave infrared spectral range. The key goals of RadCalNet are to standardize protocols for collecting data, process to top-of-atmosphere reflectance, and provide uncertainty budgets for automated sites traceable to the international system of units. RadCalNet is the result of efforts by the RadCalNet Working Group under the umbrella of the Committee on Earth Observation Satellites (CEOS) Working Group on Calibration and Validation (WGCV) and the Infrared Visible Optical Sensors (IVOS). Four radiometric calibration instrumented sites located in the USA, France, China, and Namibia are presented here that were used as initial sites for prototyping and demonstrating RadCalNet. All four sites rely on collection of data for assessing the surface reflectance as well as atmospheric data over that site. The data are converted to top-of-atmosphere reflectance within RadCalNet and provided through a web portal to allow users to either radiometrically calibrate or verify the calibration of their sensors of interest. Top-of-atmosphere reflectance data with associated uncertainties are available at 10 nm intervals over the 400 nm to 1000 nm spectral range at 30 min intervals for a nadir-viewing geometry. An example is shown demonstrating how top-of-atmosphere data from RadCalNet can be used to determine the interconsistency between two sensors.
    Note
    Open access journal
    ISSN
    2072-4292
    DOI
    10.3390/rs11202401
    Version
    Final published version
    Sponsors
    European Space Agency Technology and Research Programme [4000110704]; European Space Agency Earthnet Programme [CCN5 4000110704]; Metrology for Earth Observation and Climate project (MetEOC-2) within the EMRP programme [ENV55 532]; EURAMET; European Union's FP7 programme; European Union's H2020 programme; European Space Agency Technology and Research Programme through the ACTION project; UK Government's Department for Business, Energy and Industrial Strategy (BEIS) through the UK's National Measurement System programmes; Bureau of International Co-operation Chinese Academy of SciencesChinese Academy of Sciences [181811KYSB20160040]; NASANational Aeronautics & Space Administration (NASA) [NNX14AE20G, NNX15AM86G, NNX16AL25G]; USGSUnited States Geological Survey [G14AC00371]; MetEOC-3 project under the EMPIR programme [16ENV03]
    ae974a485f413a2113503eed53cd6c53
    10.3390/rs11202401
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