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@ARTICLE{Damm:155397,
      author       = {Damm, A. and Guanter, L. and Laurent, V. C. E. and
                      Schaepman, M. E. and Schickling, A. and Rascher, U.},
      title        = {{FLD}-based retrieval of sun-induced chlorophyll
                      fluorescence from medium spectral resolution airborne
                      spectroscopy data},
      journal      = {Remote sensing of environment},
      volume       = {147},
      issn         = {0034-4257},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2014-04564},
      pages        = {256 - 266},
      year         = {2014},
      abstract     = {Sun-induced chlorophyll fluorescence (Fs) is the radiation
                      flux emitted from chlorophyll molecules and can be used as a
                      remote sensing (RS) observable to be linked to plant
                      photosynthesis. Recently, significant progress has been made
                      to quantify Fs from RS data, but both retrieval and
                      interpretation of Fs remain challenging. In the case of
                      airborne sensors with a medium spectral resolution (< 2–4
                      nm), Fs is typically estimated using the Fraunhofer Line
                      Depth (FLD) approach focusing on atmospheric O2 absorption
                      bands. Most critical for accurate Fs retrievals based on
                      such methods is the characterization of atmospheric
                      scattering and absorption processes during data acquisition.
                      So far, detailed experimental evidence on the retrieval
                      accuracy of airborne measured Fs is lacking. We performed an
                      experiment using a low-flying aircraft equipped with a
                      non-imaging spectrometer acquiring medium spectral
                      resolution data during the course of one day, using a
                      repeat-track approach with changing flight altitudes. Fs in
                      the near infrared was retrieved using a semi-empirical
                      approach constraining the FLD based Fs retrieval from the
                      O2-A absorption band at 760 nm by using non-fluorescent
                      surfaces. We used a local sensitivity analysis to assess Fs
                      retrieval biases related to observational and atmospheric
                      parameters. Our results demonstrate a reliable Fs retrieval
                      from airborne data using reference surfaces and indicate the
                      need for accurate knowledge of atmospheric scattering and
                      absorption processes. This study contributes to an
                      estimation of the total error budget of Fs retrievals and
                      will serve as a practical guideline for Fs retrieval schemes
                      to be applied to medium resolution airborne spectroscopy
                      data.},
      cin          = {IBG-2},
      ddc          = {050},
      cid          = {I:(DE-Juel1)IBG-2-20101118},
      pnm          = {89582 - Plant Science (POF2-89582)},
      pid          = {G:(DE-HGF)POF2-89582},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000336186400021},
      doi          = {10.1016/j.rse.2014.03.009},
      url          = {https://juser.fz-juelich.de/record/155397},
}