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@ARTICLE{Krisch:856154,
      author       = {Krisch, Isabell and Ungermann, Jörn and Preusse, Peter and
                      Kretschmer, Erik and Riese, Martin},
      title        = {{L}imited angle tomography of mesoscale gravity waves by
                      the infrared limb-sounder {GLORIA}},
      journal      = {Atmospheric measurement techniques},
      volume       = {11},
      number       = {7},
      issn         = {1867-8548},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernicus},
      reportid     = {FZJ-2018-05790},
      pages        = {4327 - 4344},
      year         = {2018},
      abstract     = {Three-dimensional measurements of gravity waves are
                      required in order to quantify their direction-resolved
                      momentum fluxes and obtain a better understanding of their
                      propagation characteristics. Such 3-D measurements of
                      gravity waves in the lowermost stratosphere have been
                      provided by the airborne Gimballed Limb Observer for
                      Radiance Imaging of the Atmosphere (GLORIA) using full angle
                      tomography. Closed flight patterns of sufficient size are
                      needed to acquire the full set of angular measurements for
                      full angle tomography. These take about 2h and are not
                      feasible everywhere due to scientific reasons or air traffic
                      control restrictions. Hence, this paper investigates the
                      usability of limited angle tomography for gravity wave
                      research based on synthetic observations. Limited angle
                      tomography uses only a limited set of angles for tomographic
                      reconstruction and can be applied to linear flight patterns.
                      A synthetic end-to-end simulation has been performed to
                      investigate the sensitivity of limited angle tomography to
                      gravity waves with different wavelengths and orientations
                      with respect to the flight path. For waves with wavefronts
                      roughly perpendicular to the flight path, limited angle
                      tomography and full angle tomography can derive wave
                      parameters like wavelength, amplitude, and wave orientation
                      with similar accuracy. For waves with a horizontal
                      wavelength above 200km and vertical wavelength above 3km,
                      the wavelengths can be retrieved with less than $10\%$
                      error, the amplitude with less than $20\%$ error, and the
                      horizontal wave direction with an error below 10°. This is
                      confirmed by a comparison of results obtained from full
                      angle tomography and limited angle tomography for real
                      measurements taken on 25 January 2016 over Iceland. The
                      reproduction quality of gravity wave parameters with limited
                      angle tomography, however, depends strongly on the
                      orientation of the waves with respect to the flight path.
                      Thus, full angle tomography might be preferable in cases in
                      which the orientation of the wave cannot be predicted or
                      waves with different orientations exist in the same volume
                      and thus the flight path cannot be adjusted accordingly.
                      Also, for low-amplitude waves and short-scale waves full
                      angle tomography has advantages due to its slightly higher
                      resolution and accuracy.},
      cin          = {IEK-7 / JARA-HPC},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013 / $I:(DE-82)080012_20140620$},
      pnm          = {244 - Composition and dynamics of the upper troposphere and
                      middle atmosphere (POF3-244) / Tomographic retrievals of
                      temperature and trace gasses from GLORIA measurements
                      $(jiek72_20160501)$},
      pid          = {G:(DE-HGF)POF3-244 / $G:(DE-Juel1)jiek72_20160501$},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000439425200001},
      doi          = {10.5194/amt-11-4327-2018},
      url          = {https://juser.fz-juelich.de/record/856154},
}