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@ARTICLE{Song:858098,
      author       = {Song, Rui and Kaufmann, Martin and Ern, Manfred and
                      Ungermann, Jörn and Liu, Guang and Riese, Martin},
      title        = {{T}hree-dimensional tomographic reconstruction of
                      atmospheric gravity waves in the mesosphere and lower
                      thermosphere ({MLT})},
      journal      = {Atmospheric measurement techniques},
      volume       = {11},
      number       = {5},
      issn         = {1867-8548},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernicus},
      reportid     = {FZJ-2018-07016},
      pages        = {3161 - 3175},
      year         = {2018},
      abstract     = {Gravity waves (GWs) have been intensively studied over
                      recent decades because of their dominant role in the
                      dynamics of the mesosphere and lower thermosphere (MLT). The
                      momentum deposition caused by breaking GWs determines the
                      basic structure and drives the large-scale circulation in
                      the MLT. Satellite observations provide a way to qualify the
                      properties and effects of GWs on a global scale. As GWs can
                      propagate vertically and horizontally in the atmosphere,
                      resolving both horizontal and vertical wavelengths is
                      important for the quantification of a wave. However, this
                      can hardly be achieved by one instrument with a good spatial
                      coverage and resolution. In this paper, we propose a new
                      observation strategy, called "sweep mode", for a real
                      three-dimensional (3-D) tomographic reconstruction of GWs in
                      the MLT by modifying the observation geometry of
                      conventional limb sounding measurements. It enhances the
                      horizontal resolution that typical limb sounders can
                      achieve, while at the same time retaining the good vertical
                      resolution they have. This observation strategy is simulated
                      for retrieving temperatures from measurements of the
                      rotational structure of the O2 A-band airglow. The idea of
                      this observation strategy is to sweep the line of sight
                      (LOS) of the limb sounder horizontally across the orbital
                      track during the flight. Therefore, two-dimensional (2-D)
                      slices, i.e., vertical planes, that reveal the projection of
                      GWs can be observed in the direction along and across the
                      orbital track, respectively. The 3-D wave vector is then
                      reproduced by combining the projected 2-D wave slices in the
                      two directions. The feasibility of this sweep-mode
                      tomographic retrieval approach is assessed using simulated
                      measurements. It shows that the horizontal resolution in
                      both along- and across-track directions is affected by an
                      adjustable turning angle, which also determines the spatial
                      coverage of this observation mode. The retrieval results can
                      reduce the errors in deducing momentum flux substantially by
                      providing an unbiased estimation of the real horizontal
                      wavelength of a wave.},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {244 - Composition and dynamics of the upper troposphere and
                      middle atmosphere (POF3-244)},
      pid          = {G:(DE-HGF)POF3-244},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000433948500001},
      doi          = {10.5194/amt-11-3161-2018},
      url          = {https://juser.fz-juelich.de/record/858098},
}