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@ARTICLE{Ttrai:185926,
      author       = {Tátrai, D. and Bozóki, Z. and Smit, H. and Rolf, C. and
                      Spelten, N. and Krämer, M. and Filges, A. and Gerbig, C.
                      and Gulyás, G. and Szabó, G.},
      title        = {{D}ual-channel photoacoustic hygrometer for airborne
                      measurements: background, calibration, laboratory and
                      in-flight intercomparison tests},
      journal      = {Atmospheric measurement techniques},
      volume       = {8},
      number       = {1},
      issn         = {1867-8548},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernicus},
      reportid     = {FZJ-2015-00050},
      pages        = {33 - 42},
      year         = {2015},
      abstract     = {This paper describes a tunable diode laser-based
                      dual-channel photoacoustic (PA) humidity measuring system
                      primarily designed for aircraft-based environment research.
                      It is calibrated for total pressure and water vapor (WV)
                      volume mixing ratios (VMRs) possible during airborne
                      applications. WV VMR is calculated by using
                      pressure-dependent calibration curves and a cubic spline
                      interpolation method. Coverage of the entire atmospheric
                      humidity concentration range that might be encountered
                      during airborne measurements is facilitated by applying an
                      automated sensitivity mode switching algorithm. The
                      calibrated PA system was validated through laboratory and
                      airborne intercomparisons, which proved that the
                      repeatability, the estimated accuracy and the response time
                      of the system are 0.5 ppmV or $0.5\%$ of the actual reading
                      (whichever value is the greater), $5\%$ of the actual
                      reading within the VMR range of 1–12 000 ppmV and 2 s,
                      respectively. The upper detection limit of the system is
                      theoretically about 85 000 ppmV, limited only by
                      condensation of water vapor on the walls of the 318 K heated
                      PA cells and inlet lines, and was experimentally verified up
                      to 20 000 ppmV. The unique advantage of the presented system
                      is its applicability for simultaneous water vapor and total
                      water volume mixing ratio measurements.},
      cin          = {IEK-7 / IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013 / I:(DE-Juel1)IEK-8-20101013},
      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:000348977600003},
      doi          = {10.5194/amt-8-33-2015},
      url          = {https://juser.fz-juelich.de/record/185926},
}