HAI, a new airborne, absolute, twin dual-channel, multi-phase TDLAS-hygrometer: background, design, setup, and first flight data

Buchholz, Bernhard; Afchine, Armin; Klein, Alexander; Schiller, Cornelius; Krämer, Martina; Ebert, Volker

doi:https://doi.org/10.5194/amt-10-35-2017

Articles | Volume 10, issue 1

https://doi.org/10.5194/amt-10-35-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/amt-10-35-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 10, issue 1

Research article

|

03 Jan 2017

Research article |

| 03 Jan 2017

HAI, a new airborne, absolute, twin dual-channel, multi-phase TDLAS-hygrometer: background, design, setup, and first flight data

Bernhard Buchholz, Armin Afchine, Alexander Klein, Cornelius Schiller, Martina Krämer, and Volker Ebert

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Final revised paper (published on 03 Jan 2017)
Preprint (discussion started on 20 May 2016)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review', Anonymous Referee #1, 28 Jun 2016
RC2: 'amt-2016-167 Review', Anonymous Referee #2, 08 Aug 2016
RC3: 'Review', Anonymous Referee #3, 08 Sep 2016
AC1: 'Final author response to reviewer comments', Volker Ebert, 05 Oct 2016
AC2: 'Final author response to reviewer comments II', Volker Ebert, 05 Oct 2016

Short summary

HAI is a fully autonomous, airborne hygrometer for atmospheric investigations for simultaneous gas-phase/total H₂O detection on the HALO aircraft. HAI employs first-principle, direct, tunable diode laser absorption spectroscopy (dTDLAS) for calibration-free, absolute H₂O detection. HAI simultaneously measures at 1.4/2.6 µm and in closed-/open-path configuration, covers a H₂O range of 1–40 000ppmv at up to 1.4 ms time resolution and achieves precisions of 0.18/0.055 ppmv at 1.4/2.6 µm.