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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/amt-2018-189
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2018-189
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 13 Aug 2018

Research article | 13 Aug 2018

Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Atmospheric Measurement Techniques (AMT) and is expected to appear here in due course.

Spatial Heterodyne Observations of Water (SHOW) from a high altitude airplane: Characterization, performance and first results

Jeffery Langille1, Daniel Letros1, Adam Bourassa1, Brian Solheim1, Doug Degenstein1, Fabien Dupont2, and Daniel Zawada1 Jeffery Langille et al.
  • 1Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, S7N 5E2, Canada
  • 2ABB Inc., Quebec city, G1P 0B2, Canada

Abstract. The Spatial Heterodyne Observations of Water instrument (SHOW) is a limb-sounding satellite prototype that utilizes the Spatial Heterodyne Spectroscopy Technique (SHS), operating in a limb-viewing configuration, to observe limb-scattered sunlight in a vibrational band of water vapour within a spectral window from 1363nm to 1366nm. The goal is to retrieve high vertical and horizontal resolution measurements of water vapour in the upper troposphere and lower stratosphere. The prototype instrument has been configured for observations from NASA’s ER-2 high altitude airborne remote science airplane. Flying at a maximum altitude of ~21.34km with a maximum speed of ~760km/hr, the ER-2 provides a stable platform to simulate observations from a low-earth orbit satellite. Demonstration flights were performed from the ER-2 during an observation campaign from July 15–July 22, 2017. In this paper, we present the laboratory characterization work and the Level 0 to Level 1 processing of flight data that was obtained during an engineering flight performed on July 18th, 2017. Water vapour profile retrievals are presented and compared to in situ radiosonde measurements made of the same approximate column of air. These measurements are used to validate the SHOW measurement concept and examine the sensitivity of the technique.

Jeffery Langille et al.
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Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Jeffery Langille et al.
Jeffery Langille et al.
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