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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-2019-92
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2019-92
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 10 May 2019

Submitted as: research article | 10 May 2019

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Atmospheric Measurement Techniques (AMT).

Application of Parametric Speakers to Radio Acoustic Sounding System

Ahoro Adachi1 and Hiroyuki Hashiguchi2 Ahoro Adachi and Hiroyuki Hashiguchi
  • 1Meteorological Research Institute, Tsukuba, 305-0052, Japan
  • 2Research Institute for Sustainable Humanosphere, Kyoto University, Uji, 611-0011, Japan

Abstract. In this study, a wind profiler with radio acoustic sounding system (RASS) and operational radiosonde measurements were used to investigate the technical practicability and reliability of using parametric speakers to measure the vertical profile of virtual temperature. Characteristics of parametric speakers include high directivity and very low sidelobes, which are preferable for RASS, especially those operating at urban areas, if this type of speaker exhibits reliability comparable with acoustic speakers for RASS measurements. The experiments were conducted on fine days with light winds to mitigate the effects of the horizontal and vertical components of wind on acoustic waves used for RASS. The results of this study indicated that, although parametric speaker RASS is susceptible to horizontal winds due to the narrower acoustic beam, bias and standard deviation of parametric speaker RASS/radiosonde virtual temperature difference (0.1 °C, 0.4 °C) were close to that from acoustic speakers (0.0 °C, 0.4 °C). In addition, when compared with acoustic speaker RASS, the values for the parametric speaker RASS were even smaller (0.1 °C, 0.2 °C). Based on these results, it is concluded that the parametric speaker RASS has accuracy and precision comparable with acoustic speaker RASS despite its high directivity of sound.

Ahoro Adachi and Hiroyuki Hashiguchi
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Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Ahoro Adachi and Hiroyuki Hashiguchi
Ahoro Adachi and Hiroyuki Hashiguchi
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Latest update: 17 Aug 2019
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Short summary
The radio acoustic sounding system is a remote sensing technique that provides vertical profiles of temperature in the air. Since RASS is accompanied with loud noise around the site, acoustic sources having low sidelobe levels has been desired. Thus, the application of parametric acoustic array as a high directivity acoustic source was exploited in this study. The results show that the PAA-RASS has accuracy and precision comparable with conventional RASS despite its high directivity of sound.
The radio acoustic sounding system is a remote sensing technique that provides vertical profiles...
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