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Development of Open-Source-Based Software Planetary Atmospheric Spectrum Calculator (PASCAL) Specified for Millimeter/Submillimeter Observation of Titan with ALMA

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Computational Science and Its Applications – ICCSA 2021 (ICCSA 2021)

Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 12953))

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Abstract

To illustrate planetary atmospheric environment, such as a three-dimensional structure of trace gases, combination of high precision millimeter and submillimeter-wave spectroscopic remote-sensing and an advanced information processing technology is crucial. By combining the open-source radiative transfer code Planetary Spectrum Generator (PSG) and the Python libraries SciPy and astropy, we have constructed the molecular profile derivation tool Planetary Atmospheric Spectrum CALculator (PASCAL), which focuses on analysis of data of Titan observed by the Atacama Large Millimeter/submillimeter Array (ALMA). PASCAL successfully retrieved the vertical profile of an isotopomer of a gaseous hydrogen cyanide (H\(^{13}\)CN) J = 3–2 rotational transition, where J is the rotational constant, from ALMA archival data. Further, it successfully determined that the northern high-latitude region has 27\(\%\) higher column density than the south as seen in the intensity map. In addition, an installed parallelization method succeeded in decreasing the calculation time with its parallel speedup value \(\sim \)20 using 32 processors applying coordinate parallelization.

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Notes

  1. 1.

    https://docs.scipy.org/doc/scipy/reference/generated/scipy.optimize.leastsq.html.

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Acknowledgements

TI is grateful to Mitaro Namiki of Tokyo University of Agriculture and Technology for his advices on the entire study. Also, TI is also grateful to Hideo Sagawa for discussions about the improvement of retrieval program and usage of ALMA data. Authors are grateful to Geronimo Villanueva, a developer of PSG, for his kind support for the usage of PSG. This work was financially supported by a Telecommunications Advancement Foundation, JSPS Kakenhi grants (17K14420, 19K14782) and an Astrobiology Center Program of National Institutes of Natural Sciences (NINS) grants. This paper makes use of the following ALMA data: ADS/JAO.ALMA\(\#\)2012.1.00453.S. ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile. The Joint ALMA Observatory is operated by ESO, AUI/NRAO and NAOJ.

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Authors and Affiliations

  1. Information Technology Center, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-8658, Japan

    Takahiro Iino

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  1. Takahiro Iino
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Correspondence to Takahiro Iino .

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Editors and Affiliations

  1. University of Perugia, Perugia, Italy

    Osvaldo Gervasi

  2. University of Basilicata, Potenza, Potenza, Italy

    Beniamino Murgante

  3. Covenant University, Ota, Nigeria

    Sanjay Misra

  4. University of Cagliari, Cagliari, Italy

    Chiara Garau

  5. University of Cagliari, Cagliari, Italy

    Ivan Blečić

  6. Monash University, Clayton, VIC, Australia

    David Taniar

  7. Kyushu Sangyo University, Fukuoka, Japan

    Bernady O. Apduhan

  8. University of Minho, Braga, Portugal

    Ana Maria A. C. Rocha

  9. Polytechnic University of Bari, Bari, Italy

    Eufemia Tarantino

  10. Polytechnic University of Bari, Bari, Italy

    Carmelo Maria Torre

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Iino, T. (2021). Development of Open-Source-Based Software Planetary Atmospheric Spectrum Calculator (PASCAL) Specified for Millimeter/Submillimeter Observation of Titan with ALMA. In: Gervasi, O., et al. Computational Science and Its Applications – ICCSA 2021. ICCSA 2021. Lecture Notes in Computer Science(), vol 12953. Springer, Cham. https://doi.org/10.1007/978-3-030-86976-2_16

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  • DOI: https://doi.org/10.1007/978-3-030-86976-2_16

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-86975-5

  • Online ISBN: 978-3-030-86976-2

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