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Development of a radiative transfer model and laboratory pressure-broadening measurements for understanding terahertz radiation processes in planetary atmospheres.

Research Project

Project/Area Number 21K13985
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 17010:Space and planetary sciences-related
Research InstitutionNational Institute of Information and Communications Technology

Principal Investigator

Yamada Takayoshi  国立研究開発法人情報通信研究機構, テラヘルツ研究センター, 主任研究員 (00852261)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywordsテラヘルツ波 / 電磁波伝搬 / 分光測定 / 放射伝達モデル / 分子分光 / 火星 / 大気 / 火星大気 / 惑星大気科学 / リモートセンシング / 大気化学 / 惑星科学
Outline of Research at the Start

テラヘルツ波はダストに対する高い透過性や昼夜観測が可能なことから、惑星大気観測において、これまでの太陽光などを光源とした紫外および赤外線帯域と相補的な観測が可能である。本研究ではテラヘルツ波帯を用いた観測において、より高精度な観測データ解析を可能にするため、測定誤差に起因する分子分光パラメータの測定のための装置開発及び、電磁波電波伝搬モデルの構築を行う。

Outline of Final Research Achievements

Terahertz-wave remote-sensing for planetary atmospheres can be carried out with passive day/night observations and high spatial and frequency resolution. Analysis of its observed spectra requires a radiative transfer model, the accuracy of which also depends on the accuracy of the spectral parameters. In this study, the construction of a gas spectroscopy system in the 220-500 GHz band using a terahertz wave transmitter/receiver has been completed, enabling high-precision frequency resolution and simple bandwidth setting. The development of an electromagnetic wave propagation model and inverse analysis algorithm for the Martian atmosphere has also been completed, enabling the derivation of atmospheric vertical profiles from observed spectra and their vertical resolution and error evaluation using absorption intensity and pressure width parameters obtained in the laboratory.

Academic Significance and Societal Importance of the Research Achievements

今後テラヘルツ波帯での分光観測機会が増加する中、高精度な観測に加え、高精度な圧力幅定数などの分光パラメータも重要となる。本研究では220-500GHzでの広帯域なガス分光測定を開発したことにより、測定データが不十分だった吸収線パラメータの取得が可能になった。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (16 results)

All 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 5 results)

  • [Int'l Joint Research] Belgian Institute for Space Aeronomy(ベルギー)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Max Planck Institute(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Observation Capability of a Ground-Based Terahertz Radiometer for Vertical Profiles of Oxygen and Water Abundances in Martian Atmosphere2022

    • Author(s)
      Yamada Takayoshi、Baron Philippe、Neary Lori、Nishibori Toshiyuki、Larsson Richard、Kuroda Takeshi、Daerden Frank、Kasai Yasuko
    • Journal Title

      IEEE Transactions on Geoscience and Remote Sensing

      Volume: 60 Pages: 1-11

    • DOI

      10.1109/tgrs.2022.3152271

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ベクトルネットワークアナライザおよび周波数エクステンダーを用いたテラヘルツ波帯ガス吸収スペクトル測定装置の開発2023

    • Author(s)
      村上 謙熙, 山田 崇貴, 笠井 康子,金森 英人
    • Organizer
      第28回 大気化学討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] テラヘルツ波気観測のための、実験室吸収分光測定2023

    • Author(s)
      山田 崇貴, 金森 英人
    • Organizer
      第24回ミリ波サブミリ波受信機ワークショップ
    • Related Report
      2023 Annual Research Report
  • [Presentation] テラヘルツ波物性データベース構築2023

    • Author(s)
      山田 崇貴, 金森 英人, Wang Suyun, 笠井 康子, 宮本 英昭, 小林 真輝人, 竹村 知洋
    • Organizer
      日本航空宇宙学会 宇宙科学技術連合講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 野辺山45m電波望遠鏡による火星大気のCOおよびその同位体の観測と解析2023

    • Author(s)
      山田崇貴
    • Organizer
      宇宙電波懇談会シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] Contribution of chemical budget of δD-CH4 on δD-H2O in the equatorial lower stratosphere2022

    • Author(s)
      Takayoshi Yamada, Fudai Saito, Seidai Nara, Tomohiro Sato, Kaley A. Walker, Yukio Nakano, Yasuko Kasai
    • Organizer
      JpGU Meeting, 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Terahertz Emission of the Lunar Surface: Forward Modeling2022

    • Author(s)
      Wang Suyun, Takayoshi Yamada, Yasuko Kasai
    • Organizer
      International Radiation Symposium 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Current Status of a Development of Atmospheric Terahertz Radiation Simulator (ATRASU) Including Non-LTE Effects for Future Terahertz Space Missions2022

    • Author(s)
      Takayoshi Yamada, Wang Suyun, Yasuko Kasai
    • Organizer
      International Radiation Symposium 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] A THEORETICAL ERROR ANALYSIS OF A GROUND-BASED TERAHERTZ RADIOMETER FOR VERTICAL PROFILES OF OXYGEN AND WATER ABUNDANCES IN MARTIAN ATMOSPHERE FOR FUTURE MICRO SPACECRAFT2022

    • Author(s)
      Takayoshi Yamada, Philippe Baron, Lori Neary, Yasuko Kasai
    • Organizer
      44th COSPAR Scientific Assembly 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] TERAHERTZ SCATTERING AND EMISSION FROM THE LUNAR SURFACE2022

    • Author(s)
      Wang Suyun, Takayoshi Yamada, Kun-Shan Chen, Yasuko Kasai
    • Organizer
      International Geoscience and Remote Sesning Symposium 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] TSUKMI: Forward modeling for lunar terahertz exploration2022

    • Author(s)
      Wang Suyun, Takayoshi Yamada, Yasuko Kasai
    • Organizer
      Committee on Space Research 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 中緯度帯成層圏下部のメタン酸化によるδD-H2O寄与の観測2022

    • Author(s)
      山田崇貴、菊池初実、佐藤知紘、Kaley A. Walker、中野幸夫、吉田尚弘、笠井康子
    • Organizer
      第27回大気化学討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] テラヘルツ波物性データベース構築のための実験室測定システムの開発2022

    • Author(s)
      山田崇貴、金森英人、宮本英昭、小林真輝人、竹村 知洋、笠井康子
    • Organizer
      第 66 回宇宙科学技術連合講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] サブミリ波帯大気放射モデルを利用したALMA 火星COデータの解析2021

    • Author(s)
      山田崇貴(情報通信研究機構), 飯野孝浩(東京大学), 佐川英夫(京都産業大学), 笠井康子(情報通信研究機構)
    • Organizer
      日本天文学会2021年秋季年会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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