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1989 Fiscal Year Final Research Report Summary

Measurements of snow stratigraphy and snowpack properties using a microwave radar

Research Project

Project/Area Number 62550316
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 計測・制御工学
Research InstitutionHokkaido Institute of Technology

Principal Investigator

SUZUKI Masahiro  Hokkaido Institute of Technology, Professor, 工学部, 教授 (10048035)

Co-Investigator(Kenkyū-buntansha) FUJINO Kazuo  I.L.T.S., Hokkaido University, Professor, 低温科学研究所, 教授 (50001649)
MOTOI Kazushi  Hokkaido Institute of Technology, Assistant, 工学部, 助手 (60118148)
SASAKI Masami  Hokkaido Institute of Technology, Lecturer, 工学部, 講師 (70196179)
Project Period (FY) 1987 – 1989
KeywordsMicrowave / FM-CW radar / Snowpack property / Snow stratigraphy / Remote sensing / Radar image
Research Abstract

The FM-CW radar has the characteristics of detecting reflection from the interfaces within the medium, and enable its to obtain the record of a profile through the medium. Using the microwave frequency, we have developed an FM-CW radar system for measuring snowpack properties and for adapting with field measurement over a long time.
In our system, the microwave frequency was swept linearly over the range, 6-12 GHz, in 10 ms. The microwave was emitted toward the snowpack surface, and reflected from various interfaces within the snowpack. The frequencies in the received signals were displayed on a monitor of spectrum analyzer. At the same time, the received signals in time domain transferred to the CPU for processing and storing. Then, the data collected in time domain were transformed to the frequency domain.
Using the frequencies corresponding to the interfaces within snowpack, the snowpack properties such as dielectric constant, density, water equivalent and so forth were calculated. The changes of the internal structure within snowpack were composed from the serial data obtained by the system, and shown in the images displayed on the CRT. And also, several interpretations of the images were given for 1) melting snowpack, 2) dry snowpack, 3) ice plate in the snowpack and 4) forming process of strata within snowpack.
The Marine Observation Satellite (MOS) - 1 is the first Japanese earth observation satellite launched in 1987. In 1988, using our FM-CW system, a series measurement of snowpack parameters were carried out for obtaining the ground truth data in Sapporo, synchronizing with the MOS-1 airborne verification program.
The FM-CW microwave system is fairly effective for remotely measuring snowpack properties and internal structure of snowpacks, and also has an availability for evaluation the data related snowpack parameters which were obtained by a passive microwave sensor mounting on the orbital satellite, such as MOS-1.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 鈴木勝裕: "FM-CWレ-ダによる積雪の内部構造の画像化" 北海道工業大学研究紀要. 16. 313-320 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 鈴木勝裕: "マイクロ波レ-ダ画像による乾雪と湿雪の内部構造の比較" 電子情報通信学会技術研究報告. AP88-13. 21-28 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐々木正巳: "積雪のマイクロ波特性の長期観測システムの試作ーーアンテナ着雪の影響評価への応用ーー" 電子情報通信学会技術研究報告. AP88ー14. 29-36 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐々木正巳: "マイクロ波レ-ダによる積雪層構造の長期観測結果の速報ーーアンテナ着雪の影響評価への応用ーー" 北海道工業大学研究記要. 17. 195-202 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐々木正巳: "Stratigraphic images of snowpack obtained by an FM-CW microwave system" Proceedings of the 1989 International Symposium on Antennas and Propagation. 4. 1045-1048 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 鈴木勝裕: "Snow observation by microwave scanning radiometer" Proceedings of the 1989 International Symposium on Antennas and Propagation. 4. 1049-1052 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Suzuki, M. Sasaki, T. Matsumoto and K. Fujino: "Radar image processing of the internal structure of snowpack" Memoirs of the Hokkaido Institute of Technology, No.16, 313-320, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Suzuki, M. Sasaki, T. Matsumoto and K. Fujino, T. Kamura and H. Ozawa: "Microwave radar images comparing the stratigraphic features of dry and wet snowpack" Papers of Tech. Group IEICE, AP 88-13, 21-28, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Sasaki, M. Suzuki, T. Matsumoto, K. Fujino, T. Kamura and H. Ozawa: "An experimental system to measure the microwave property of snowpack over a long time" Papers of Tech. Group IEICE, AP 88-14, 29-36, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Sasaki, M. Suzuki, T. Matsumoto and K. Fujino: "The most recent report on the internal structure of snowpack measured by a microwave radar over a long time" Memoirs of the Hokkaido Institute of Technology, No.17, 195-202, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Sasaki, M. Suzuki, T. Matsumoto, K. Fujino and T. Kawamura: "Stratigraphic images of snowpack obtained by an FM-CW microwave system" Proceedings of the International Symposium on Antennas and Propagation, Vol.4, 1045-1048, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Suzuki, M. Sasaki, T. Matsumoto, K. Fujino and T. Abe: "Snow observation by microwave scanning radiometer" Proceedings of the International Symposium on Antennas and Propagation, Vol.4, 1049-1052, 1989.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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