Title:
FULL-POLARIZATION-RADAR-BASED METHOD FOR RECOGNIZING DISTRIBUTION CHARACTERISTICS OF FABRIC AND ICE FLOW FIELD INSIDE ICE SHEET
Document Type and Number:
WIPO Patent Application WO/2020/082920
Kind Code:
A1
Abstract:
A full-polarization-radar-data-based method for recognizing distribution characteristics of a fabric and an ice flow field inside an ice sheet. Since there is a correlation between a second-order fabric orientation tensor of an ice crystal inside an ice sheet and a dielectric constant tensor thereof, in the method, a dielectric constant tensor of each reflecting layer inside the ice sheet and a rotation angle thereof are obtained from a full-polarization radar echo signal using a layer-by-layer recurrence method, then a second-order orientation tensor characteristic value of an ice fabric is obtained by means of calculation and the type of the fabric is recognized, and then the direction and spatial distribution characteristic information of an ice flow are extracted according to a correlation between the fabric, stress deformation and the ice flow. The method has the characteristics of rapidness, high efficiency, no loss, low expense investment, etc., and a measurement method for radar detection is flexible and coverage is large; and spatial distribution information of a fabric and an ice flow field inside an ice sheet in a large range can be rapidly obtained by means of polarization radar measurement.
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Inventors:
WANG BANGBING (CN)
SUN BO (CN)
WANG JIAXIN (CN)
TIAN GANG (CN)
SHI ZHANJIE (CN)
ZHAO WENKE (CN)
SUN BO (CN)
WANG JIAXIN (CN)
TIAN GANG (CN)
SHI ZHANJIE (CN)
ZHAO WENKE (CN)
Application Number:
PCT/CN2019/104941
Publication Date:
April 30, 2020
Filing Date:
September 09, 2019
Export Citation:
Assignee:
UNIV ZHEJIANG (CN)
International Classes:
G01S13/88; G01S7/41
Foreign References:
| CN109283526A | 2019-01-29 | |||
| CN107103280A | 2017-08-29 | |||
| CN105242245A | 2016-01-13 | |||
| CN103605166A | 2014-02-26 |
Other References:
王帮兵 等 (WANG, BANGBING ET AL.): "南极冰盖内部结构特性研究—基于三维各向异性电磁波时域有限差分方法 (The Study of the COF Feature in the Antarctic Ice Sheet Based on 3-D Anisotropy FDTD Method)", 地球物理学报 (CHINESE JOURNAL OF GEOPHYSICS), vol. 52, no. 2, 30 April 2009 (2009-04-30), XP055709227, ISSN: 0001-5733
WANG, BANGBING ET AL.: "The internal COF features in Dome A of Antarctica revealed by multi-polarization-plane RES", APPLIED GEOPHYISCS, vol. 5, no. 3, 30 September 2008 (2008-09-30), XP055709232, ISSN: 1672-7975
KENICHI, M. ET AL.: "Crystal orientation fabrics within the Antarctic ice sheet revealed by a multipolarization plane and dual-frequency radar survey", JOURNAL OF GEOPHYSICAL RESEARCH, vol. 108, no. B10, 24 October 2003 (2003-10-24), pages 1 - 17, XP055709235, ISSN: 2169-9356
WANG, BANGBING ET AL.: "The internal COF features in Dome A of Antarctica revealed by multi-polarization-plane RES", APPLIED GEOPHYISCS, vol. 5, no. 3, 30 September 2008 (2008-09-30), XP055709232, ISSN: 1672-7975
KENICHI, M. ET AL.: "Crystal orientation fabrics within the Antarctic ice sheet revealed by a multipolarization plane and dual-frequency radar survey", JOURNAL OF GEOPHYSICAL RESEARCH, vol. 108, no. B10, 24 October 2003 (2003-10-24), pages 1 - 17, XP055709235, ISSN: 2169-9356
Attorney, Agent or Firm:
HANGZHOU QIUSHI PATENT OFFICE CO.,LTD. (CN)
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