Development Sea Surface Measurement Technique by Using Microwave Scatterometer

发展微波散射仪海面测量技术

• 批准号: 15360462
• 负责人: RHEEM Chang-kyu
• 金额: $ 9.6万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15360462/
• 关键词: Microwave; Remote sensing; Sea Surface Measurement; Surface Current Method; Doppler Spectrum; Ocean Wave; Sea Surface Current; Wind; マイクロ波散乱計; 海面計測

The purpose of this research were the investigation of the microwave scattering characteristics on water surfaces which coexists wind, waves and currents, and the proposal of the sea surface measurement technique by active microwave remote sensing.First, we generated artificial water surfaces by known wind, currents and waves in an experimental water tank, and we examined the effects of wind, currents and waves on microwave scattering at that surface in detail. Then numerical simulation technique of microwave scattering on the water surface by surface current method was developed to evaluate microwave scattering in the real surface of the sea of more complicated shape, and microwave scattering characteristic at the surface of the sea by the numerical simulation was examined.As the result, some back scattering characteristics of microwaves on water surface in the following have been obtained.1)The back scattering strength depends on only the wind velocity, and no effects of currents and waves were.2)The middle frequency of Doppler spectrum of backscattering microwaves depends on the wind and current velocities.3)The band width of Doppler spectrum of back scattering microwaves depends on orbital velocity (drift speed of water particle in the surface of the water) of a wave.By these results, the previous researches have been confirmed, and the relations between Doppler spectrum and wind or waves were cleared. Further, on the basis of these results, the way to the sea surface measurement by active microwave remote sensing has been showed clearly.

本研究的目的是研究风、浪、流共存下水面的微波散射特性，提出主动微波遥感海面测量技术.首先，在实验水池中，利用已知的风、流、浪生成人工水面，考察风、浪、流对海面散射特性的影响，电流和波在该表面上的微波散射的细节。然后，为了研究更复杂形状的真实的海面的微波散射特性，发展了基于表面流法的海面微波散射数值模拟技术，并通过数值模拟研究了海面的微波散射特性，结果表明：得到了微波在水面上的后向散射特性：1）后向散射强度只与风速有关，后向散射微波多普勒谱的中频与风速和海流有关，后向散射微波多普勒谱的带宽与轨道速度有关（水粒子在水面上的漂移速度）。这些结果证实了以前的研究，明确了多普勒频谱与风、浪的关系。在此基础上，为主动微波遥感海面测量指明了方向。

项目成果

Sea surface Measurement by Using Microwave Scatterometer Part2 Study on the Relation between Sea Surface Condition and Microwave Scattering (Japanese)

利用微波散射仪测量海面第二部分海面状况与微波散射关系的研究（日文）

• 发表时间: 2004
• 期刊: Journal of the Society of Naval Architects of Japan Vol.194
• 作者: Chang-Kyu Rheem;Hidetaka Kobayashi;Kazuomi Yamanishi;Fumihiro Suzuki
• 通讯作者: Fumihiro Suzuki

DOPPLER SPECTRA OF MICRO WAVE BACKSCATTER FROM WATER SURFACE

水面微波后向散射的多普勒谱

• 发表时间: 2004
• 期刊: Proc.23th Int.Conf.Offshore Mechanics and Arctic Engineering (OMAE'04) OMAE2004-51272
• 作者: Chang-Kyu Rheem;Hidetaka Kobayashi;Kazuomi Yamanishi
• 通讯作者: Kazuomi Yamanishi

Sea surface Measurement by Using Microwave Scatterometer Part3 Numerical Simulation of Microwave Scattreing at Sea Surface (Japanese)

使用微波散射仪测量海面第三部分海面微波散射的数值模拟（日语）

• 发表时间: 2004
• 期刊: Journal of the Society of Naval Architects of Japan Vol.195
• 作者: Chang-Kyu Rheem;Hidetaka Kobayashi
• 通讯作者: Hidetaka Kobayashi

林昌奎, 小林豪毅, 山西一臣: "マイクロ波散乱における流れの影響に関する研究"第17回海洋工学シンポジウム. 79-84 (2003)

Chang-Kyu Lin，Goki Kobayashi，Kazuomi Yamanishi：“电流对微波散射的影响研究”第十七届海洋工程研讨会79-84（2003）。

海面におけるマイクロ波散乱メカニズムの解析

海面微波散射机理分析

• 发表时间: 2004
• 期刊: 海岸工学論文集 52
• 作者: 小林豪毅;林昌奎
• 通讯作者: 林昌奎