Research on the effect of the ground clutter on the measurement of the precipitation by the spaceborne millimeter wave precipitation radar
地杂波对星载毫米波降水雷达测量降水的影响研究
基本信息
- 批准号:13490026
- 负责人:
- 金额:$ 11.14万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2001
- 资助国家:日本
- 起止时间:2001 至 2004
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
For the design of the future millimeter wave spaceborne precipitation radar, such as the 35.5GHz radar onboard the GPM(Global Precipitation Measurement) mission, the adverse effects of the ground clutter in the antenna sidelobe area must be evaluated in order to precisely measure the precipitation echo from the antenna mainlobe area. Therfore it is indispensable to measure the precise values of the basic normalized radar scattering cross section σ^0 of the ground surface. The 35.5GHz step frequency polarimetric scatterometer is designed and developed to measure basic normalized radar scattering cross section of the ground surface. The scatterometer uses the vector network analyzer as the transmitter and receiver and two standard horn antennas are used for the transmitter and receiver antennas. The scatterometer is mounted on the top of the tower whose height is variable from 1 meter to 3 meters. The scattering cross section σ^0 of the soil varies as the soil surface roughness and soil moisture content changes. The complex dielectric constant which is the basic parameter to determine the value of σ^0 is the function of the soil moisture content. In order to measure the σ^0 of the soil surface as functions of the surface roughness and soil moisture content, the turn table is manufactured to mount a sample of the soil surface. The turn table rotates stepwisely by 360 degrees. The laser roughness meter and the instrument to measure complex dielectric constant are also prepared to measure soil roughness and soil complex dielectric constant, respectively. The normalized radar scattering cross section σ^0 of the soil is measured as a function of the incidence angle by varying the soil roughness and soil moisture content as parameters. The σ^0 values does not depend on soil roughness so much when the incidence angle is about 10 degrees and it increases as the soil moisture content increases.
在未来毫米波星载测雨雷达的设计中,如用于全球测雨使命的35.5GHz毫米波星载测雨雷达,为了精确测量天线主瓣区的降水回波,必须评估天线副瓣区地杂波的不利影响。因此,测量地面基本归一化雷达散射截面σ^0的精确值是必不可少的。设计并研制了35.5GHz步进频率极化散射计,用于测量地面基本归一化雷达散射截面。该散射仪采用矢量网络分析仪作为发射机和接收机,发射天线和接收天线采用两个标准喇叭天线。散射仪安装在塔的顶部,塔的高度从1米到3米不等。土壤的散射截面σ^0随土壤表面粗糙度和土壤含水量的变化而变化。复介电常数是确定σ^0值的基本参数,它是土壤含水量的函数。为了测量作为表面粗糙度和土壤含水量的函数的土壤表面的σ^0,制造转台以安装土壤表面的样品。转台以360度步进旋转。研制了激光粗糙度仪和复介电常数测量仪,分别用于测量土壤粗糙度和土壤复介电常数。通过改变土壤粗糙度和土壤含水量作为参数,测量土壤的归一化雷达散射截面σ^0作为入射角的函数。当入射角约为10 °时,σ^0值与土壤粗糙度的关系不大,随土壤含水量的增加而增大。
项目成果
期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The Evaluation of Surface Clutter Interference with Precipitation Measurement by 35.5GHz Precipitation Radar onboard the GPM Core Satellite and an Approach to Suppress the Side Lobe Clutter
GPM核心卫星35.5GHz降水雷达降水测量中地表杂波干扰评估及旁瓣杂波抑制方法
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:Tetsuya Tagawa;Hiroshi Hanado;Ken'ichi Okamoto;Toshiaki Kozu
- 通讯作者:Toshiaki Kozu
GPM搭載35.5GHz降雨レーダによる降雨観測に及ぼす地表面クラッタの影響評価とサイドローブクラッタの新しい低減手法の検討
采用GPM的35.5GHz降雨雷达评估地表杂波对降雨观测的影响及减少旁瓣杂波的新方法研究
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:田川哲也;花土弘;岡本謙一;古津年章
- 通讯作者:古津年章
田川哲也, 花土弘, 岡本謙一, 古津年章: "GPM搭載35.5Hz降雨レーダによる降雨観測に及ぼす地表面クラッタの影響評価とサイドローブクラッタの新しい低減手法の検討"電子情報通信学会論文誌B. (発表予定). (2004)
Tetsuya Takawa、Hiro Hanadochi、Kenichi Okamoto、Toshiaki Furutsu:“使用配备 GPM 的 35.5Hz 降雨雷达评估地面杂波对降雨观测的影响,并研究减少旁瓣杂波的新方法” IEICE Transactions B(待公布) )(2004)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
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OKAMOTO Ken'ichi其他文献
OKAMOTO Ken'ichi的其他文献
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{{ truncateString('OKAMOTO Ken'ichi', 18)}}的其他基金
Research on the development of the next generation spaceborne combined multi-parameter precipitation observation system
下一代星载组合多参数降水观测系统研制研究
- 批准号:
22540453 - 财政年份:2010
- 资助金额:
$ 11.14万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Research on the development of the new spaceborne combined radar-radiometer precipitation observation system
新型星载雷达-辐射计联合降水观测系统研制研究
- 批准号:
19540466 - 财政年份:2007
- 资助金额:
$ 11.14万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Research on the development of data correction algorithm for expanding the observation area by the spaceborne precipitation radar
星载降水雷达扩大观测区域数据修正算法开发研究
- 批准号:
17540415 - 财政年份:2005
- 资助金额:
$ 11.14万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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18360239 - 财政年份:2006
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5448298 - 财政年份:2005
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Research Grants
Research on the development of data correction algorithm for expanding the observation area by the spaceborne precipitation radar
星载降水雷达扩大观测区域数据修正算法开发研究
- 批准号:
17540415 - 财政年份:2005
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$ 11.14万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Data assimilation of advanced precipitation radar to meso-scale numerical simulation and its application for rainfall and flood prediction
超前降水雷达中尺度数值模拟数据同化及其在降水洪水预报中的应用
- 批准号:
16360246 - 财政年份:2004
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$ 11.14万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Development of an Algorithm for Precipitation over Land by Using Space-based Precipitation Radar and Microwave Radiometer
利用天基降水雷达和微波辐射计开发陆地降水算法
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12450196 - 财政年份:2000
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分布式降水雷达数据库开发及其应用.
- 批准号:
10555177 - 财政年份:1998
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$ 11.14万 - 项目类别:
Grant-in-Aid for Scientific Research (B).
(SGER) BOREAS SSA Precipitation Radar
(SGER) BOREAS SSA 降水雷达
- 批准号:
9321105 - 财政年份:1994
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$ 11.14万 - 项目类别:
Standard Grant
Study on a unified signal processing algorithm for spaceborne precipitation radar
星载降水雷达统一信号处理算法研究
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06640559 - 财政年份:1994
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$ 11.14万 - 项目类别:
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