| 项目编号: | 1741712
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| 项目名称: | Construction of Mobile C-band, Narrow-Beam, Dual-Frequency, Dual-Polarization, High-Power Radar |
| 作者: | Joshua Wurman
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| 承担单位: | The Center for Severe Weather Research
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| 批准年: | 2017
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| 开始日期: | 2017-09-15
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| 结束日期: | 2018-08-31
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| 资助金额: | 367764
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Atmospheric and Geospace Sciences
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| 英文关键词: | crow
; c-band
; intense precipitation
; dual-polarization
; cm wavelength
; radar
; independent dual frequency
; x-band
; severe weather research
; differential reflectivity
; radar system
; dual-frequency c-band radar
; convective system
; high-impact outreach
; mobile c-band radar
; quick scanning
; fine-beamwidth radar
; scanning speed
; crow mobile radar
; dual-polarization capability
; 1-degree beamwidth
; custom-designed trailer
; little prior experience
; advance site preparation
; educational project
; mobile facility
; c-band operation
; radar antenna
; university/college educational mission
; independent frequency
; small crane
; accurate measurement
; meteorological application
; atmospheric boundary layer study
; predictable event
; research quality s-band
; requestable user facility
; single frequency radar
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| 英文摘要: | The Center for Severe Weather Research will construct a new quickly deployable, dual-polarization, dual-frequency C-band Radar On Wheels (CROW). CROW has an innovative design that will allow rapid deployment, has a small footprint and conveys the ability to peer deeply into intense precipitation. This radar system will provide a capability that is lacking in NSF's requestable user facilities and will open new avenues of investigation in the areas of severe weather research, including measurement of convective systems, tropical and winter storms, as well as atmospheric boundary layer studies. C-band (5 cm wavelength) radar is more capable of observing through intense precipitation than the X-band (3 cm wavelength) radar that is typical of mobile facilities, including the Doppler on Wheels (DOWs) that are currently part of the NSF Lower Atmosphere Observing Facilities. CROW, requiring no advance site preparation, will also be deployable for educational projects, permitting students to use a longer-wavelength, fine-beamwidth radar to observe phenomena containing intense precipitation. It will be designed to be operable by students with little prior experience, to promote hands-on learning opportunities. CROW will be a high-impact outreach and exhibition tool, easily, quickly, and inexpensively deployed not only to university/college educational missions, but also festivals, museums, and related venues.
The CROW mobile radar employs an innovative design to circumvent compromises between resolution and size that are inherent in existing radars. CROW will have a 1-degree beamwidth and quick scanning, independent dual frequencies to allow for high spatial and temporal resolution. Dual-polarization capability, coupled with the independent frequencies, will permit accurate measurements of differential reflectivity (ZDR), from which droplet type is identified, at twice the scanning speed of single frequency radars. CROW will be outfitted with two 1-megawatt transmitters to permit higher sensitivity to clear-air and weak distant signals than any existing mobile C-band radar and comparable to that of research quality S-band (10 cm wavelength) systems typically used for meteorological applications. CROW will be built on a custom-designed trailer that includes a small crane for assembling the radar antenna on-site, thereby enabling transport of a twelve-foot diameter antenna necessary for C-band operations. Set-up and assembly of the radar antenna and associated structures is estimated to take about two hours, making the system suitable for observation of predictable events, but not for targeting of rapidly evolving phenomena, such as tornadoes. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/88766
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Joshua Wurman. Construction of Mobile C-band, Narrow-Beam, Dual-Frequency, Dual-Polarization, High-Power Radar. 2017-01-01.
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