Development of an L-band Lower Troposphere Radar (LTR)

L 波段低层对流层雷达 (LTR) 的开发

• 批准号: 10354007
• 负责人: FUKAO Shoichiro
• 金额: $ 20.86万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10354007/
• 关键词: Atmospheric radar; L-band; Transportable; Lower troposphere; Phased array; RASS; Atmospheric radar; L-band; Transportable; Lower troposphere; Phased array; RASS

The purpose of this study is to develop an L-band lower troposphere radar (LTR) to observe the atmosphere in the whole lower troposphere.We first designed radar system, and developed a phased array antenna with a relatively large size of 4m×4m. Next transmitters, having the output power of 2kW, the band-width of 10 MHz, and the maximum duty ratio of 20%, were developed. The LTR was installed at the Shigaraki MU Observatory in 1999. We conducted simultaneous observations with the MU radar, a boundary layer radar, a Doppler sodar, an anemometer etc., and confirmed the reliability of the LTR observations. We developed RASS (Radio Acoustic Sounding System) using the LTR and eight speakers. Temperature profiles obtained by LTR/RASS were compared with radiosonde data launched at the MU Observatory. We investigated diurnal and seasonal variations of wind velocities and turbulence intensities obtained by the LTR.

这项研究的目的是开发一个L波段下对流层雷达（LTR），以观察整个对流层的大气。我们首先设计了雷达系统，并开发了一个相对大尺寸为4M×4M的梯形阵列天线。下一个具有2kW输出功率的发射器，10 MHz的带宽度和20％的最大占空比。 LTR于1999年安装在Shigaraki MU天文台上。我们与MU雷达，边界层雷达，多普勒SODAR，动脉仪表等同时进行了观察，并确认了LTR观测的可靠性。我们使用LTR和八个扬声器开发了RASS（无线电声音系统）。将通过LTR/RASS获得的温度曲线与在MU观测站发射的辐射数据进行了比较。我们研究了LTR获得的风速和湍流强度的昼夜和季节性变化。