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

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.

本研究的目的是研制一种L波段低对流层雷达（LTR）来观测整个对流层低层的大气。我们首先设计了雷达系统，并开发了尺寸较大的4m×4m相控阵天线。下一代发射机的输出功率为 2kW，带宽为 10 MHz，最大占空比为 20%，LTR 安装在信乐 MU 天文台。 1999年，我们用MU雷达、边界层雷达、多普勒汽水、风速计等进行了同步观测，并确认了LTR观测的可靠性。我们开发了使用LTR和8个扬声器的RASS（无线电声学探测系统）。我们将 LTR/RASS 获得的温度剖面与 MU 天文台发射的无线电探空仪数据进行了比较，研究了风速和湍流强度的日间和季节性变化。 LTR。