MR23-05C wavegauge Data

Microwave wave gauge (SJM-001), produced by Japan Radio Co. Ltd., was installed at the bow of R/V Mirai to obtain a continuous and detailed wave data along the ship trajectory. The sensor radiates microwave signal to the water surface and receive the reflected signal. Ba sed on the Doppler shift between the transmitted and the reflected microwaves, relative velocity of the water surface is measured and subsequently water surface displacement is estimated. The accelerometer and the gyro sensor are mounted on the sensor and used to remove the signal caused by ship motion. The absolute displacement of the water surface is obtained after the correction. The data is obtained at 10 Hz frequency, and spectral analysis for noise removal is conducted for every 20 minutes record.

日本无线电有限公司生产的微波测波仪（SJM-001）安装于Mirai号研究船（R/V Mirai）的船首，用于沿船舶航行轨迹获取连续且详细的波浪数据。该传感器向水面发射微波信号并接收反射信号。基于发射与反射微波之间的多普勒频移（Doppler shift），测量水面相对速度，进而估算水面位移。传感器上安装有加速度计和陀螺仪传感器，用于消除船舶运动产生的信号干扰。经校正后得到水面的绝对位移。数据采集频率为10赫兹，每20分钟记录进行一次噪声去除的频谱分析。