They return regularly to the surface (when the data is sent via polar-orbiting satellites) and are untroubled by surface ice.
它们会定期返回到水面——这时数据将通过极地轨道卫星发送出去——并且不会受到表面冰层的困扰。
The scattered light from the first laser is collected and analyzed with an interferometer to demodulate the surface vibrations caused by the return echoes of the ultrasound at the surface of the part.
由表面的超声表面位移使检测激光束散射以产生经相位调制的光；收集经相位调制的光；对经相位调制的光进行处理来获得代表表面处的超声表面位移的数据；
Because the radar performance is affected by the radar return signal form the land and sea surface, radar engineers have focused on the research on clutter's modeling and simulation.
来自地面、海面的雷达回波影响着雷达性能，所以对地海杂波进行建模与仿真技术研究已成为雷达工程师的关注焦点。
Because the radar performance is affected by the radar return signal form the land and sea surface, radar engineers have focused on the research on clutter's modeling and simulation.
来自地面、海面的雷达回波影响着雷达性能，所以对地海杂波进行建模与仿真技术研究已成为雷达工程师的关注焦点。
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