Fixing the spectrum width of the weather echo signals, we change theirs mean Doppler frequency and filter them using regression filter. After filtering, we analyze the attenuation of them.

在天气回波信号谱宽固定的情况下，通过改变天气回波信号的平均多普勒频率，分析了回归滤波器对它的衰减情况。

youdao

The analysis of the virtual echo such as three -body scatter spike echo, the secondary echo, the side -lobe echo is given echo based on observational re cords of severe convectional weather in 2003.

根据2003年几次强对流天气的观测资料，对其中三体散射长钉、二次回波旁瓣回波等虚假回波进行了分析。

youdao

Tests indicate that this scheme is one of the effective ways to solve the problems of storage and long-distance transmission of weather radar echo images.

试验表明，该方案是解决天气雷达回波图像存储和远程传输的一种有效途径，并在气象业务工作中发挥了重要作用。

youdao

If the H1N1 flu virus or a weather event prevents students and faculty from getting to class or moving around campus, Echo 360 provides an answer.

FORBES: Digital Teaching Promises to Improve Grades