high pass
6.In this paper,based on dense observational data of squall line and its objective analysis data the Barnes filter,the twenty-five points filter,and the high-order high-pass implicit filter are used for mesoscale filtering experiment.
7.For the above phenomenon, a kind of tank motion simulation washout filter algorithm was put forward, and a platform tilt-coordinate maneuver was used to simulate the low frequency motion cueing and high-pass filter method was used to attain the high frequency motion cueing.

