Filtering Data in JRG

With some data sets you may need to apply a bandpass filter to your traces to mitigate source-generated noise.

Choose In Place from the Methods menu to deselect it. Each filter attempt will then come up in a new window, which you can close if you don't like it. Go back to the source window to try again.
Select bpfilter from the On Each Vector sub-menu of the Methods menu. Leave the Pad factor at 2, and check that the Dt field shows the right time sampling.
Enter your filter frequencies, in hertz, into the last four fields of the dialog box. Try to have a 20% taper on each side of the bandpass. For example, entering Low, Down=40; Low, Up=50; High, Up=100, and High, Down=120 will cut below 40 Hz and above 120 Hz, and preserve frequencies in the 50-100 Hz band.
Press the bpfilter button.
If filtering has removed much amplitude from your plot, select Clip at 3*RMS from the Edit menu.
Try Animate again to check the result on all the records. Or drag the Plane Index slider back and forth.
If you are happy with the filtered data for picking, you can close the un-filtered window.