BUG: wrong valid range in FIR filter

Bug

Error description

There are some issues when using FIR Filter as separation frequencies is not working for temperature and pressure.

Error message

periodogram_hourly_input_filter_last.pdf

First guess on error origin

A view on a specific station input shows that the ends of the timeseries are affected by boundary effects.

It looks that FIR filter does not remove values that are outside the valid filter range (which starts after half of filter window size).

Error origin

Solution