Junna preproc

[msilvafe]

Here I've merged into master #1396 and #1381 from @17-sugiyama to be able to set up a preprocessing flow and test running through 100 observations using this new processing collaboratively.

[satoru99]

Expected usage in preprocess config for my previous commit 8625498

process_pipe:
    # fit psd
    - name: "noise"
      skip_on_sim: False
      psd: "psdQ"
      fit: True
      calc:
        fwhite: [1, 2]
        f_max: 2
        merge_name: 'noise_fit_statsQ'
      save:
        wrap_name: "noise_fitQ"

    # apply counter 1/f
    - name: "fourier_filter"
      skip_on_sim: False
      signal_name: "demodQ"
      wrap_name: "demodQ"
      process:
        filt_function: "counter_1_over_f"
        noise_fit_array: "noise_fitQ"
        filter_params:
          each_detector: True

[17-sugiyama]

I have tested the new T2P function, scan frequency cutoff and counter 1/f filter with this config file, and they ran successfully.
The residual noise ASD after the all processes is shown below.
The peak around 10mHz is the scan synchronous residual noise, which can be eliminated by the common mode subtraction.

[msilvafe]

Some comments which @17-sugiyama and I talked about over zoom.

[17-sugiyama]

This is the comparison of the transfer function between sat-iso v3 and this process.
(reference:/scratch/gpfs/SIMONSOBS/sat-iso/v3/spectra/satp1/south/full-dataset/science/transfer_functions/transfer_function_SATp1_f150_south_science_x_SATp1_f150_south_science.npz)