# Visual check PRFs with an user interface#

## Open the user interface#

Following previous steps, PRFs have been calculated and save to SAC files in a folder named as the station name.

net.sta
├── 2018.229.15.35.02_P_R.sac
├── 2018.229.15.35.02_P_T.sac
├── 2018.229.22.06.55_P_R.sac
├── 2018.229.22.06.55_P_T.sac
│......


For example, PRFs were saved in folder net.sta. the file name of the PRF must be in %Y.%j.%H.%M.%S_P_[RT].sac. Now input following command to open the UI to browse the PRFs and reject poor PRFs.

\$ pickrf /path/to/net.sta


The window will open as following image. Each page will display 20 PRFs. You can press z and c hotkey or click previous and next button for turning pages.

## Operations#

Directly click PRFs on the interface to set up them to ‘poor’ PRFs. The PRFs will turn gray when you click a PRF. If you click again, it will restored to a ‘good’ PRF.

When you have selected all PRFs, please click finish button to delete all ‘poor’ PRFs. Then a list file named as net.stafinallist.dat will be generated automatically in the folder, which include following columns

• Event name: the event name with format as %Y.%j.%H.%M.%S.

• Phase: the phase name (same as that in file name).

• Event latitude

• Event longitude

• Event depth

• Epicenter distance in degree

• Back-azimuth

• Ray-parameters in s/km

• Magnitude

• Gaussian factor

This list file is very important for derived method such as H-k stacking and CCP stacking.

## Other functions#

### enlarge and reduce visual amplitudes of the waveforms#

Buttons of Amp enlarge and Amp reduce are available to control the visual amplitudes.

### Preview all PRFs#

the space hotkey and preview button provide a function to plot all ‘good’ PRFs. Use ctrl+s on Linux/Windows and cmd+s on MacOS to save this figure as a PDF file.

## Keymap#

Key

Function

z

Page up

c

Page down

space

Preview all good PRFs

ctrl+s or cmd+s

Save preview

## Re-calculation of RFs#

As a final-list saved into RF output path, events information of RFs can be invoked for re-calculation if we need to change some parameters, such as gauss factor, bandwidth of filter or deconvolution method. After version 1.2.14, the prf command introduce a new option of -f for re-calculation using events in the final-list.