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Basic Usage

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Arnav Sankaran edited this page Aug 1, 2016 · 7 revisions

ttpick.py

In general you will work with the buttons in AIMBAT-Qt from left to right.

Open the ttpick interface by running ttpick.py -p P eventfile.pkl.

Button Functions

  • Filter
    • Use if you want to apply a bandpass, lowpass, or highpass filter to your data
    • Select the options for your filter on the top of the filtering window
    • In the lower plot click to set the appropriate filters for your filtering algorithm
      • The top plot will update to show the outcome of your filter
    • Click apply to apply the filter to all the seisograms in your dataset
  • Align
    • Runs ICCS on the default cross correlation window
    • Centers plots around T1 picks
  • Sync
    • Copies the T2 pick from the array stack to all of the individual seismograms
  • Refine
    • Runs ICCS on the user chosen cross correlation window
    • Centers plots aroudn T2 picks
  • Finalize
    • Runs MCCC and generates final travel times
    • Output is writen to an mcp file
  • Sort
    • Orders seismograms based on selected option
    • Sort options
      • File Name
      • Quality
        • All
        • CCC
        • SNR
        • COH
      • Header
        • NPTS
        • B
        • E
        • Delta
        • STLA
        • STLO
        • Dist
        • AZ
        • BAZ
        • GCARC
  • SAC P2
    • Overlay's seismograms making it easier to find stray seismograms
    • Click on a wave and the seismogram will be written to the terminal
  • Map Stations
    • Plots the location of all the stations on a map
  • Save
    • Writes sac headers and option to pkl file
  • Quit
    • Exits the program

Picking Travel Times for an Event

  • Filter data at anytime if needed
  • Sort seismograms when needed
    • By default they are sorted lowest to highest quality
  • Select and deselect seismograms by clicking on them
    • They will change color to show that they have been selected / deselected
    • The colors for this can be changed in ttdefaults.conf
  • Click Align to run ICCS after deselecting bad seismograms
  • Select a cross correlation window on the stack by drawing on box on the stack plot
    • Don't worry about the y-axis of the box. Only the x axis of the box is used to get the cross correlation window and the y axis will be resize to fit the data in that window range
  • Select T2 picks by double clicking on the stack plot at the location you want to set the pick.
    • Once again on the x point of your click is important
  • Click sync to transfer the T2 pick to all of the seismograms
  • Click refine to run ICCS based on this new correlation window and T2 pick
    • Refine will center all the plots around the T2 pick
  • Deselect any other bad seismograms
  • Move an individual seismogram's T2 pick by double picking where you want the T2 pick to be on the seismogram's plot
  • Click Refine to run ICCS without the deselcted seismograms and with the moved T2 picks
  • Click Finalize to calculate the final T3 picks and write ouput to an mcp file
  • Click SAC P2 to find stray seismograms
    • Remove them and rerun Refine and Finalize
  • Click Map Stations to generate a map with the stations plotted
  • Click Save
    • This will write the sac headers and options to the pkl file
  • Click Quit
    • Exits the program

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