FuncLab: A MATLAB Interactive Toolbox for Handling Receiver Function Datasets

FuncLab: A MATLAB Interactive Toolbox for Handling Receiver Function Datasets Screenshot of receiver function Trace Editing GUI. Wiggle traces of records in a selected table are displayed with blue (or red, not shown) fill denoting positive amplitudes and dark gray fill denoting negative amplitudes. Check boxes above waveforms allow the user to change the record status to “on” (checked) or “off” (unchecked). Unchecked records also shaded light gray. Scrollbar at the bottom allows the user to scan through all records listed in the table.
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We developed FuncLab, a new MATLAB graphical user interface (GUI) toolbox, for the management and analysis of teleseismic receiver functions. The ability to import and manage potentially large receiver function datasets within the MATLAB environment independent of the method of receiver function computation is the foundation of FuncLab. Additional modules for commonly employed processing and analysis methods, such as common conversion point and Hκ stacking, are built around the FuncLab management system. We also provide a framework for the development of future modules that implement alternative analysis methods. Users start by importing data in SAC format and creating an independent project with a formal directory structure, setup by FuncLab. Metadata, such as station and event information, for each record are stored in arrays housed within a MAT-file in the project directory. To handle large datasets and allow faster processing, FuncLab does not store receiver function or seismogram time series data in MAT-files, but rather selectively reads this data only during analysis or visualization processes. Through user-friendly GUIs, information and visualizations of each record are easily accessible. One of the key strengths of FuncLab is its ability to facilitate the always time-consuming pre-processing step of data selection, or trace editing, through visualization of many records at a time. Other processing, preference setting, and data export are also handled by GUIs, providing a combination of customization for experienced researchers and intuitive guidance for beginners. The IRIS Data Management Center is currently developing a conduit to provide receiver functions generated from the EarthScope Automated Receiver Survey (EARS) into a format that can be directly imported into FuncLab. FuncLab will be released to the community in late summer 2010.
</p><p>References
</p><p>Eagar, K.C. and M.J. Fouch, FuncLab: A MATLAB interactive toolbox for handling receiver function datasets, to be submitted to Computers and Geosciences, August 2010.
</p><p>Acknowledgements: We would like to thank Rick Aster and Gary Pavlis for organizing extremely helpful MATLAB tutorials on receiver functions for the IRIS/Earthscope Imaging Science Workshop at Washington University in 2006 that first inspired KCE to deal with this prob- lem in MATLAB. We would also like to thank Mike Thorne for his original SACLAB codes (http://web.utah.edu/thorne/software.html) for importing SAC files into MATLAB, much of which was modified for use with FuncLab. Thanks also to Manoch Bahavar and Chad Trabant of the IRIS Data Management Center and Philip Crotwell for extensive work in providing data products from the EARS project to be directly compatible with the new FuncLab MATLAB toolbox. This research was supported by National Science Foundation award EAR- 0548288 (MJF EarthScope CAREER grant).</p>

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