M.A.E. Apparecchiature Elettroniche srl Picking Software for Travel Times and Amplitudes of Seismograph Waveform TomTime

- FEATURES AND OPTIONAL - TomTime provides automatic picking (and manual repicking if necessary) of travel times and amplitudes for all common seismograph waveform files. Output is in the input format used by 3D tomographic program GeoTomCG. User can choose whether output files provide times and amplitudes, or just times. Times picked with automatic picking are first-breaks or first-peaks, and amplitudes are on the first, second, and third peaks following time pick. (These amplitudes must be processed before being used as input for GeoTomCG.) Minimum and maximum time limits can be set to guide auto-picking. Times and amplitude positions can be reset manually. TomTime can also write and read ASCII files of waveforms, which allows data to be examined with a spreadsheet. TomTime contains features to help obtain accurate time picks and amplitudes, even in noisy data. These features include versatile filtering and display options. Filtering options include smoothing with Parzen filters, low-cut filters from 10 Hz to 600 Hz, high-cut filters from 10 Hz to 2000 Hz, and notch filters. Frequency spectra for individual and selected combinations of traces can be plotted to help decide which filter to use and to estimate wavelengths. Frequency spectra can be saved in a file for spectral decomposition in attenuation investigations.