1. Simple Cross Correlation: Use the cross-correlation to detect and determine the time shift of two test events with one template event.
2. Enhanced Picker: This has been taken from the [ObsPy Tutorial](https://docs.obspy.org/master/tutorial/code_snippets/xcorr_pick_correction.html). ObsPy is licensed under the [LGPL v3.0](https://www.gnu.de/documents/lgpl-3.0.en.html)
Interpolation and Deciamtion of Time Series using the DFT
### 05 - Spectrogram
1. Analysing dispersive signals. How to visualize changes in frequency content over time (moving window analysis, mutiple filter technique, instantaneous frequency, continuous wavelet transform, the uncertainty problem).
2. Filtering time series with non spectral filtering method.
### 06 - Surface Waves
Analysing phase and group velocity of recorded earthquake signals at one and two seismological stations.
