Function Modifications

[cehanagan]

Suggested, low-priority tasks:

• ts_from_mseed(): aside from documentation, make the "scale_factor" and "unit" parameters intuitive - they essentially serve the same functionality
• event(event_id=): right now, the usgs catalogue is used. It might be useful to incorporate other catalogues. obspy has a read_events function that takes in links to quakeml (which I believe is standard to the IRIS DMC)
• calc_hypocentral_dist(): Right now, the distance is calculated w/ pythagorous for the depth. This is approximately correct for short distances where curvature is negligible. It may be a good idea to include a separate calculation for epicentral distance - obsp also has a function, but a geopy wgs ellipsoid distance should suffice.
• suggestion for the processing.py linear_trend_correction. Might be useful to make the name calculate_linear_trend. This is helpful for using the tab-complete while coding so that all corrections follow the same first word (like calculate_tide_correction)
• After applying the butterworth filter, decimating_to_hourly instead of being applied directly to the timeseries object - I'm not sure why this is.