Open dlnorgaard opened 7 years ago
For ticket #86 (rotations), take a look at page 95 in the Havskov and Ottemoller processing book, I think you have. Basically, we want to be able to input an earthquake epicenter or other arbitrary coordinates, either directly from a lat/lon input box, or from a location quakeml file, and rotate the horizontal components of a station to be radial and tangential to the azimuth to the epicenter/coords. I imagine this being done in the clipboard primarily but maybe also in the helicorder zoom window. It is primarily used to help make better picks of seismic phases, so I don’t think it’s needed in helicorder view, but maybe (?). I would just start in clipboard only.
If it were me implementing this, I would go to the SAC documentation and source C code and see how they did it:
http://ds.iris.edu/files/sac-manual/commands/rotate.html
Although, their implementation is more generalized than what I described above, which may or may not be desired.
this is a place to start. We can discuss more next week when I get back.
Jeremy
Once waves are rotated, display them in clipboard, e.g.:
Spoke to Stephanie (request came from her group) and she thought this was a low priority request. She is also not sure Swarm is necessarily the best place to do this.
VDAP Geophysics team would like ability to rotate seismic data within Swarm into Radial/Tangential directions base on location or as guesses by degree for determination of back azimuth.