[obspy-users] Characteristics on Bode plot using Inventory.plot_response
sfunke at uni-leipzig.de
Fri Nov 10 10:45:04 CET 2017
thanks for fast and clear explanation. So not corner frequency is annotated
but frequency of overall sensitivity - makes sense.
On Freitag, 10. November 2017 10:35:55 CET Tobias Megies wrote:
> Hi Sigward,
> the values you see as annotations to the amplitude spectrum in the Bode
> plot are simply what is specified for the overall sensitivity in the
> given station metadata:
> from obspy import read_inventory
> response = read_inventory().response
> Instrument Sensitivity:
> Value: 943680000.0
> Frequency: 0.02
> Input units: M/S
> Input units description: Velocity in Meters per Second
> Output units: COUNTS
> Output units description: Digital Counts
> Usually this should be within the flat part of the response.
> On 10/11/17 10:10, Sigward Funke wrote:
> > Dear people of ObsPy,
> > where can I find some details (documentation) about 2 highlighted numbers
> > on Bode plot using Inventory.plot_response (see )?
> > * Right value shows plateau of amplitudes -- it's clear for me;
> > in : 9.4e+08.
> > * But top value (in : 0.02Hz = 50s) often don't show expected flat
> > regions lower corner frequency. Without knowledge of es
> > rdxample's details I
> > would expect in case  something around 0.01Hz = 100s (probably 120s =
> > STS2?). At least one of my STS2-plots shows exactly the same unexpected
> > value.
> > In my examples in 6 of 7 cases highlighted frequency don't match lower
> > corner, but in one case it fits well. So it could be possible that I'm
> > wrong to expect lower corner frequency for highlighting - but what else
> > frequency could be highlighted otherwise?
> > Best Regards
> > Sigward
> >  https://docs.obspy.org/packages/autogen/
> > obspy.core.inventory.response.Response.plot.html
> > _______________________________________________
> > obspy-users mailing list
> > obspy-users at lists.swapbytes.de
> > http://lists.swapbytes.de/mailman/listinfo/obspy-users
Sigward Funke Institut für Geophysik und Geologie
Tel. 0341 97-32816 Universität Leipzig
Fax. 0341 97-32809 Talstr. 35, 04103 Leipzig
E-mail: sfunke at uni-leipzig.de Raum 2-15
More information about the obspy-users