overall sensitivity in station inventory

Users Mailing List Archive
#1

Hi all,

is it possible to extract the overall sensitivity from the inventory of a station?

I am using ObsPy to download the station inventory with client.get_stations(…, level="response“) and retrieve the normalization factor with

inv[…][…][...].response.get_paz().normalization_factor

and the poles and zeros with

inv[…][…][...].response.get_paz().poles
inv[…][…][...].response.get_paz().zeros,

but I haven’t found an equivalent for the sensitivity yet.

Thank you very much, Boris Roesler

Northwestern University
Department of Earth and Planetary Sciences

#2

In [1]: inv = obspy.read_inventory()

In [2]: response = inv[0][0][0].response

In [3]: response.instrument_sensitivity
Out[3]:
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

In [4]: response.instrument_sensitivity.value
Out[4]: 943680000.0

cheers,
T

#3

Please also note the existence of this helper method:

https://docs.obspy.org/master/packages/autogen/obspy.core.inventory.response.Response.recalculate_overall_sensitivity.html

It recomputes the overall sensitivity based on all stages in case there
is reason to not trust the reported one.

Cheers!

Lion

#4

Thank you very much for all your answers, this has been really helpful!

Regards, Boris

Northwestern University
Department of Earth and Planetary Sciences