# obspy.core.inventory.response.ResponseStage.__init__

`ResponseStage.``__init__`(stage_sequence_number, stage_gain, stage_gain_frequency, input_units, output_units, resource_id=None, resource_id2=None, name=None, input_units_description=None, output_units_description=None, description=None, decimation_input_sample_rate=None, decimation_factor=None, decimation_offset=None, decimation_delay=None, decimation_correction=None)

  Parameters: | stage_sequence_number (int) Stage sequence number, greater or equal to zero. This is used in all the response SEED blockettes. stage_gain (float) Value of stage gain. stage_gain_frequency (float) Frequency of stage gain. input_units (str) The units of the data as input from the perspective of data acquisition. After correcting data for this response, these would be the resulting units. Name of units, e.g. “M/S”, “V”, “PA”. output_units (str) The units of the data as output from the perspective of data acquisition. These would be the units of the data prior to correcting for this response. Name of units, e.g. “M/S”, “V”, “PA”. resource_id (str) This field contains a string that should serve as a unique resource identifier. This identifier can be interpreted differently depending on the data center/software that generated the document. Also, we recommend to use something like GENERATOR:Meaningful ID. As a common behavior equipment with the same ID should contains the same information/be derived from the same base instruments. resource_id2 (str) This field contains a string that should serve as a unique resource identifier. Resource identifier of the subgroup of the response stage that varies across different response stage types (e.g. the poles and zeros part or the FIR part). name (str) A name given to the filter stage. input_units_description (str, optional) The units of the data as input from the perspective of data acquisition. After correcting data for this response, these would be the resulting units. Description of units, e.g. “Velocity in meters per second”, “Volts”, “Pascals”. output_units_description (str, optional) The units of the data as output from the perspective of data acquisition. These would be the units of the data prior to correcting for this response. Description of units, e.g. “Velocity in meters per second”, “Volts”, “Pascals”. description (str, optional) A short description of of the filter. decimation_input_sample_rate (float, optional) The sampling rate before the decimation in samples per second. decimation_factor (int, optional) The applied decimation factor. decimation_offset (int, optional) The sample chosen for use. 0 denotes the first sample, 1 the second, and so forth. decimation_delay (float, optional) The estimated pure delay from the decimation. decimation_correction (float, optional) The time shift applied to correct for the delay at this stage.

  Note

  The stage gain (or stage sensitivity) is the gain at the stage of the encapsulating response element and corresponds to SEED blockette 58. In the SEED convention, stage 0 gain represents the overall sensitivity of the channel. In this schema, stage 0 gains are allowed but are considered deprecated. Overall sensitivity should be specified in the InstrumentSensitivity element.

### Thank you!

We would like to thank our contributors, whose efforts make this software what it is. These people have helped by writing code and documentation, and by testing. They have created and maintained this product, its associated libraries and applications, our build tools and our web sites.

#### Contributors

- Ackerley, Nick
- Allgeyer, Sebastien
- Ammon, Charles J.
- Antunes, Emanuel
- Arnarsson, Ólafur St.
- Bank, Markus
- Barsch, Robert
- Behr, Yannik
- Bernardi, Fabrizio
- Bernauer, Felix
- Bes de Berc, Maxime
- Beyreuther, Moritz
- Boltz, Shawn
- Bonaimé, Sébastien
- Carothers, Lloyd
- Chamberlain, Calum
- Chambers, Derrick
- Chen, Zhao
- Clark, Adam
- Danecek, Peter
- Egdorf, Sven
- Engels, Fabian
- Ermert, Laura
- Eulenfeld, Tom

- Fabbri, Tommaso
- Falco, Nicholas
- Fee, Jeremy
- Grellier, Clément
- Grunberg, Marc
- Hammer, Conny
- Heimann, Sebastian
- Heiniger, Lukas
- Hope, Gaute
- Igel, Heiner
- Inza, Adolfo
- Isken, Marius
- Ketchum, David
- Koymans, Mathijs
- Kremers, Simon
- Kress, Victor
- Krieger, Lars
- Krischer, Lion
- Kula, Damian
- Käufl, Paul
- Köhler, Andreas
- Lecocq, Thomas
- Leeman, John
- Legovini, Paride

- Lesage, Philippe
- Li, Yulin
- Lomax, Anthony
- Lopes, Rui L.
- MacCarthy, Jonathan
- Maggi, Alessia
- Martin, Henri
- Medlin, Andrew
- Megies, Tobias
- Meschede, Matthias
- Michelini, Alberto
- Miller, Nathaniel C.
- Morgenstern, Bernhard
- Nof, Ran Novitsky
- Panning, Mark P.
- Parker, Tom
- Pestourie, Romain
- Rapagnani, Giovanni
- Reyes, Celso
- Ringler, Adam
- Rothenhäusler, Nicolas
- Russo, Emiliano
- Sales de Andrade, Elliott

- Satriano, Claudio
- Saul, Joachim
- Scheingraber, Chris
- Schneider, Simon
- Sippl, Christian
- Snoke, Arthur
- Stange, Stefan
- Stähler, Simon C.
- Sullivan, Benjamin
- Tian, Dongdong
- Trabant, Chad
- Trani, Luca
- Uieda, Leonardo
- Walker, Andrew
- Walther, Marcus
- Wassermann, Joachim
- Williams, Mark C.
- Winkelman, Andrew
- Zaccarelli, Riccardo
- Zad, Seyed Kasra Hosseini
- Zhu, Lijun
- van Driel, Martin
- van Wijk, Kasper

#### Funds

ObsPy was partially funded by the

- German Science Foundation (DFG) via grant DFG IG 16/9-1
- German Ministry for Education and Research (BMBF), GEOTECHNOLOGIEN grant 03G0646H.
- NERA project (Network of European Research Infrastructures for Earthquake Risk Assessment and Mitigation) under the European Community's Seventh Framework Programme (FP7/2007-2013) grant agreement n° 262330
- Leibniz Institute for Applied Geophysics (LIAG)
- VERCE EU-FP7 project (no. 283543)