# obspy.io.sac.sacpz.attach_resp

`attach_resp`(tr, resp_file, todisp=False, tovel=False, torad=False, tohz=False)

  Extract key instrument response information from a RESP file, which can be extracted from a dataless SEED volume by, for example, using the script obspy-dataless2resp or the rdseed program. At the moment, you have to determine yourself if the given response is for velocity or displacement and if the values are given in rad or Hz. This is still experimental code (see also documentation for `obspy.io.sac.sacio.attach_paz()`). Attaches to a trace a paz AttribDict containing poles, zeros, and gain.

  Parameters: | tr An ObsPy `Trace` object resp_file path to RESP-file or file pointer todisp change a velocity transfer function to a displacement transfer function by adding another zero tovel change a displacement transfer function to a velocity transfer function by removing one 0,0j zero torad change to radians tohz change to Hertz

      >>> from obspy import Trace
      >>> import os
      >>> tr = Trace()
      >>> respfile = os.path.join(os.path.dirname(__file__), 'tests', 'data',
      ...                         'RESP.NZ.CRLZ.10.HHZ')
      >>> attach_resp(tr, respfile, torad=True, todisp=False)
      >>> for k in sorted(tr.stats.paz):
      ...     print(k)
      digitizer_gain
      gain
      poles
      seismometer_gain
      sensitivity
      t_shift
      zeros
      >>> print(tr.stats.paz.poles)
      [(-0.15931...+0.15931...j), (-0.15931...-0.15931...j),
       (-314.159...+202.318...j), (-314.159...-202.318...j)]

### 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)