# obspy.signal.rotate.rotate2zne

`rotate2zne`(data_1, azimuth_1, dip_1, data_2, azimuth_2, dip_2, data_3, azimuth_3, dip_3, inverse=False)

  Rotates an arbitrarily oriented three-component vector to ZNE.

  Each components orientation is described with a azimuth and a dip. The azimuth is defined as the degrees from North, clockwise and the dip is the defined as the number of degrees, down from horizontal. Both definitions are according to the SEED standard.

  The three components need not be orthogonal to each other but the components have to be linearly independent. The function performs a full base change to orthogonal Vertical, North, and East orientations.

  Parameters: | data_1 Data component 1. azimuth_1 The azimuth of component 1. dip_1 The dip of component 1. data_2 Data component 2. azimuth_2 The azimuth of component 2. dip_2 The dip of component 2. data_3 Data component 3. azimuth_3 The azimuth of component 3. dip_3 The dip of component 3. inverse (bool) If True, the data arrays will be converted from ZNE to whatever coordinate system the azimuths and dips specify. In that case data_1, data_2, data_3 have to be data arrays for Z, N, and E and the dips and azimuths specify where to transform to.
  Return type: | Tuple of three NumPy arrays.
  Returns: | The three rotated components, oriented in Z, N, and E if inverse is False. Otherwise they will be oriented as specified by the dips and azimuths.

  An input of ZNE yields an output of ZNE

      >>> rotate2zne(np.arange(3), 0, -90, np.arange(3) * 2, 0, 0,             np.arange(3) * 3, 90, 0)
      (array([ 0., 1., 2.]), array([ 0., 2., 4.]), array([ 0., 3., 6.]))

  An input of ZSE yields an output of ZNE

      >>> rotate2zne(np.arange(3), 0, -90, np.arange(3) * 2, 180, 0,             np.arange(3) * 3, 90, 0)
      (array([ 0., 1., 2.]), array([ 0., -2., -4.]), array([ 0., 3., 6.]))

  Mixed up components should get rotated to ZNE.

      >>> rotate2zne(np.arange(3), 0, 0, np.arange(3) * 2, 90, 0,             np.arange(3) * 3, 0, -90)
      (array([ 0., 3., 6.]), array([ 0., 1., 2.]), array([ 0., 2., 4.]))

### 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)