# obspy.taup.helper_classes.Arrival

class `Arrival`(phase, distance, time, purist_dist, ray_param, ray_param_index, name, purist_name, source_depth, receiver_depth, takeoff_angle=None, incident_angle=None)

  Bases: `builtins.object`

  Convenience class for storing parameters associated with a phase arrival.

  Variables: | phase (`SeismicPhase`) Phase that generated this arrival distance (float) Actual distance in degrees time (float) Travel time in seconds purist_dist (float) Purist angular distance (great circle) in radians ray_param (float) Ray parameter in seconds per radians name (str) Phase name purist_name (str) Phase name changed for true depths source_depth (float) Source depth in kilometers incident_angle (float) Angle (in degrees) at which the ray arrives at the receiver takeoff_angle (float) Angle (in degrees) at which the ray leaves the source pierce (`ndarray` (dtype = `TimeDist`)) Points pierced by ray path (`ndarray` (dtype = `TimeDist`)) Path taken by ray

  Attributes

  `__dict__` |
  `__doc__` | str(object=’‘) -> str
  `__module__` | str(object=’‘) -> str
  `__weakref__` | list of weak references to the object (if defined)
  `purist_distance` | Return the purist distance in degrees.
  `ray_param_sec_degree` | Return the ray parameter in seconds per degree.

  Special Methods

  `__dir__` | default dir() implementation
  `__format__` | default object formatter
  `__init__` |
  `__new__` | Create and return a new object.
  `__reduce__` | helper for pickle
  `__reduce_ex__` | helper for pickle
  `__sizeof__` | size of object in memory, in bytes
  `__str__` |
  `__subclasshook__` | Abstract classes can override this to customize issubclass().

### 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)