# obspy.core.inventory.channel.Channel.__init__

`Channel.``__init__`(code, location_code, latitude, longitude, elevation, depth, azimuth=None, dip=None, types=None, external_references=None, sample_rate=None, sample_rate_ratio_number_samples=None, sample_rate_ratio_number_seconds=None, storage_format=None, clock_drift_in_seconds_per_sample=None, calibration_units=None, calibration_units_description=None, sensor=None, pre_amplifier=None, data_logger=None, equipment=None, response=None, description=None, comments=None, start_date=None, end_date=None, restricted_status=None, alternate_code=None, historical_code=None, data_availability=None)

  Parameters: | code (str) The SEED channel code for this channel location_code (str) The SEED location code for this channel latitude (`Latitude`) Latitude coordinate of this channel’s sensor. longitude (`Longitude`) Longitude coordinate of this channel’s sensor. elevation (float) Elevation of the sensor. depth (float) The local depth or overburden of the instrument’s location. For downhole instruments, the depth of the instrument under the surface ground level. For underground vaults, the distance from the instrument to the local ground level above. azimuth (float) Azimuth of the sensor in degrees from North, clockwise. dip (float) Dip of the instrument in degrees, down from horizontal. types (list of str) The type of data this channel collects. Corresponds to channel flags in SEED blockette 52. The SEED volume producer could use the first letter of an Output value as the SEED channel flag. Possible values: TRIGGERED, CONTINUOUS, HEALTH, GEOPHYSICAL, WEATHER, FLAG, SYNTHESIZED, INPUT, EXPERIMENTAL, MAINTENANCE, BEAM external_references (list of `ExternalReference`) URI of any type of external report, such as data quality reports. sample_rate (float) This is a group of elements that represent sample rate. If this group is included, then SampleRate, which is the sample rate in samples per second, is required. SampleRateRatio, which is expressed as a ratio of number of samples in a number of seconds, is optional. If both are included, SampleRate should be considered more definitive. sample_rate_ratio_number_samples (int) The sample rate expressed as number of samples in a number of seconds. This is the number of samples. sample_rate_ratio_number_seconds (int) The sample rate expressed as number of samples in a number of seconds. This is the number of seconds. storage_format (str) The storage format of the recorded data (e.g. SEED) clock_drift_in_seconds_per_sample (float) A tolerance value, measured in seconds per sample, used as a threshold for time error detection in data from the channel. calibration_units (str) Name of units , e.g. “M/S”, “M”, ... calibration_units_description (str) Description of units, e.g. “Velocity in meters per second”, ... sensor (`Equipment`) The sensor pre_amplifier (`Equipment`) The pre-amplifier data_logger (`Equipment`) The data-logger equipment (`Equipment`) Other station equipment response (`Response`) The response of the channel description (str) A description of the resource comments (list of `Comment`) An arbitrary number of comments to the resource start_date (`UTCDateTime`) The start date of the resource end_date (`UTCDateTime`) The end date of the resource restricted_status (str) The restriction status alternate_code (str) A code used for display or association, alternate to the SEED-compliant code. historical_code (str) A previously used code if different from the current code. data_availability (`DataAvailability`) Information about time series availability for the channel.

### 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)