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obspy.clients.nrl - Nominal Response Library client for ObsPy

This module contains a client to access the Nominal Response Library (NRL) hosted by IRIS (http://ds.iris.edu/NRL/).

copyright:The ObsPy Development Team (devs@obspy.org)
license:GNU Lesser General Public License, Version 3 (https://www.gnu.org/copyleft/lesser.html)

Basic Usage

The first step is to initialize a NRL client object. A client object can be initialized either with the base URL of a NRL hosted on a web server or with a local directory path to a downloaded and unpacked NRL zip file. The default is to access the always up-to-date NRL database hosted at IRIS.

>>> from obspy.clients.nrl import NRL
>>> nrl = NRL()

The sensor and datalogger tree structure can be interactively explored in an interactive Python shell:

>>> print(nrl) 
NRL library at http://ds.iris.edu/NRL/
  Sensors: 24 manufacturers
    'CEA-DASE', 'CME', 'Chaparral Physics', 'Eentec', 'GEObit',
    'GEOsig', 'Generic', 'Geo Space/OYO', 'Geodevice', 'Geotech',
    'Guralp', 'Hyperion', 'IESE', 'Kinemetrics', 'LaHusen', 'Lennartz'
    'Metrozet', 'Nanometrics', 'REF TEK', 'Sercel/Mark Products',
    'Silicon Audio', 'SolGeo', 'Sprengnether (now Eentec)',
    'Streckeisen'
  Dataloggers: 15 manufacturers
    'Agecodagis', 'DAQ Systems (NetDAS)', 'Earth Data', 'Eentec',
    'Generic', 'GeoBIT', 'Geodevice', 'Geotech', 'Guralp',
    'Kinemetrics', 'Nanometrics', 'Omnirecs', 'Quanterra', 'REF TEK',
    'SolGeo'
>>> print(nrl.sensors) 
Select the sensor manufacturer (24 items):
  'CEA-DASE', 'CME', 'Chaparral Physics', 'Eentec', 'GEObit', 'GEOsig'
  'Generic', 'Geo Space/OYO', 'Geodevice', 'Geotech', 'Guralp',
  'Hyperion', 'IESE', 'Kinemetrics', 'LaHusen', 'Lennartz', 'Metrozet'
  'Nanometrics', 'REF TEK', 'Sercel/Mark Products', 'Silicon Audio'
  'SolGeo', 'Sprengnether (now Eentec)', 'Streckeisen'
>>> print(nrl.sensors['Streckeisen']) 
Select the Streckeisen sensor model (5 items):
  'STS-1', 'STS-2', 'STS-2.5', 'STS-3', 'STS-5A'
>>> print(nrl.sensors['Streckeisen']['STS-1']) 
Select the corner period mode for this STS-1 (2 items):
  '20 seconds', '360 seconds'
>>> print(nrl.sensors['Streckeisen']['STS-1']['360 seconds']) 
(u'STS-1, 360 s mode, 2400 V/m/s',
 u'http://ds.iris.edu/NRL/sensors/streckeisen/RESP.XX.NS088..BHZ.STS1.360.2400')  # NOQA

Response objects can be extracted by providing the datalogger and sensor keys:

>>> response = nrl.get_response( 
...     sensor_keys=['Streckeisen', 'STS-1', '360 seconds'],
...     datalogger_keys=['REF TEK', 'RT 130 & 130-SMA', '1', '200'])
>>> print(response) 
Channel Response
    From M/S (Velocity in Meters per Second) to COUNTS (Digital Counts)
    Overall Sensitivity: 1.50991e+09 defined at 0.020 Hz
    10 stages:
        Stage 1: PolesZerosResponseStage from M/S to V, gain: 2400
        Stage 2: ResponseStage from V to V, gain: 1
        Stage 3: CoefficientsTypeResponseStage from V to COUNTS, gain: 629129
        Stage 4: CoefficientsTypeResponseStage from COUNTS to COUNTS, gain: 1
        Stage 5: CoefficientsTypeResponseStage from COUNTS to COUNTS, gain: 1
        Stage 6: CoefficientsTypeResponseStage from COUNTS to COUNTS, gain: 1
        Stage 7: CoefficientsTypeResponseStage from COUNTS to COUNTS, gain: 1
        Stage 8: CoefficientsTypeResponseStage from COUNTS to COUNTS, gain: 1
        Stage 9: CoefficientsTypeResponseStage from COUNTS to COUNTS, gain: 1
        Stage 10: CoefficientsTypeResponseStage from COUNTS to COUNTS, gain: 1

Classes & Functions

client.NRL NRL client base class for accessing the Nominal Response Library.

Modules

client Client for accessing the Nominal Response Library (http://ds.iris.edu/NRL/).

Scripts