Metadata

This library currently supports one type of strainmeter, the Gladwin Tensor Strainmeter (GTSM). We have implemented a class and methods to load and store the metadata associated with these instruments.

earthscopestraintools.gtsm_metadata.GtsmMetadata

Class for loading and storing GTSM processing metadata for a given station. Metadata sources include a summary table containing basic information about all stations and individual pages with station specific processing parameters such as pressure response coefficients, tidal constituents, and calibration matricies.

A station metadata object will contain the following attributes:

Attributes
network	(str) FDSN network code
station	(str) FDSN station code
latitude	(float) station latitude
longitude	(float) station longitude
elevation	(float) station elevation in meters
gap	(float), instrument gap in meters
diameter	(float), instrument sensing diameter in meters
start_date	(str), formatted as “%Y-%m-%d”
orientation	(float), degrees East of North for CH0
reference_strains	(dict), containing ‘linear_date’:’YYYY:DOY’ and each channel ie ‘CH0’:reference counts
strain_matrices	(dict), contains one or more calibration matrices, keyed to the name of the calibration.
atmp_response	(dict), reponse coefficients for each channel
tidal_params	(dict), keys are tuple of (channel, tidal constituent, phz/amp/doodson)

Example usage:

from earthscopestraintools.gtsm_metadata import GtsmMetadata
meta = GtsmMetadata(network='PB',station='B004')
meta.show()

network: PB
station: B004
latitude: 48.20193
longitude: -124.42701
gap: 0.0002
orientation (CH0EofN): 168.2
reference_strains:
 {'linear_date': '2005:180', 'CH0': 48391551, 'CH1': 49872537, 'CH2': 49840454, 'CH3': 49541470}
strain_matrices:
lab:
 [[ 0.2967  0.5185  0.2958  0.2222]
 [-0.2887  0.2983  0.1688 -0.1784]
 [-0.266  -0.2196  0.3531  0.1325]]
ER2010:
 [[ 1.65662916  2.37718929  2.36230912  0.39952254]
 [-0.04469343  0.51274012  0.50047667 -0.09672701]
 [ 0.39438025  1.05488877  1.64758286  0.22625875]]
CH_prelim:
 None
atmp_response:
 {'CH0': -0.004200000000000001, 'CH1': -0.0036000000000000003, 'CH2': -0.0046, 'CH3': -0.0040999999999999995}
tidal_params:
 {('CH0', 'M2', 'phz'): '114.965', ('CH0', 'M2', 'amp'): '9.590', ('CH0', 'M2', 'doodson'): '2 0 0 0 0 0', ...