simpeg.electromagnetics.time_domain.sources.VTEMWaveform#

class simpeg.electromagnetics.time_domain.sources.VTEMWaveform(off_time=0.0042, peak_time=0.00273, ramp_on_rate=3.0, **kwargs)[source]#

Bases: BaseWaveform

A VTEM style waveform

Parameters:

off_timefloat, default: 4.2e-3: time at which the transmitter is turned off in units of seconds
peak_timefloat, default: 2.73e-3: the peak time for the waveform
ramp_on_ratefloat, default: 3.0: parameter controlling how quickly the waveform ramps on

Attributes

`epsilon`	Window of time within which the waveform is considered on
`has_initial_fields`	Whether the waveform has initial fields.
`off_time`	Off-time
`peak_time`	Peak time
`ramp_on_rate`	Ramp on rate

time_nodes

Methods

`eval`(time)	Evaluate current waveform at a given time
`eval_deriv`(time)	Evaluate the time derivative of the linear ramp-off waveform at given times

Examples

>>> import matplotlib.pyplot as plt
>>> import numpy as np
>>> from simpeg.electromagnetics import time_domain as tdem

>>> times = np.linspace(0, 1e-2, 1000)
>>> waveform = tdem.sources.VTEMWaveform()
>>> plt.plot(times, [waveform.eval(t) for t in times])
>>> plt.show()