fieldinterp.py

class IFieldInterp

Bases: ABC

Interface (abstract base class) for allowing different methods of field interpolation. Nominally this includes mesh-based and mesh-free interpolation methods.

abstractmethod interp_field(points, sample_times=None)

Invokes the field interpolation algorithm at the given points and sample times. Spatial interpolation is performed first at existing data time steps. If the sample times are the same as the underlying data no temporal interpolation is performed otherwise linear interpolation is performed between time steps for each point in space.

Parameters:

• points (np.ndarray) – Array of points to spatially interpolate the physical field to.

• sample_times (np.ndarray | None, optional) – Vector of times at which to sample the underlying physical field, by default None. If this is None then no temporal interpolation is performed and the points returned correspond to the input simulation time steps.

Returns:

np.ndarray – Simulated measurement array intepolated from the simulation data to the desired sensor locations and sample times with shape=( num_sensors,num_field_components,num_sample_times).

interp_to_sample_time(sample_at_sim_time, sim_time_steps, sample_times)

Helper function for linear temporal interpolation of simulation data. Assumes the input data has already been interpolated to the desired spatial locations and then performs temporal interpolation linearly based o the specified sample times.

Parameters:

• sample_at_sim_time (np.ndarray) – Array of simulated measurement points that have been spatially interpolated to the desired location. Has the same shape as standard measurement array, shape=(num_sensors,num_field_components, num_sim_time_steps)

• sim_time_steps (np.ndarray) – Vector of simulation time steps which should have the same length as the last axis of the sample_at_sim_time array above.

• sample_times (np.ndarray) – Vector of times at which to sample by linearly interpolating between simulation time steps.

Returns:

np.ndarray – Simulated measurement array with shape=(num_sensors,num_field_components ,num_sample_times)