Create and plot generic ‘spectrograms’ for space science. This is not a signal processing routine and does not apply Fourier transforms (or similar) to the data. The functionality provided here is the binning (and averaging) of multi-dimensional to provide a 2D output map of some quantity as a function of two parameters. An example would be particle data from a satellite mission: electron flux, at a given energy, can be binned as a function of both time and McIlwain L, then plotted as a 2D color-map, colloquially known as a spectrogram.
In many other settings ‘spectrogram’ refers to a transform of data
from the time domain to the frequency domain, and the subsequent plotting
of some quantity (e.g., power spectral density) as a function of time and
frequency. To approximate this functionality for, e.g., time-series magnetic field
data you would first calculate a the power spectral density and then use
Spectrogram to rebin the data for visualization.
Copyright 2011 Los Alamos National Security, LLC.
This class rebins data to produce a 2D data map that can be plotted as a spectrogram
Plot a spectrogram given Z or X,Y,Z.