Implements Heyer & Brunt PCA to measure turbulent structure function in clouds.
See Heyer & Schloerb (1997), Heyer & Brunt (2004), Brunt & Heyer (2013)
Requires astropy and spectral_cube as well as numpy.
Current non-installable.
Quick start:
import cloudpca
size,linewidth = cloudpca.structure_function('my_3d_image_cube.fits')