This module contains a number of variables that readgssi needs to perform physics calculations and interpret radar information from DZT files.
c = 299792458 - celerity of electromagnetic waves in a vacuum
Eps_0 = 8.8541878 * 10**(-12) - epsilon naught, the vacuum permittivity
Mu_0 = 1.257 * 10**(-6) - mu naught, the vacuum permeability
MINHEADSIZE = 1024 - minimum DZT file header size in bytes
PAREASIZE = 128 - DZT file fixed info area size in bytes