Unit Conversion

To convert measurements in Kelvin to Jy (and vice versa) the global function convert_flux is needed. This converts and scales the data from K to Jy or vice-versa depending on what the current brightness unit is set to. The function knows the basic parameters for some frequencies and telescopes, but the user may need to supply the aperture efficiency, telescope diameter or the Jy/K factor.

  ASAP>scans.convert_flux()               # If efficency known
  ASAP>scans.convert_flux(eta=0.48)       # If telescope diameter known
  ASAP>scans.convert_flux(eta=0.48,d=35)  # Unknown telescope
  ASAP>scans.convert_flux(jypk=15)        # Alternative