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: http://www.atnf.csiro.au/computing/software/asap/cookbook/node42.html
Дата изменения: Unknown Дата индексирования: Tue Feb 5 06:34:15 2013 Кодировка: |
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