[daip] Smearing calculation in JMFIT

[Vinodiran Arumugam]

Hi,

I'm exploring the smearing correction applied to my data to correct for 
the reduction in peak fluxes. It would help if I could understand how 
JMFIT varies the half peak beam width (hpbw) used in the smearing equation 
(fractional bandwidth x radius in hpbw) across the map.

So for an elliptical beam of bmaj = 1.82, bmin = 1.63 and bpa = -3deg, how 
is the hpbw varied to use 1.82 at the nothern/southern most point and 1.63 
at the eastern/western most point? What function of position and 
major/minor axis is used to calculate the bandwidth smearing?

Thank you,
Vinod