[daip] UVCON: pointing error
Leonia Kogan
lkogan at nrao.edu
Mon Feb 7 18:20:01 EST 2011
1. I may make a mistake at the previous message: BMAJ, BMIN are used
only if BPARM(6) = 4.
But you used BPARM(6)=1 => circular dish (diameter is given at INFILE)
with flat ilimination. The GMRT antenna hs diameter=45m, so the primary
beam a t freq=o.33GHz is bigger than 1 degrees (=1m/45*57).
So my concern at the previous messge may be still correct: 1argmin<<1deg
LK
Leonia Kogan wrote:
> Hi Subhashis
>
> You have the pointing error rms = BPARM(3)+BPARM(5) ~61 arcsec
> =~1 arcmin. The primary beam width ~1.5 degrees is much bigger.
> So the effect of the pointing error may be negligible
>
> LK
>
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