Page 1 of 1

some channels flagged after applying bandpass

Posted: Wed Oct 30, 2013 4:44 pm
by xiaohui
I'm processing my CABB 16cm data.

After I copy the bandpass solution to the program source and run PGFLAG, I realise some channels have been flagged. Is this because there is no bandpass solution towards those channels?

Thanks!
Xiaohui

Re: some channels flagged after applying bandpass

Posted: Thu Oct 31, 2013 9:32 am
by ste616
Hi Xiaohui,

You are correct. If a channel is flagged for all visibilities on the bandpass calibrator, then a bandpass solution will not be produced for that channel, and no dataset using that bandpass solution will be able to use that channel.

You can get around this though by using options=interpolate in mfcal. This will try to determine - via a spline fit - a bandpass value for those channels with no good data.

Re: some channels flagged after applying bandpass

Posted: Thu Oct 31, 2013 10:28 am
by xiaohui
Many thanks, Jamie!