some channels flagged after applying bandpass

Got a calibration problem? Discuss it here.

Moderator: Mark.Wieringa

Post Reply
xiaohui
Posts: 4
Joined: Wed Oct 30, 2013 4:30 pm

some channels flagged after applying bandpass

Post 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
ste616
Site Admin
Posts: 220
Joined: Thu Feb 04, 2010 3:27 pm
Location: Paul Wild Observatory Narrabri NSW

Re: some channels flagged after applying bandpass

Post 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.
cheers
Jamie Stevens
ATCA Senior System Scientist
xiaohui
Posts: 4
Joined: Wed Oct 30, 2013 4:30 pm

Re: some channels flagged after applying bandpass

Post by xiaohui »

Many thanks, Jamie!
Post Reply