[daip] task fring

[egreisen]

On 2021-04-28 09:06, Hongmin wrote:
> Hi Eric,
> 
> If no source model is provided, a default point model at the phase
> center will be used. But what is the flux density of this default
> model (?)
> If fring is run before apcal, what is the flux density of this point
> model used by default (?)
> 
> If a source model is provided by get2name 'xxx.fits'; in this case, if
> the su table contains the flux density of the source, the model flux
> density will be scaled to this value. Whether it will have some
> influence on the results of fringe fitting if the visibility
> amplitudes of the source are not well calibrated (?)
> 

The amplitudes are not used whatsoever.  FRING finds the model's phase
and compares that to the data phases.  No need to worry about amplitude
calibration.

Eric Greisen


> Best,
>  Hongmin
> 
> -------------------------
> 
> Hongmin Cao
> ----------School of Electronic and Electrical Engineering,
> Shangqiu Normal University,　
> 
> Wenhua Road 298, Shangqiu, Henan, China
> Website: http://www.sqnu.edu.cn
> My mobile: +86-15139707583
> My emails: hongmin.cao at foxmail.com;
> hmcao at outlook.com; chmcao at gmail.com