[daip] Re: SNFLG gripe

[Eric Greisen]

Lincoln Greenhill writes:
 > 
 > Hi Eric,
 > 
 > I have discovered a behavior of SNFLG I cannot explain.
 > [I am using 31DEC03 on a RH9.0 LINUX machine.  (2.95.3 g77).]
 > 
 > My SN table interval is 45s.
 > 
 > I run SNFLG with DPARM=90,40 -> FG2
 > I run SNFLG with DPARM=170,40 -> FG3.
 > 
 > I observe that FG3 includes comments in the REASON field about the
 > flagging of phase jumps that are << 170 degrees. The two flag tables have
 > about the same number of entries.  And when I run SPLIT the data, applying
 > the new FG table [but no other table (e.g., docal=-1)], I obtain the same 
 > number of visibilities output whether I use FG2 or FG3.  
 > 
 > I have placed a FITS uv-file on 
 > cfa-www.harvard.edu/~lincoln/GREISEN.TEST.FITS.gz
 > in the event you can look into this.  When you have downloaded it, please 
 > let me know so that I can delete it.
 > 
 > I run SNFLG on SN3.   FLAGVER and DPARM are as above.  DOIF<>1
 > DOSTOKES<>1, but the SN table has the same entries for each IF
 > and polarization channel.  All other SNFLG entries are defaults.  
 >