[daip] how to find the integration time

[Kristy Dyer]

Actually DTSUM doesn't work for (my) VLA data. The nice lines with the 
integration time don't show up at all.

Would it be possible to re-write LISTR SCAN to print out the integration time?

The reason I ask is that a) I need this information in order to make sure I'm 
calibrating over several time samples, and b) the only place I know to get the 
information is in the old VLA archive report, which some day is going to go 
away (so I don't want to tell the students in the data tutorial on Monday to use 
it).

I tried using uvprt and got the following:

 lark      UVPRT(31DEC04)     13     17-JUN-2004  13:54:17    Page    1
File = A13_P_BnA   .CH.0  .   3   Vol = 1    Userid =   13     Channel =    1     
IF =  1
Ref freq=  0.327499991 GHz  Ncor=  2  No. vis=    453125  Sort order= TB
U, V, W are in Kilo wavelengths at the selected frequency
Weights have been multiplied by      0.0010

Source 0137+331 (    0)  RA   =  01 37 41.30  DEC  =  33 09 35.1
Source= 0137+331    Freq=   0.327499991    Sort= TB        1   RR             1   
LL
    Time       Ant    U(Kilo )   V(Kilo )   W(Kilo )   Amp  Phas  Wt      Amp  
Phas  Wt

 0/04:18:06.7  1- 2       8.14      19.17       2.18   0.714 -21 15.506   0.777  
63 15.506
 0/04:18:13.3  1- 2       8.13      19.18       2.17   0.707 -21 15.833   0.772  
63 15.833
 0/04:18:20.0  1- 2       8.13      19.18       2.17   0.726 -21 16.280   0.799  
64 16.280
 0/04:18:40.0  1- 2       8.12      19.18       2.16   0.696 -15 16.585   0.786  
68 16.585
 0/04:18:46.7  1- 2       8.12      19.18       2.16   0.699 -14 16.294   0.758  
70 16.294
 0/04:18:53.3  1- 2       8.11      19.19       2.15   0.706 -13 16.260   0.783  
71 16.260
 0/04:19:00.0  1- 2       8.11      19.19       2.15   0.698 -12 16.519   0.772  
72 16.519
 0/04:19:06.7  1- 2

So the times are:

13.3-6.7=6.6 sec
20.0-13.3=7 sec
40-20=20 sec
53.3-46.7=6.6

I'm not sure why this isn't consistant.

Leonia also pointed out that the integration time can change from source to source 
-- it would be nice to know if that happened.

-- Kristy


On Thu, Jun 17, 2004 at 08:16:28AM -0600, Leonia Kogan wrote:
>>Is there an AIPS task that will report the integration time for my 
>>visibilities?
>
>You can try the task 'dtsum'
>
>Leonia
>
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>Is there an AIPS task that will report the integration time for my 
>visibilities?
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>-- Kristy
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