[evlatests] 17 Nov. sick data / Nov. 15 good data.

Bryan Butler bbutler at nrao.edu
Mon Nov 19 17:07:21 EST 2007


FWIW, this change has been in place since october 24 :|...


Bryan Butler wrote:
> it's supposed to round them both to even Hz.  i think i incurred a bug 
> when fixing it for continuum L-band.  i'll have a look.
> 
> 	-bryan
> 
> 
> Vivek Dhawan wrote:
>> L band, BW= 0.78 MHz, corr mode 2AC, same file
>> run on both days but Doppler velocity settings
>> were different on the 2 days, i.e. several freq.
>> settings were used.
>>
>> In all cases, the pattern is that when the Fluke
>> setting in the observe file ends in an odd number
>> of Hz, the EVLA and VLA are mutually incoherent
>> (fringes within each array are OK). Fluke AC set
>> to even Hz always makes the 2 arrays coherent.
>>
>> I checked the scripts for the 2 days at:
>>
>> /home/mchost/evla/scripts/astronomy/2007/11/140AV297-000.evla
>> /home/mchost/evla/scripts/astronomy/2007/11/142AV297-000.evla
>>
>> The frequency in the scripts is identical to that in the
>> .obs file. Is obs2script supposed to round the frequencies
>> to even Hz on both AC and BD or just BD?  in this case
>> neither appears to be rounded - but an expert should look
>> at this, as I may not be reading the script correctly.
>>
>> V.
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