[evlatests] Modcomp-free: L-Band

[Rick Perley]

    QUACK (I believe the CASA types are going to call their version of 
this 'HONK')  is indeed a useful program, and needs to live as long as 
our initial flagging is less than perfect.  (I think this statement was 
made in 1977, when QUACK first appeared -- note that is still exists ...). 
    Can we not define the beginning of a scan as the time when the 
antennas arrive on source, according to some flag level that we can 
adjust?  Then, if we flag data at the highest level (if such levels are 
available) while antennas are in motion, we could arrange for start 
times of scans to occur much as the Modcomps do it now. 


Barry Clark wrote:
> Having idcaf write data all the time was a conscious decision, but it
> hadn't occurred to me until just now that means that 'quack' won't work.
> can we do without that useful program?
>
>
>   
>> From evlatests-bounces at donar.cv.nrao.edu  Thu Jun 14 20:44:36 2007
>> Date: Thu, 14 Jun 2007 20:44:19 -0600 (MDT)
>> From: Ken Sowinski <ksowinsk at nrao.edu>
>>
>> On Thu, 14 Jun 2007, Rick Perley wrote:
>>
>>     
>>>    1) The first 1.25 minutes of the scan were all noise -- evidently
>>> the correlator was outputting data even though the antennas were slewing
>>> from the previous source (3c147 at P-band ) to the L-band source
>>> (3C84).  I thought the correlator was supposed to be turned off when the
>>> antennas were slewing ...
>>>       
>> Data is not surpressed while the antennas are slewing, but it
>> should be flagged.  It would be interesting to look at that
>> because we have seen curiosities in flags today while antennas
>> were slewing.
>>
>> I don't know that doing this was a conscious decision.  If it
>> is deemed desireable idcaf could probably be taught to do it.
>>
>>     
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