[evla-sw-discuss] Reference pointing

[Bryan Butler]

good stuff.  thanks barry.

another way, not requiring a

refpt = None

up top is to just make the first call be like the old way, then 
subsequent calls the new way.  whatever is easier for dave & brian in 
model2script...

	-bryan


Barry Clark wrote, On 2/24/10 14:24:
> I made a small change to the include file pointing.py to facilitate
> usage of the feature of using previous pointing solutions if the
> current one fails.  I have added an optional parameter.
> 
> Current reference pointing has a call like
> 
> refpt = vlaPointing(tmjd( 8, 30, 20, 0), tmjd( 8, 42,  0, 0), 10.000000, 
> 2, [])
> 
> which will still work as before.
> 
> To use the "use last solution" feature, somewhere near the beginning of
> the script, put
> 
> refpt = None
> 
> then the calls to vlaPointing become something like
> 
> refpt = vlaPointing(tmjd( 8, 30, 20, 0), tmjd( 8, 42,  0, 0), 10.000000, 
> 2, [], refpt)
> 
> 
> While I was mucking with the file, I put in a second modification, again
> an optional parameter, for use with multiple, software controlled,
> subarrays.
> 
> After one creates another Subarray, say subarray2, and moves antennas
> into it from the default subarray, one can do pointing in subarray2
> with a call
> 
> refpt = vlaPointing(tmjd( 8, 30, 20, 0), tmjd( 8, 42,  0, 0), 10.000000, 
> 2, [],,subarray2)
> 
> This is a particularly unsatisfactory, though easy, implementation,
> because while a pointing scan is running in one subarray, the others
> cannot change sources.
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