[mmaimcal] Correlator question

[Bill Dent]

It's worse if you want cross polarisation products as well - only 
0.1km/s channel spacing at 3mm. that's barely the thermal linewidth...

On 05/17/2010 04:51 PM, Al Wootten wrote:
> Folks,
>
> There have been some difficulties establishing the 31.25 MHz 
> correlator mode, which provides highest resolution.  As you know, 62.5 
> MHz works fine at the moment.  At 86 GHz, this provides 15.2587891 
> kHz/0.053 km/s resolution (attached example of mode 12/Ori SiO 
> maser--the cause of the incorrect frequency problem is well-known; the 
> casa plot labeling awkwardness may be known).  I think that the 
> priority of getting the higher res mode going is not so high as 
> getting other aspects working, e.g. multi-resolution multi-window 
> modes and that effort on it might be postponed.  Mode 6 offers twice 
> the resolution (at the cost of one polzn) but is not on the no 1 
> priority list from the ASAC.
>
> ASAC said:
> "C. Mode 12. Two polarizations in a bandwidth of 62.5 MHz and 4096 
> channels, the highest spectral resolution available (0.02 km/s at 230 
> GHz over a bandwidth of 82 km/s). This will satisfy even the most 
> detailed requirements for high spectral resolution."
>
> What do you all think?
>
> Clear skies,
> Al
>
>
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