[Gb-ccb] CCB first light

Tim Pearson tjp at astro.caltech.edu
Thu Nov 10 11:59:18 EST 2005


Well done everyone!

Tim

On Nov 9, 2005, at 7:13 PM, Brian Mason wrote:

>
> hi all- we had some software test time tonight and at the end I got  
> in a quick peak scan with the GBT+CCB! First light screenshot from  
> the CLEO real-time display is attached, warts and all. The plot is  
> a time series as we scan across the source in azimuth (then back  
> again), then ditto in elevation. The quantity plotted is switched  
> power and we are looking at the "negative" beam. The fuzz at the  
> start of the first source crossing is because I had forgotten to  
> enable CCB control of the beam switching signals in the Ka receiver  
> (so the receiver wasn't actually switching though CCB thought it  
> was) and then fixed it. The weather was poor -- heavy clouds and  
> occasional light rain. The source was 2253+1608 (~5 Jy @ 30 GHz).
>
> We still have a fair list of things to sort out and analysis to do  
> to determine how close we've come to our goals, but this is a big  
> milestone-- congrats (again) to all!
>
>   Brian



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