[evlatests] 128 MHz RFI comb in Q-band ...

[Rob Long]

Are these comb lines only visible in correlated data, or can they be 
seen in raw bandpass plots?

Rob

Rick Perley wrote:
>     The last time a full spectra sweep was run (March of this year), I 
> found a remarkable set of comb-like interferors at the high end of Q-band. 
>     The recent sweep shows these are still present.  They have 
> interesting properties:
>    
>     1) They are visible only at the high end of Q-band.
>     2) They are at integer multiples of 128 MHz (starting at 379*128). 
>     3) They are present only on a few tens of baselines.  Antennas which 
> have by far the strongest birdies are:  14, 21, 11 and 22. 
>     4) These antennas are all near the center of the array (W3, E3, E1, 
> and N2, respectively).  However, other antennas in this vicinity show 
> very weak, or no, lines at all.  So I suggest we look first at these 
> four antennas for an origin. 
> 
> 
> _______________________________________________
> evlatests mailing list
> evlatests at listmgr.cv.nrao.edu
> http://listmgr.cv.nrao.edu/mailman/listinfo/evlatests