[evlatests] New L-band RFI?

[Vivek Dhawan]

left out the URL

http://www.vla.nrao.edu/astro/rfi/w8mon/plots/lband/SAHP_1500_20150303.pdf

On 03/05/2015 01:02 PM, Vivek Dhawan wrote:
> It is neatly caught by Mert's new W8 monitor which has been online since late
> February.
>
> This appears to be a daily phenomenon, a burst around 11am and another at 3pm.
> No bursts on March 1 and a couple days before. Even earlier, there are one or
> 2 bursts, usually in daytime. Maybe a new pest got tested and deployed?
>
>
> On 03/05/2015 09:56 AM, Rick Perley wrote:
>>      I have long been using 1820/128 MHz as a 'safe' L-band SPW for testing.  It
>> has always been clean of RFI.  But not yesterday. During a late afternoon test
>> of the OTF modes, this SPW was completely wiped out by a pair of RFI tones, at:
>>
>>      1804.0 and 1830.0 MHz.
>>
>>      These were seen equally on all baselines and both polarizations. They were
>> strong enough to completely trash the switched power calibration.  All
>> autocorrelations were blanked out for that SPW. They don't look to me like an
>> external signal ... but this is a purely subjective opinion.
>>
>>      The other SPW (1445 MHz) was fine.
>>
>>
>>
>>
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