[evlatests] New L-band RFI?

[Dan Mertely]

We've noticed it too on the (newly resurrected) W8 monitor
(http://www.vla.nrao.edu/cgi-bin/rfi.cgi). It seems to only
occur during the daylight hours for  1-1.5 hours, once or
twice per day, but not on weekends.  It looks like it could
be aircraft test telemetry.  I could check with the local
spectrum coordinator at WSMR if you'd like. -Mert

On 3/5/2015 9:56 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.
>
>
>
>
> _______________________________________________
> evlatests mailing list
> evlatests at listmgr.nrao.edu
> https://listmgr.nrao.edu/mailman/listinfo/evlatests