RFI

Radio Frequency Interference (RFI) at LWA1:  Yeah, we have some of that.  But, the RFI situation is surprisingly good – many observations are possible with no RFI mitigation or just simple time-frequency editing, as demonstrated in these resultsRule 1:  Night is much better than day.  For long integrations at certain frequencies and times-of-day, a little extra RFI mitigation kung-fu may be required.  Rule 2:  Be especially careful about observing in the NTSC and ATSC (TV) channels between 54 and 88 MHz, where we receive intermittent reflections from meteor trails and other things in the sky.

LWA Memo 183 has some details about the RFI spectrum.

Here’s some eye candy that shows how good the LWA1 site can be:

Active dipole output spectrum

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