Drifting RFI: one more round

Message boards : Nebula : Drifting RFI: one more round
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Profile David Anderson
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Message 1883948 - Posted: 15 Aug 2017, 1:37:58 UTC

There was a problem with the drifting RFI algorithm. In periods of fast telescope movement it would look at a short time window, like 30 sec. This wasn't enough to find certain obvious RFI - I bookmarked an example.

I changed it to use a time window of 600 sec in all cases. This runs slower, since it looks at way more signals, but it correctly removes all the examples we've identified so far.

If you want to help, please browse the results, try to find remaining drifting RFI, bookmark it, and tell me about it.

The top candidate list contains some multiplets consisting of a few very powerful (> 6000) spikes. It's not clear what these are; we're going to discuss this at our weekly meeting this Wednesday.

-- David
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Profile Jon Golding

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Message 1883990 - Posted: 15 Aug 2017, 8:50:11 UTC - in response to Message 1883948.  

Great news that the data analysis is nearly complete.
Do these multiplets with large numbers of spikes all come from the same region of the sky and are they reproducible over several observing sessions, or is this more likely to be a single burst of noise (radar?)
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Message boards : Nebula : Drifting RFI: one more round

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