Message boards :
Nebula :
RFI Explorer
Message board moderation
Author | Message |
---|---|
David Anderson Send message Joined: 13 Feb 99 Posts: 173 Credit: 502,653 RAC: 0 |
I added a feature that lets you compare and experiment with RFI removal algorithms. First, drill down to a waterfall plot. A typical one is here. You can see that there's drifting RFI. At the bottom of the page, there's a form that lets you choose RFI algorithms and their parameters. Click OK at the bottom. You'll see that the RFI has been removed. Uncheck the "Drifting" checkbox and click OK again. The RFI is back. You can experiment with the parameters of the drifting algorithm and see what works best (the default parameters seem to work pretty well). This interface, in addition to being informative, will greatly accelerate the process of evaluating new RFI removal algorithms. |
wulf 21 Send message Joined: 18 Apr 09 Posts: 93 Credit: 26,337,213 RAC: 43 |
Thanks for the update. Going to try that out... |
wulf 21 Send message Joined: 18 Apr 09 Posts: 93 Credit: 26,337,213 RAC: 43 |
After some experimentation it looks like the default settings remove several spikes that don't seem to have a direct connection to the RFI. (frequency higher and lower than the obvious RFI in the middle) I tried tuning down the drifting RFI-detection parameters as low as possible, however this might only fit this specific and obvious RFI example ;-). Things that surprised me most:
|
©2024 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.