Message boards :
Nebula :
Drifting (on a sea of...)
Message board moderation
Author | Message |
---|---|
David Anderson Send message Joined: 13 Feb 99 Posts: 173 Credit: 502,653 RAC: 0 |
We've been working almost entirely on refining the drifting RFI algorithm. This - I hope - is the last big piece before we do our final Nebula run and finish the paper.
Recall that the drifting algorithm takes a "vertex" detection D and forms two fans of triangles in time/frequency space, emanating from D in the positive and negative time directions. We count the number of detections in each triangle that are "far" from D (a couple of beam widths or more) and compute a probability for each triangle; the more detections in the triangle, the lower the probability.
With these changes, the algorithm is working pretty well. It removes only 2.9% of birdie spikes and 11.8% of all spikes, it removes the obvious examples, and few of the top multiplets are RFI. So maybe we're done with drifting.
|
ML1 Send message Joined: 25 Nov 01 Posts: 21101 Credit: 7,508,002 RAC: 20 |
Good going and thanks for the good details. ... Other news: we're talking with astronomers at FAST about using Nebula as part of SETI sky survey there. Needless to say, that would be very exciting! Yay! Good luck!! Keep searchin', Martin See new freedom: Mageia Linux Take a look for yourself: Linux Format The Future is what We all make IT (GPLv3) |
©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.