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StarWatch 2.0: RFI filter for SETI signals

: Klimenko, S.; Nikitin, I.; Nikitina, L.; Konich, K.; Reinartz, K.; Tyul'Bashev, S.


Sourin, Alexei (Ed.):
International Conference on Cyberworlds, CW 2016. Proceedings : 28-30 September 2016, Chongqing, China
Los Alamitos, Calif.: IEEE Computer Society Conference Publishing Services (CPS), 2016
ISBN: 978-1-5090-2303-5
International Conference on Cyberworlds (CW) <2016, Chongqing>
Fraunhofer SCAI ()

We extend our system for radio astronomical monitoring by a cross-validation filter, separating near Earth radio frequency interference (RFI) from deep space signals. The filter searches for similar signals in a nearby frequency band, coming from a different spatial direction than the tested signal. The filter passes the signals which do not have such duplicates. We apply this technique to a database of SETI Institute (, containing 1.5 millions of sky observations in a frequency range 0.5-11.2~GHz, where our primary selection identified 28 strong signals possessing extraterrestrial (ET) signature. Cross-validation allows to filter out 24 of those signals as satellite RFI. We present parameters for the remaining 4 signals and discuss statistical significance of these findings.