Space Weather-Induced Broadening of Narrowband Signals: Implications for SETI Searches
To the point
SETI researcher Grayce C. Brown, with Vishal Gajjar, says space weather from solar activity can smear and weaken narrowband radio signals as they travel toward Earth, so analysts study Pioneer, Helios, Viking, and Mariner data at different Sun distances to predict how a real distant signal would look and improve searches (even around red dwarf stars).
