International Journal of Astrobiology

Calculating the probability of detecting radio signals from alien civilizations

Marko Horvat a1
a1 Faculty of Electrical Engineering and Computing, University of Zagreb Unska 3, HR-10000 Zagreb, Croatia e-mail:

Article author query
horvat m   [PubMed][Google Scholar] 


Although it might not be self-evident, it is in fact entirely possible to calculate the probability of detecting alien radio signals by understanding what types of extraterrestrial radio emissions can be expected and what properties these emissions can have. Using the Drake equation as the obvious starting point, and logically identifying and enumerating constraints of interstellar radio communications, may yield the possibility of detecting a genuine alien radio signal.

(Received June 18 2006)
(Accepted July 13 2006)
(Published Online September 7 2006)

Key Words: cosmology; Drake equation; extraterrestrial communication; extraterrestrial intelligence; extraterrestrial life; extraterrestrial radio waves; interstellar communication; SETI.