Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mala.iafcr....b&link_type=abstract
IAF, International Astronautical Congress, 40th, Malaga, Spain, Oct. 7-13, 1989. 8 p.
Astronomy and Astrophysics
Astronomy
Extraterrestrial Intelligence, Microwaves, Milky Way Galaxy, Project Seti, Radar Detection, Signal Detection, Electromagnetic Radiation, Sky Surveys (Astronomy)
Scientific paper
The maximum range is calculated at which radar signals from the earth could be detected by a search system similar to the NASA SETI Microwave Observing Project (SETI MOP) assumed to be operating out in the Galaxy. Figures are calculated for the Targeted Search and for the Sky Survey parts of the MOP, both planned to be operating in the 1990s. The probability of detection is calculated for the two most powerful transmitters, the planetary radar at Arecibo (Puerto Rico) and the ballistic missile early warning systems (BMEWSs), assuming that the terrestrial radars are only in the eavesdropping mode. It was found that, for the case of a single transmitter within the maximum range, the highest probability is for the sky survey detecting BMEWSs; this is directly proportional to BMEWS sky coverage and is therefore 0.25.
Billingham John
Tarter Jill
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