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Space missions for SETI.

F Drake1

  • 1SETI Institute, Mountain View, California, USA.

Acta Astronautica
|September 7, 2001
PubMed
Summary
This summary is machine-generated.

Designing economical radio telescopes for the Search for Extraterrestrial Intelligence (SETI) is feasible. Optimal locations include geosynchronous orbit or the far side of the Moon, avoiding Earth

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Area of Science:

  • Astronomy and Astrophysics
  • Search for Extraterrestrial Intelligence (SETI)

Background:

  • SETI radio telescope requirements are less stringent than general astronomical observatories.
  • Earth-based radio interference poses significant challenges for SETI observations.

Purpose of the Study:

  • To evaluate various locations and designs for economical radio telescopes for SETI.
  • To assess the feasibility of different telescope configurations and their potential for detecting extraterrestrial signals.

Main Methods:

  • Analysis of radio telescope performance in different orbital and spatial locations (LEO, GEO, Lunar far-side, Solar gravitational lens).
  • Consideration of engineering and cost factors for large-scale radio telescope construction.
  • Evaluation of signal detection capabilities based on telescope size and configuration.

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Main Results:

  • Low Earth Orbit (LEO) is disadvantageous for SETI; geosynchronous orbit and the Lunar far-side offer significant advantages.
  • Large single-reflector telescopes (up to 50 km) are constructible but likely cost-prohibitive.
  • A solar gravitational lens system with free-flying telescopes offers immense collecting area and detection capabilities.

Conclusions:

  • Geosynchronous and Lunar far-side locations are promising for radio interference mitigation in SETI.
  • The solar gravitational lens concept presents a potentially revolutionary approach for future SETI endeavors.
  • Economical design strategies are crucial for advancing SETI capabilities.