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Detectability of Extraterrestrial Technological Activities

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Author Topic: Detectability of Extraterrestrial Technological Activities  (Read 735 times)
Jennifer Murdoch
Superhero Member
Posts: 5235

« Reply #15 on: February 04, 2010, 01:22:37 pm »

 Radar is also the unique tool capable for making  a  survey  of such
       small objects at  all  angles  with respect to the central star.  It
       can also measure reflectivity and polarization to obtain physical
       characteristics and composition.

       For this case,  we  can assume that  each  of  the  extraterrestrial
       civilizations in the  galaxy  maintains  as good a  radar  planetoid
       and/or comet detection and analysis facility as is needed, either on
       the surface of  their  planet, in orbit, or on one of their possible

       The threshold for the Equivalent Isotropic  Radiated Power (EIRP) of
       the radar signal  could  be  roughly estimated by the  size  of  the
       object (D) that they want to detect (according to the impact hazard)

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