.. dishes on every one of the 12,000 satellites for the same total area [as Arecibo] each have to be over 9 feet. That's about the same size as the chassis of the satellite itself..
.. the receivers need to have very precisely synchronized clocks, and their relative positions need to be known to within a small fraction of the wavelengths you're interested .. you might need to add atomic clocks to every satellite as well..
.. you have to think about how to aim the antennas..
.. fairly sensitive, low-noise, specialized signal processing equipment .. power .. weight..
.. satellites have a roughly 5-year design lifetime..
.. dishes on every one of the 12,000 satellites for the same total area [as Arecibo] each have to be over 9 feet. That's about the same size as the chassis of the satellite itself..
.. the receivers need to have very precisely synchronized clocks, and their relative positions need to be known to within a small fraction of the wavelengths you're interested .. you might need to add atomic clocks to every satellite as well..
.. you have to think about how to aim the antennas..
.. fairly sensitive, low-noise, specialized signal processing equipment .. power .. weight..
.. satellites have a roughly 5-year design lifetime..
then, can it be done ?