Can very small imaging satellites replace unmanned aircraft?
It's a classic chicken or egg dilemma. Small satellites are not being built because there is no cheap way to launch them, and small launchers are not being built because there are no satellites to launch on them. So the U.S. Defense Advanced Research Projects Agency (Darpa) is attacking the problem from both directions simultaneously, with dual programs to develop $500,000 imaging satellites of less than 100 lb. and air-launched boosters to place them in low Earth orbit for $1 million a ...
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