Kare's paper suggests that laser launch could meet the launch rate and cost to make SBSP feasible and economical.
http://fennetic.net/irc/897Kare-modular-laser-launch.pdf
However, we estimate that with plausible assumptions, even the “full up” cost of laser launch, including vehicles, operations and maintenance, and capital amortization, can easily be below $220/kg ($100/lb), provided the launcher is used at a reasonable fraction of its full capacity.
High launch rate
5-10 minutes per launch, as long as the laser runs
• Huge total launch capacity: >10,000 launches per year
• Rapid response
• Uniquely testable -- 1000 test launches in <1 month
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