Kare's paper suggests that laser launch could meet the launch rate and cost to make SBSP feasible and economical.
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