> Don't assume that launches for refueling operations happen during the launch window. The window is really as long as you want it to be for refueling. Indeed,

> Don't assume that launches for refueling operations happen during the launch window. The window is really as long as you want it to be for refueling. Indeed, the parent comment was making a bad assumption. If you look at it that way, refueling can happen anytime in the 2-years between windows. So say 10,000 launches over 730 days is 13 or 14 launches per day. Given multiple launch sites, seems feasible enough (in the same sense of feasible as producing 100,000 tonnes of goods destined for mars every 2 years).