The plan of the Constellation Program for the exploration of the Moon envisions launching about 600 metric tons (mt) per year to low-Earth orbit, while exploration along the Flexible Path may require somewhat less launch mass each year. NASA scenarios for the exploration of Mars will have comparable annual requirements.
[...]The Phobos routemap has slightly less mass in LEO requirements than 600 tons. [...]
Tugs from LEO to L1 - which L1? EML1? SEL1? Sun-Mars L1? What's the delta vee from the "L1" to Phobos?Why so high ISP?Why Jupiter? Etc etc.I find things are just stated, no reasoning behind them is given.
High ISP could make sense, very low accelerations... But still it requires some investigation, if the delta vee is 15 km/s does it make sense to have 30 or 60 km/s exhaust velocity?