brainstorming, and need some launcher costs and payloads...

I'm brainstorming about the upcoming Mars program, and I have a bunch of
questions that are now bugging me:

* What's the payload to a LEO parking orbit, and cost, of the following
vehicles: Sea Launch, Delta 4, Delta 4-Heavy, Atlas 5, Atlas 5-Heavy?

* I *think* the Delta and Atlas use hydrogen-fueled upper stages. Are
the upper stages of the Sea Launch "storable" in LEO?

I'm thinking along the lines of how cheaply one could build a "Flags and
Footprints" Mars mission, just as a thought experiment.

EVEN if one limits oneself to using currently available US boosters like
Delta or Atlas, with a little bit of Sea Launch thrown in.

What sort of volume discounts do you think could be gotten from the above?

Sea Launch is mainly Ukranian, right?

Thanks a lot...

Phil
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Phil Fraering
http://newsfromthefridge.typepad.com