I used to think that a Mir/Zvedza style Core module would have been a good Habitat base block module to park out there; beyond the Moon etc. But with the strained relations with Russia - plus the snails pace with which they work these days - I guess it's just not going to happen. Shame that A combination of an unused MPLM and 1 or two stretched Cygnus' perhaps?
Are electric thrusters suitable for sustaining LLO? I know that is a fairly unstable orbit.
Some more information on the DSH in this article. http://www.thespacereview.com/article/3187/1Having international partners providing bulk of modules, reduces demand on NASA budget. NASA has stated in past that DSH would be available to commercial groups to use eg staging post for commercial lunar missions. This from article.While NASA has not officially announced any specific mission objectives for SLS launches beyond EM-2 (except for the Asteroid Redirect Crewed Mission), information obtained by Anatoly Zak suggests the assembly of the outpost could begin in 2023 with the launch of an 8.5-ton US-European propulsion and power module equipped with electric thrusters as well as a Canadian-built robot arm. It would ride piggyback on the SLS together with Orion on the vehicle’s Exploration Mission 3 (EM-3). Two subsequent SLS launches would add European and Japanese habitation modules to give the outpost an initial human-tended capability. Japan has reportedly agreed to contribute a habitat module featuring a closed-loop life support system that would significantly reduce its dependence on oxygen and water supplies from Earth. Also under consideration is a 10-ton European-Japanese-Canadian robotic vehicle that could be equipped with a rover and ascent stage for returning soil samples from the Moon beginning in 2026. The international team has also studied the possibility of carrying out crewed sorties to the lunar surface from the outpost.The second assembly phase in the late 2020s would see the addition of a large US habitation and power module launched on a dedicated SLS cargo mission. According to Zak, this would be equipped with new electric propulsion systems and enable the outpost “to become the first interplanetary crewed spacecraft heading into deep space to explore asteroids or even reach the vicinity of Mars in the 2030s.” Whatever path is ultimately chosen, the current strategy is flexible enough to begin construction of the outpost in the early 2020s without the need for an early commitment to its final goal.Information from other sources indicates that the team is shying away from the idea to place the station at the EM-L2 point beyond the Moon. Other orbits seriously evaluated by the team were low lunar orbits (LLO), near rectilinear orbits (NRO), and distant retrograde orbits (DRO). All these were judged on the basis of such factors as accessibility from Earth (and other lunar orbits, stationkeeping requirements, Earth communication capabilities, eclipse durations, and thermal environment impacts.
A US/European-built module with SEP and a Canadian arm, budgeted for, designed, built, tested, and ready to go, in 6 years? Is that achievable? (Lofting big payloads seems like a reasonable thing for SLS to do. But the timescale seems a little short, unless a lot of the design work is already well under way.)
Gerstenmaier said development of the outpost could begin with the second and third SLS missions, EM-2 and -3
QuoteGerstenmaier said development of the outpost could begin with the second and third SLS missions, EM-2 and -3http://spacenews.com/nasa-moving-ahead-with-plans-for-cislunar-human-outpost/
It all depends on the money, which has not been there previously.
Supports and expands public-private partnerships as the foundation of future U.S. civilian space efforts. The Budget creates new opportunities for collaboration with industry on space station operations, supports public-private partnerships for deep-space habitation and exploration systems, funds data buys from companies operating small satellite constellations, and supports work with industry to develop and commercialize new space technologies.
there are real requirements for a potential cislunar habitat, for one NASA would like to see a close analog to a Mars transit habitat, the following is the requirements list for such habitats (making a collection of tiny modules much less likely).
Here is project that would keep DSH busy for while.16m Telescope assembled in space.http://www.manyworlds.space/index.php/2017/03/15/a-vision-that-could-supercharge-nasa/
Quote from: TrevorMonty on 03/20/2017 01:09 AMHere is project that would keep DSH busy for while.16m Telescope assembled in space.http://www.manyworlds.space/index.php/2017/03/15/a-vision-that-could-supercharge-nasa/Not big enough. If you're going to do a telescope too big to just unfold like JWST, then you should make it HUGE, like 50m.