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NTRS document outlining the Exploration Upper Stage (formerly the Dual Use Upper Stage): http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20130013953.pdf.
In summary: The EUS would be used for the TLI and LOI burns and use its own RCS for a controlled crash on the lunar surface, freeing up the Orion MPS for the TEI burn.
In summary: The EUS would be used for the TLI and LOI burns and use its own RCS for a controlled crash on the lunar surface, freeing up the Orion MPS for the TEI burn.
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