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Ugh, you made me look at NASA requirements documents. NASA HLS-RQMT-001 HUMAN LANDING SYSTEM (HLS) REQUIREMENTS DOCUMENT states HLS-R-0071 Landing Site Vertical Orientation The HLS shall provide vertical orientation of 0 to 8° (threshold) and 0 to 5° (goal) from local vertical for surface operations. Rationale: The HLS must support all post-landing crew ...


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