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3.3.6  International Space Station Requirements

Investigations may be proposed for flight on the International Space Station (ISS) as described in Sections 4.1.3 and 5.4.  These flight opportunities are offered in this AO based on milestones in the most recently approved ISS assembly schedule (Revision F).  At the time this AO was issued, the ISS schedule was uncertain as it underwent significant revision.  To learn of any significant change to these milestones, potential proposers should contact the point-of-contact (POC) in the International Space Station Research Opportunities document in the Explorer Program Library (Appendix C).  If these milestones are delayed so that launch occurs beyond the period covered by this AO, NASA reserves the right not to select ISS flight investigations.  In this case, NASA intends to offer ISS opportunities in subsequent Explorer AO’s.

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Requirements for proposals utilizing the ISS are given in Section 3.3.6.

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Requirements for proposals utilizing the ISS are given in Section 3.3.6.

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A Mission of Opportunity investigation may also be proposed to fly on the ISS as a full truss site payload.  An investigation should only be proposed for the ISS full truss site if it cannot be accommodated on other standard ISS sites.  Since only one full truss site is currently available for investigations proposed to this AO, then at most only one full MIDEX investigation (see Section 4.1.3) or one Mission of Opportunity investigation can be selected for the ISS full truss site through this AO.  The accommodation capabilities of the ISS sites are described in the International Space Station Research Opportunities document in the Explorer Program Library (Appendix C).

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For MIDEX investigations, the scientific value of the Minimum Science Mission (see Section 4.5) will also be assessed as part of the determination of the overall scientific merit of the investigation.

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Proposed ISS investigations will be evaluated for the appropriate and efficient use of ISS resources.