Physics
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.947g&link_type=abstract
IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,
Physics
Scientific paper
The International Space Station (ISS) is a unique Earth orbiting laboratory drawing upon the expertise of 16 nations: the US, Canada, Japan, Russia, 11 member nations of the European Space Agency, and Brazil to promote advances in science and technology. This capability is extremely valuable, but comes at very high cost. Under contract to the Marshall Space Flight Center, Microcosm identified an architectural concept to reduce the overhead cost burden associated with ISS operations. The concept focuses on the development of a responsive contingency resupply capability. This concept makes use of non-traditional station resources, minimizes the impact to the station infrastructure, supports an evolution of operations from supervised to full autonomy, and is scaleable from a small cargo delivery to a larger capability. The concept addresses the three mission phases -- launch, phasing and transfer to the Station orbit, and proximity operations. The elements of the architecture include the following: Both the launch vehicle design and launch operations are simple, robust, and fully support a launch-on-demand environment. The launch vehicle third stage is equipped to maneuver the cargo cannister to station altitude, where it awaits rendezvous from the small, yet fully capable multi-mission Orbit Transfer Vehicle (OTV). The OTV performs the close in orbit transfer and proximity operations. Due to the criticality of these operations and the safety required, the OTV is two failure tolerant. The concept allows for the cargo cannisters to be unloaded and reloaded with waste at the convenience of the ISS crew. Safe return of cargo is also addressed. This paper describes the concept in more detail. The various elements of the architecture are defined, the phases of re-supply operations are explained, and concepts for improving the viability of the service are suggested. Perceived obstacles for implementing the service are discussed. System costs are discussed as well as alternative uses of the architecture to enhance commercial viability.
Chinnery A. E.
Gurevich G.
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