28-February-2008, 12:28 AM
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Senior Member
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Join Date: Mar 2004
Posts: 10,791
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Quote:
Originally Posted by Launch window
Any news on those Japanese supply vessels, it was almost the same concept as ATV ?
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Wikipedia: H-II Transfer Vehicle
JAXA: HTV
NASA: Statement of Michael D. Griffin Administrator, to congressional subcommittee, November 15, 2007 (PDF):
Quote:
Japan’s HTV is an expendable, automated cargo transfer vehicle designed to launch on the H-IIB expendable rocket and rendezvous with the ISS. It will include both pressurized and non-pressurized carriers, thus allowing delivery of rack-mounted equipment, water and gases, and non-pressurized system spares. The HTV has completed its critical design review and is scheduled for demonstration in the mid-2009 period. The cargo capacity will be approximately 5.5 Mt and the lead-time to production is estimated to be three to four years. Japanese plans currently call for a production capacity of one HTV per year. This rate corresponds to Japan’s commitment to fly one HTV per year over the period 2009 – 2015.
A portion of the HTV cargo capacity is owed to the ISS program based on Japan’s share of common system operations costs and prior barter arrangements. This cargo capacity is important since it has already been factored into the ISS baseline program for cargo supply. Approaches to acquiring further HTV cargo delivery services, particularly in the area of non-pressurized system spares, are under evaluation in the event that COTS cargo services are delayed. If system sparing becomes critical to maintain the station and U.S. commercial cargo services are delayed, it would be prudent to have the flexibility to execute a sound contingency plan.
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