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Kounotori 7
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Kounotori 7
Kounotori 7 (こうのとり7号機), also known as HTV-7, was the seventh flight of the H-II Transfer Vehicle (HTV), an uncrewed cargo spacecraft launched on 22 September 2018 to resupply the International Space Station.
Major changes from previous Kounotori include:
To enable HSRC retrieval, the destructive re-entry of Kounotori 7 and the splashdown of HSRC was planned to take place in the northwestern Pacific Ocean near Minami-Tori-shima (Marcus Island), east of the Bonin Islands and the Northern Mariana Islands, instead of the South Pacific used by the previous missions.
Along with resupplying the ISS, this Kounotori flight tested the HTV Small Re-entry Capsule (HSRC), a reentry capsule similar in function to the VBK-Raduga carried on board Progress flights to the Mir space station. Essentially a miniaturized HTV-R capsule, it was carried in the pressurized section of the vehicle. After departing from the station, ground control remotely commanded Kounotori to release the capsule at an altitude of 300 kilometres (190 mi). The capsule used a nitrogen cold gas reaction control system with 3D-printed nozzles, and autonomously performs attitude control to mitigate shock during descent. The capsule was recovered by ship after splashing down off the coast of the Ogasawara Islands. It was then airlifted to Ibaraki Airport via Minami-Tori-shima, from where the samples were delivered to researchers. The capsule could contain a total of 20 kilograms of material (5 kilograms if the payload required refrigeration). The capsule had a diameter of 84 cm, a height of 66 cm, and a mass of less than 180 kg. Tiger Corporation developed the capsule's double vacuum insulated container by applying technology used in vacuum flasks. Some samples produced in the microgravity environment of the ISS deteriorate easily, thus a quick return to the surface is desired. For the demonstration flight, samples including ISS-manufactured protein crystals were placed inside.
On 22 October 2015, a high-altitude drop test of the capsule was successfully conducted off the coast of Taiki, Hokkaido. A second test was conducted on 21 September 2016, with conditions and parameters closer to the actual capsule than the previous year's test. The third and fourth drop tests were done in July and November 2017, respectively.
Kounotori 7 carried about 6200 kg of cargo, consisting of 4300 kg in the pressurized compartment and 1900 kg in the unpressurized compartment.
Cargo in the pressurized compartment (PLC) included:
In the Unpressurized Logistic Carrier (ULC), Kounotori 7 carried 6 lithium-ion batteries Orbital Replacement Units (ORUs) for replacing the ISS's existing nickel-hydrogen batteries. The transportation of replacement batteries was a continuation from the previous Kounotori 6 mission, and continued through to Kounotori 9.
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Kounotori 7
Kounotori 7 (こうのとり7号機), also known as HTV-7, was the seventh flight of the H-II Transfer Vehicle (HTV), an uncrewed cargo spacecraft launched on 22 September 2018 to resupply the International Space Station.
Major changes from previous Kounotori include:
To enable HSRC retrieval, the destructive re-entry of Kounotori 7 and the splashdown of HSRC was planned to take place in the northwestern Pacific Ocean near Minami-Tori-shima (Marcus Island), east of the Bonin Islands and the Northern Mariana Islands, instead of the South Pacific used by the previous missions.
Along with resupplying the ISS, this Kounotori flight tested the HTV Small Re-entry Capsule (HSRC), a reentry capsule similar in function to the VBK-Raduga carried on board Progress flights to the Mir space station. Essentially a miniaturized HTV-R capsule, it was carried in the pressurized section of the vehicle. After departing from the station, ground control remotely commanded Kounotori to release the capsule at an altitude of 300 kilometres (190 mi). The capsule used a nitrogen cold gas reaction control system with 3D-printed nozzles, and autonomously performs attitude control to mitigate shock during descent. The capsule was recovered by ship after splashing down off the coast of the Ogasawara Islands. It was then airlifted to Ibaraki Airport via Minami-Tori-shima, from where the samples were delivered to researchers. The capsule could contain a total of 20 kilograms of material (5 kilograms if the payload required refrigeration). The capsule had a diameter of 84 cm, a height of 66 cm, and a mass of less than 180 kg. Tiger Corporation developed the capsule's double vacuum insulated container by applying technology used in vacuum flasks. Some samples produced in the microgravity environment of the ISS deteriorate easily, thus a quick return to the surface is desired. For the demonstration flight, samples including ISS-manufactured protein crystals were placed inside.
On 22 October 2015, a high-altitude drop test of the capsule was successfully conducted off the coast of Taiki, Hokkaido. A second test was conducted on 21 September 2016, with conditions and parameters closer to the actual capsule than the previous year's test. The third and fourth drop tests were done in July and November 2017, respectively.
Kounotori 7 carried about 6200 kg of cargo, consisting of 4300 kg in the pressurized compartment and 1900 kg in the unpressurized compartment.
Cargo in the pressurized compartment (PLC) included:
In the Unpressurized Logistic Carrier (ULC), Kounotori 7 carried 6 lithium-ion batteries Orbital Replacement Units (ORUs) for replacing the ISS's existing nickel-hydrogen batteries. The transportation of replacement batteries was a continuation from the previous Kounotori 6 mission, and continued through to Kounotori 9.
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