cosmos.wikisort.org - Spacecraft

Kounotori 9 (こうのとり9号機), also known as HTV-9 was the 9th flight of the H-II Transfer Vehicle, a robotic cargo spacecraft to resupply the International Space Station (ISS).[4][5] It was launched on 20 May 2020, at 17:31:00 UTC.[6]

Kounotori 9

Mission type	ISS resupply
Operator	JAXA
COSPAR ID	2020-030A
SATCAT no.	45607
Mission duration	92 days
Spacecraft properties
Spacecraft	Kounotori 9
Spacecraft type	H-II Transfer Vehicle
Manufacturer	Mitsubishi Heavy Industries
Launch mass	16500 kg[1]
Payload mass	6200 kg
Dimensions	9.8 meters in length, 4.4 metres in diameter
Start of mission
Launch date	20 May 2020, 17:31:00 UTC[2]
Rocket	H-IIB F9 (last)
Launch site	Tanegashima, LA-Y2
Contractor	Mitsubishi Heavy Industries
End of mission
Disposal	Deorbited
Decay date	20 August 2020, 07:07 UTC
Orbital parameters
Reference system	Geocentric orbit
Regime	Low Earth orbit
Inclination	51.66°
Epoch	20 May 2020
Berthing at International Space Station
Berthing port	Harmony nadir
RMS capture	25 May 2020, 12:13 UTC[3]
Berthing date	25 May 2020, 14:46 UTC[3]
Unberthing date	18 August 2020, 13:51 UTC
RMS release	18 August 2020, 17:36 UTC
Time berthed	85 days, 2 hours, 50 minutes
Cargo
Mass	6200 kg
Pressurised	4300 kg
Unpressurised	1900 kg
HTV ISS Resupply ← Kounotori 8 HTV-X1 →

Kounotori 9 is the last HTV of the original model, with following missions replaced with the HTV-X.[4][7]

Spacecraft

Major difference from the previous Kounotori are:[8]

• Camera assembly unit and Wireless LAN communication unit (WLD), described below.

Wireless LAN Demonstration

Wireless LAN Demonstration, or WLD (pronounced wild)[8] is an experiment that will be performed during Kounotori 9's flight. During the test, a video taken by Kounotori 9 will be broadcast in real time on board the space station, via a wireless LAN (WLAN) datalink.[9] The experiment will be conducting during Kounotori 9's approach, departure, and while berthed to the ISS.[10] For WLD, the spacecraft has a camera attached to its propulsion module, while a data processor and WLAN antenna is located at the Unpressurized Logistics Carrier's aperture.[8] The technology to be tested by WLD will enable ISS crews to monitor approaching vehicles during an autonomous docking.[11] According to JAXA, if successful this will be the first time for two spacecraft to communicate using WLAN during a rendezvous.[8]

Cargo

Kounotori 9 carried about 6200 kg of cargo mass, consisting of 4300 kg in the pressurized compartment and 1900 kg in the unpressurized compartment.[8] In addition to food items and crew commodities, the pressurized compartment (Pressurized Logistics Carrier; PLC)'s cargo consists of:[8]

• JAXA cargo:
  • Solid Combustion Experiment Module (SCEM)
  • Integrated Standard Imager for Microsatellites (iSIM), a commercial technology demonstration payload by Satlantis
  • Equipment for the space media business collaboration (Space Frontier Studio KIBO)
  • Confocal Space Microscopy (COSMIC)

• NASA cargo:
  • EXPRESS Rack 11B (ER11B)
  • Tank for Water Storage System (WSS)
  • High-pressure nitrogen tank for Nitrogen Oxygen Recharge System (NORS)

• ESA cargo:
  • European Drawer Rack Mark II (EDR2)

Cargo in the unpressurized compartment (Unpressurized Logistics Carrier, ULC) was the Exposed Pallet (EP9) which carries the six lithium-ion batteries Orbital Replacement Units (ORUs) for replacing the ISS's existing nickel-hydrogen batteries. This was the last of the series of transportation of replacement batteries, following the previous Kounotori 6, Kounotori 7, and Kounotori 8.

On departure from ISS, Kounotori 9 was loaded with the Exposed Pallet of Kounotori 8 (EP8) carrying the replaced nickel-hydrogen batteries. It was left on ISS due to the missed extravehicular activity during the Kounotori 7 mission for the launch failure of Soyuz MS-10 in 2018. The Exposed Pallet of Kounotori 9 (EP9) was left on ISS, and subsequently, it was disposed of by jettisoning into orbit on 11 March 2021 using Space Station Remote Manipulator System (SSRMS), carrying old nickel-hydrogen batteries.[1][12]

Operations

Launch

Kounotori 9 was launched aboard the ninth and final launch of H-IIB rocket on 20 May 2020, at 17:31:00 UTC.[2] The launch took place amid the COVID-19 pandemic, so that the usual launch viewing places were closed to spectators, and the local town offices requested not to visit for launch observation.[13]

After the successful launch, the Kounotori 9 arrived to the proximity of the International Space Station on 25 May 2020, and it was captured by SSRMS at 12:13 UTC.[14] It was mated to the Harmony's Common Berthing Mechanism (CBM). Berthing operation completed at 18:25 UTC.[15]

Operation while berthed to ISS

ISS crew opened the hatch of the Kounotori's PLC, and entered at 19:24 UTC.[16] Cargo transfer of the pressurized cargo by the crew began on 26 May 2020.[17]

Exposed Pallet (EP9), which carries lithium-ion batteries, was extracted from the ULC by the ground-operated SSRMS on 1 June 2020.[18] Then, Kounotori 8's Exposed Pallet (EP8), carrying old nickel-hydrogen batteries, was stowed into the ULC on 02:48 UTC, 2 June 2020.[19]

Departure and reentry to the Earth atmosphere

On 18 August 2020, Kounotori 9 was detached from Harmony's CBM by the SSRMS, and it was released into orbit at 17:36 UTC. It was disposed by the destructive reentry to the Earth atmosphere at around 07:07 UTC, on 20 August 2020.

References

External links

• HTV9 mission (JAXA)
• The Space Frontier Studio - KIBO
• Real-time orbital tracking - uphere.space

На других языках

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- [en] Kounotori 9

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[ru] Kounotori 9

Конотори 9 (яп. こうのとり9号機, «Аист 9»), также известный как HTV-9 — девятый полёт H-II Transfer Vehicle, беспилотного грузового космического аппарата, запущенного для пополнения запасов на Международной космической станции.

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