Kounotori 5

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Kounotori 5
A view of the docked Kounotori 5 spacecraft from the Cupola, with Aurora Australis in the background.
Mission typeISS resupply
OperatorJAXA
COSPAR ID2015-038A Edit this at Wikidata
SATCAT no.40873
Mission duration41 days
Spacecraft properties
Spacecraft typeHTV
ManufacturerMitsubishi Heavy Industries
Launch mass16500 kg
Start of mission
Launch date19 August 2015, 11:50:49 UTC
RocketH-IIB No. 5
Launch siteTanegashima, Y2
ContractorMitsubishi Heavy Industries
End of mission
DisposalDeorbited
Decay date29 September 2015, 20:33 UTC
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Altitude400 km
Perigee altitude350 km
Apogee altitude460 km
Inclination51.6°
Period92.5 minutes
Epoch24 August 2015, 11:32:20 UTC [1]
Berthing at ISS
Berthing portHarmony
RMS capture24 August 2015, 10:28 UTC
Berthing date24 August 2015, 17:28 UTC
Unberthing date28 September 2015, 11:12 UTC
RMS release28 September 2015, 16:53 UTC
Time berthed34 days, 23 hours, 25 minutes
Cargo
Mass6057 kg
Pressurised4557 kg
Unpressurised1500 kg
 

Kounotori 5, also known as HTV-5, is the fifth flight of the H-II Transfer Vehicle, an uncrewed cargo spacecraft launched to resupply the International Space Station. It was launched on 19 August 2015.

Specifications

Major changes of Kounotori 5 from previous Kounotori are:[2]

  • Solar panels were reduced to 49 panels, down from 57 on HTV-1 and Kounotori 2, 56 on Kounotori 3, and 55 on Kounotori 4, since the analysis of the data from previous missions showed that fewer panels were sufficient.[3] A sensor-mount outlet was added since Kounotori 4 at a place where previously occupied by a solar panel, and on Kounotori 5 it is used to attach an environment measurement equipment (Kounotori Advanced Space Environment Research equipment (KASPER))[4][5]
  • Improvement of loading the Cargo Transfer Bag allows the increased capacity (maximum 242 CTBs compared to previous 230), and more late access cargo (maximum 92 CTBs compared to previous 80).[2]

When approaching to ISS, previous missions were held at Approach Initiation (AI) point at 5 kilometres (3.1 mi) behind the ISS for system checkout, but Kounotori 5 was changed to continue the approach without holding, to simplify the operation.[2]

Cargo

Kounotori 5 was planned to carry about 6,057 kilograms (13,353 lb) cargo, consisting of 4,557 kilograms (10,046 lb) in the pressurised compartment and 1,500 kilograms (3,300 lb) in the unpressurised compartment.[2][6] Due primarily to the launch failure of SpaceX CRS-7, an additional 200 kilograms (440 lb) were added as the late access cargo. Total cargo weight was 6,057 kilograms (13,353 lb).[7]

Pressurised cargo includes[2][8] potable water (600 litres (130 imp gal; 160 US gal)), food, crew commodities, system components, and science experiment equipments. System components include: UPA Fluids Control and Pump Assembly (FCPA), WPA Multifiltration Beds (WFB), a galley rack to be placed in Unity, and a Simplified Aid For EVA Rescue (SAFER) pack. Science experiment equipments include Mouse Habitat Unit (MHU), Electrostatic Levitation Furnace (ELF), Multi-Purpose Small Payload Rack (MSPR-2), Exposed Experiment Handrail Attachment Mechanism (ExHAM 2), NanoRacks External Platform (NREP), and CubeSats (SERPENS [pt], S-CUBE, fourteen Flock-2b,[9] AAUSAT5, and GOMX-3).

Unpressurised cargo consists of the Calorimetric Electron Telescope (CALET).[2] Plans for a NASA unpressurised module were canceled.[10]

Upon departure from ISS, the unpressurised cargo bay will carry the Multi-mission Consolidated Equipment (MCE) package, the Superconducting Submillimeter-Wave Limb-Emission Sounder (SMILES), and a NASA experiment module, Space Test Program Houston 4 (STP-H4), until its destructive reentry in Earth's atmosphere.[2]

Operation

Launch and rendezvous with the ISS

It was originally planned for launch in 2014 but was later postponed due to delay in the construction and qualification testing [citation needed] of payload to fly on the capsule.[11]

In June 2015, it was scheduled to be launched at around 13:01 UTC on 16 August 2015.[12]

Due to the bad weather forecast, on 14 August 2015 the launch was postponed to August 17,[13] and then on 16 August it was postponed again to 19 August 2015.[14]

Kounotori 5 was successfully launched with a H-IIB No. 5 (H-IIB F5) carrier rocket flying from pad 2 of the Yoshinobu Launch Complex at Tanegashima at 11:50:49 UTC on 19 August 2015.[15] Communication and three-axis attitude controls were established shortly after the launch.[16] Phase Manoeuvre was performed by 19:25 UTC on 20 August 2015,[17] and the first Height Adjustment Manoeuvre by 17:55 UTC on 22 August 2015.[18] The second and third Height Adjustment Manoeuvre were performed by 03:07 and 06:12 UTC on 24 August 2015, respectively.[19][20]

The ISS's robotic arm SSRMS grappled Kounotori 5 at 10:29 UTC on 24 August 2015, and fastened to ISS's CBM at 14:58 UTC on 24 August 2015. All berthing operations were completed at 17:28 UTC on 24 August 2015.[21]

Operation while berthed to ISS

From 02:27 UTC on 25 August 2015, the Exposed Pallet (EP), which is carrying CALET, was extracted from Kounotori 5's Unpressurized Logistics Carrier (ULC) by the ground-controlled SSRMS, and handed off to the Japanese Experiment Module Remote Manipulator System (JEMRMS), which is also remote-controlled from ground. The JEMRMS then attached the palette to the JEM Exposed Facility (EF).[22][23] Later, at 14:29 UTC on the same day, CALET was removed from the pallet and installed to the Exposed Facility by the JEMRMS.[24]

The ISS crew opened the hatch of the Kounotori's Common Berthing Mechanism and entered to Pressurized Logistics Carrier at 10:24 UTC on 25 August 2015 [22] and began transferring the cargo.

Departure from ISS and reentry to earth atmosphere

Kounotori 5 was unberthed from the CBM at 11:12 UTC, 28 September 2015 by SSRMS robotic arm and moved to the release position. The first attempt of the release at 15:20 UTC was aborted due to an anomaly of the SSRMS.[25] After one ISS orbit, Kounotori 5 was released from the SSRMS at 16:53 UTC, 28 September 2015, Expedition 45 Flight Engineer Kimiya Yui of JAXA, backed up by NASA Flight Engineer Kjell Lindgren, commanded the SSRMS.

After the orbit control manoeuvre, Kounotori 5 reentered Earth's atmosphere over the southern Pacific Ocean around 20:33 UTC, 29 September 2015.[26]

References

  1. ^ "HTV-5 Satellite details 2015-038A NORAD 40873". N2YO. 25 August 2015. Retrieved 25 August 2015.
  2. ^ a b c d e f g 宇宙ステーション補給機「こうのとり」5号機(HTV5)ミッションプレスキット (PDF) (in Japanese). JAXA. 21 August 2015. Retrieved 23 August 2015.
  3. ^ Kawasaki, Osamu; Tsujita, Daisuke; Ichikawa, Chiaki (March 2013). HTV電力系の軌道上運用による設計評価と高度化検討 [Evaluation of HTV Electrical Power System and Design Improvement by On-orbit Operation compared with Simulation]. 32nd ISAS Space Energy Symposium (in Japanese). ISAS/JAXA. Retrieved 23 August 2015.
  4. ^ No.1865 :「こうのとり」５号機の機体公開. Space Authors Club (in Japanese). 1 July 2015. Retrieved 4 July 2015.
  5. ^ "Demonstration Experiment of Space Debris Sensor on HTV-5" (PDF). Retrieved 4 July 2015.
  6. ^ Wall, Mike (18 August 2015). "Japanese Supply Ship to Launch Toward Space Station: How to Watch Live". space.com.
  7. ^ JAXA (31 July 2015). 「こうのとり」（HTV）5号機の搭載物変更について (PDF) (in Japanese). Retrieved 17 December 2015.
  8. ^ Dunn, Andrea (15 August 2015). "Stork Set to Make Special Space Station Delivery". www.nasa.gov. NASA. Retrieved 15 August 2015.
  9. ^ Holm, Rachel (13 August 2015). "Kounotori "White Stork" to Carry 14 Doves to ISS". Planet Pulse. Planet Labs. Retrieved 16 August 2015.
  10. ^ 宇宙ステーション補給機「こうのとり」5号機（HTV5）の接近・係留・離脱フェーズに係る安全検証結果について (PDF) (in Japanese). JAXA. 9 June 2015. Retrieved 4 July 2015.
  11. ^ 無人輸送機「こうのとり」打ち上げ先送り　積み荷準備遅れ (in Japanese). Nikkei. 5 August 2014. Retrieved 10 January 2015.
  12. ^ "Launch of the H-II Transfer Vehicle "KOUNOTORI5" (HTV5) aboard the H-IIB Launch Vehicle No. 5". JAXA. 9 June 2015. Retrieved 9 June 2015.
  13. ^ "Launch Postponement of H-IIB Launch Vehicle No. 5 with H-II Transfer Vehicle "KOUNOTORI5" (HTV5) Onboard". JAXA. 14 August 2015. Retrieved 14 August 2015.
  14. ^ "Launch Postponement of H-IIB Launch Vehicle No. 5 with H-II Transfer Vehicle "KOUNOTORI5" (HTV5) Onboard". JAXA. 16 August 2015. Retrieved 16 August 2015.
  15. ^ "Launch Success of H-II Transfer Vehicle "KOUNOTORI5" (HTV5) by H-IIB Launch Vehicle No. 5". JAXA. 19 August 2015. Retrieved 19 August 2015.
  16. ^ "KOUNOTORI5 Establishes Three-Axis Attitude". JAXA. 19 August 2015. Retrieved 24 August 2015.
  17. ^ "KOUNOTORI5 Completes the First Phase Maneuver". JAXA. 20 August 2015. Retrieved 24 August 2015.
  18. ^ "KOUNOTORI5 Completes the First Height Adjustment Maneuver". JAXA. 24 August 2015. Retrieved 24 August 2015.
  19. ^ "KOUNOTORI5 Completes the Second Height Adjustment Maneuver". JAXA. 24 August 2015. Retrieved 24 August 2015.
  20. ^ "KOUNOTORI5 Completes the Third Height Adjustment Maneuver". JAXA. 24 August 2015. Retrieved 24 August 2015.
  21. ^ "ISS Crew Concludes KOUNOTORI5 Berthing Operations". JAXA. 25 August 2015. Retrieved 25 August 2015.
  22. ^ a b "Transfer of the Exposed Pallet (EP) was Completed. Crew entered KOUNOTORI5". JAXA. 25 August 2015. Retrieved 27 August 2015.
  23. ^ "ISS Daily Summary Report – 08/25/15". ISS On-Orbit Status Report. NASA. 25 August 2015. Retrieved 27 August 2015.
  24. ^ "CALET installation completed". JAXA. 26 August 2015. Retrieved 27 August 2015.
  25. ^ "ISS Daily Summary Report – 09/28/15". NASA. 28 September 2015. Retrieved 30 September 2015.
  26. ^ "Successful re-entry of H-II Transfer Vehicle "KOUNOTORI5" (HTV5)". JAXA. 30 September 2015. Retrieved 30 September 2015.

External links

Wikimedia Commons has media related to HTV-5.
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