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HTV-1

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Template:Infobox Cargo spacecraft

HTV-1, also known as the HTV Demonstration Flight[1] and HTV Technical Demonstration Vehicle,[2] is the first Japanese H-II Transfer Vehicle, which was launched in September 2009 to resupply the International Space Station. It is an unmanned cargo spacecraft, which is carrying a mixture of pressurised and unpressurised cargo to the space station.

Payloads

HTV-1 carries four and a half tonnes of payload, lower than the six tonne maximum payload of the HTV in order to allow the spacecraft to carry additional propellant and batteries for the in-orbit verification phase of the flight.[3][4]

In the Unpressurised Logistics Carrier, the HTV-1 carries SMILES (Superconducting Submillimetre-Wave Limb Emission Sounder) and HREP (HICO-RAIDS Experiment Payload), which will both be installed in the JEM Exposed Facility on the ISS.[5] The Pressurised Logistics Carrier will carry 3.6 tonnes of supplies for the International Space Station.[3][6] It consists of foods (33% of weight), laboratory experiment materials (20%), robot arm and other hardware for JEM (18%), crew supplies including garments, toiletries, mails and photographs, fluorescent lights, and waste buckets (10%), packing materials (19%).[7]

Development

Before launch, two Captive Firing Tests were conducted on the rocket which was to launch HTV-1. The first test, which consisted of firing the first stage for ten seconds, was originally scheduled to occur at 02:30 GMT on 27 March 2009, however it was cancelled after the launch pad's coolant system failed to activate.[8] This was later discovered to have been due to a manual supply valve not being open.[9] The test was rescheduled for 1 April, but then postponed again due to a leak in a pipe associated with the launch facility's fire suppression system.[10] The test was rescheduled for 2 April,[11] when it was successfully conducted at 05:00 GMT.[12] Following this, the second test, which involved a 150 second burn of the first stage, was scheduled for 20 April.[13] This was successfully conducted at 04:00 GMT on 22 April,[14] following a two day delay due to unfavourable weather conditions.[15] A ground test, using a battleship mockup of the rocket was subsequently conducted on 11 July.[16]

Operation

HTV-1 was launched on the maiden flight of the H-IIB carrier rocket, which occurred on 10 September 2009, at 17:01:46 GMT.[17] The launch took place from the Yoshinobu Launch Complex at the Tanegashima Space Centre, and was the first to use the second pad of the complex.[18] The H-IIB 304 configuration was used, with a type 5S-H payload fairing.[18]

On 17 September, 2009 HTV-1 will rendezvous with the International Space Station.[19] It will approach to within 10 metres (33 ft) of the station, from where it will be grappled using the Canadarm2 robotic arm of the space station. Canadarm2 will then be used to attach it to the Nadir CBM port of the Harmony module. The spacecraft's rendezvous systems are based on those tested on the ETS-VII satellite.[20] It will remain berthed at the station until 14 October.[19]

See also

References

  1. ^ "HTV/H-IIB Special Site". JAXA. Retrieved 2009-08-12.
  2. ^ "HTV Overview". JAXA. Retrieved 2009-08-12.
  3. ^ a b "HTV-1 Mission Press Kit" (PDF). JAXA. September 9, 2009. Retrieved September 11, 2009.
  4. ^ "HTV-1:宇宙ステーション補給機" (in Japanese). JAXA. Retrieved September 2, 2009.
  5. ^ "JFY 2009 Summer Launch Season Launch/Operation and Control Plans for HTV/H-IIB TF1" (PDF). Retrieved September 1, 2009.
  6. ^ "搭載品:宇宙ステーション補給機" (in Japanese). JAXA. August 27, 2009. Retrieved September 2, 2009.
  7. ^ "HTV技術実証機 与圧搭載品 (from the press briefing material)" (in Japanese). JAXA. Retrieved September 11, 2009.
  8. ^ "Postponement of the First Captive Firing Test (CFT) of the First Stage Flight Model Tank for the H-IIB Launch Vehicle". JAXA. 2009-03-27. Retrieved 2009-08-12.
  9. ^ "The First Captive Firing Test for the First Stage Flight Model Tank for the H-IIB Launch Vehicle". JAXA. 2009-03-30. Retrieved 2009-08-12.
  10. ^ "Suspension of the First Captive Firing Test (CFT) of the First Stage Flight Model Tank for the H-IIB Launch Vehicle". JAXA. 2009-04-01. Retrieved 2009-08-12.
  11. ^ "The First Captive Firing Test for the First Stage Flight Model Tank for the H-IIB Launch Vehicle". JAXA. 2009-04-01. Retrieved 2009-08-12.
  12. ^ "Result of the First Captive Firing Test for the First Stage Flight Model Tank of the H-IIB Launch Vehicle". JAXA. 2009-04-02. Retrieved 2009-08-12.
  13. ^ "The Second Captive Firing Test for the First Stage Flight Model Tank for the H-IIB Launch Vehicle". JAXA. 2009-04-17. Retrieved 2009-08-12.
  14. ^ "Result of the Second Captive Firing Test for the First Stage Flight Model Tank of the H-IIB Launch Vehicle". JAXA. 2009-04-22. Retrieved 2009-08-12.
  15. ^ "Postponement of the Second Captive Firing Test (CFT) of the First Stage Flight Model Tank for the H-IIB Launch Vehicle". JAXA. 2009-04-19. Retrieved 2009-08-12.
  16. ^ "Results of the H-IIB Launch Vehicle Ground Test Vehicle (GTV) Test". JAXA. 2009-07-11. Retrieved 2009-08-12.
  17. ^ "Launch Time of H-IIB Launch Vehicle with HTV Demonstration Flight Onboard" (Press release). JAXA / MHI. 2009-09-09. Retrieved 2009-09-09.
  18. ^ a b Krebs, Gunter. "H2 Family". Retrieved 2009-08-11.
  19. ^ a b "ISS On-Orbit Status 09/09/09". NASA. 2009-09-09. Retrieved 2009-09-10.
  20. ^ "HTV: H-II Transfer Vehicle" (PDF). JAXA. Retrieved 2009-08-11.
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