Johannes Kepler ATV

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This article is about the cargo spacecraft. For the space telescope, see Kepler (spacecraft).
Johannes Kepler ATV
View of ATV-2 - cropped and rotated.jpg
Johannes Kepler in orbit, prior to its rendezvous with the ISS
Mission type ISS resupply
Operator European Space Agency
COSPAR ID 2011-007A
SATCAT № 37368
Spacecraft properties
Spacecraft type ATV
Manufacturer EADS Astrium
Thales Alenia Space
Launch mass 20,050 kilograms (44,200 lb)
Start of mission
Launch date 16 February 2011, 21:51 (2011-02-16UTC21:51Z) UTC
Rocket Ariane 5ES
Launch site Kourou ELA-3
Contractor Arianespace
End of mission
Disposal Deorbited
Decay date 21 June 2011, 20:44 (2011-06-21UTC20:45Z) UTC
Orbital parameters
Reference system Geocentric
Regime Low Earth
Inclination 51.6 degrees
Docking with ISS
Docking port Zvezda Aft
Docking date 24 February 2011, 15:59:19 UTC[1]
Undocking date 20 June 2011, 15:46 UTC[2]
Johannes Kepler ATV.png

The Johannes Kepler ATV, or Automated Transfer Vehicle 002 (ATV-002), was an unmanned cargo spacecraft built to resupply the International Space Station (ISS). It was launched on 16 February 2011 by the European Space Agency (ESA).[3] Johannes Kepler carried propellant, air and dry cargo weighing over 7,000 kilograms (15,000 lb),[4] and had a total mass of over 20,000 kilograms (44,000 lb),[5] making it, at the time, the heaviest payload launched by the ESA.[6] The spacecraft was named after the 17th-century German astronomer Johannes Kepler.[7]

Johannes Kepler was the second ATV cargo resupply vehicle to be launched, following the Jules Verne mission of 2008. Johannes Kepler carried around five tons more cargo than Russia's Progress-M resupply spacecraft, and about 1.5 tons more than the Japanese HTV.[8] The ATV used 4,500 kilograms (9,900 lb) of fuel to boost the ISS's altitude from 350 to 400 km.[9]

Many of the supplies aboard the ATV were used for the Space Shuttle mission STS-133 and the ISS Expedition 26.[1] A Reentry Breakup Recorder was placed aboard the ATV before it undocked from the ISS on 20 June 2011.[10] Johannes Kepler performed a destructive re-entry as intended on 21 June 2011, with its remains impacting the Pacific Ocean.

Spacecraft

Johannes Kepler consisted of two sections: the Propulsion Module, with four main engines and 28 smaller maneuvering thrusters, and the Integrated Cargo Carrier, which attached directly to the ISS and could hold up to eight standard payload racks.[8] The four solar wings of the spacecraft provided up to 4,800 watts of electrical power to its rechargeable batteries.

The ATV's rendezvous and docking system mounted a telegoniometer, which functioned as a radar system, and two videometers, which fired laser pulses at cube-shaped reflectors on the ISS' Zvezda service module for range detection. The nose of the spacecraft contained rendezvous sensors and Russian docking equipment.

Specifications

Diameter at widest point 4.5 metres (15 ft)
Length (probe retracted) 9.7 metres (32 ft)
Spacecraft mass (with fluids loaded) 20,020 kilograms (44,140 lb)
Deployed solar array width 22.3 metres (73 ft)

Mission payload

Cargo Mass
ISS
reboost/attitude
control propellants		 4,534 kilograms (9,996 lb)
ISS
refuel propellant		 850 kilograms (1,870 lb)
Oxygen gas 100 kilograms (220 lb)
Water 0 kilograms (0 lb)
Dry cargo
(food, clothes, equipment)		 1,600 kilograms (3,500 lb)
Total 7,084 kilograms (15,618 lb)
Source: NASA[11]

GeoFlow II

Johannes Kepler delivered the GeoFlowk II hydrodynamics experiment container to the ISS. This experiment was designed to observe liquid movements in microgravity, and compare them with computer simulations, thus helping scientists to understand convection currents within the Earth’s mantle.[12]

Mission summary

Launch

Johannes Kepler's launch as seen from the ISS. The ATV is the thin white plume rising from the Earth in the center of the image.

On 16 February 2011 UTC, Johannes Kepler was launched on an Ariane 5ES rocket from the Guiana Space Centre in Kourou, French Guiana. The launch was conducted by Arianespace on behalf of the ESA.[3]

The first launch attempt, on 15 February 2011, was halted four minutes before lift-off, due to an erroneous signal from one of the rocket's fuel tanks.[13]

Docking

Johannes Kepler approaches the ISS on 24 February 2011.
Johannes Kepler ATV prepares to dock with the Zvezda module of the ISS.

Docking with the ISS was completed on 24 February 2011 at 15:59 UTC, after a 15-minute delay.[14] The spacecraft traveled over eight days to catch up with the space station, and arrived at the aft port of the station's Zvezda service module. During the rendezvous operations, ATV-2 traveled a total of 2.5 million miles. The docking occurred as ATV-2 and the ISS flew over the coast of Liberia in western Africa. Hooks and latches engaged a few minutes later to firmly attach ATV-2 to the ISS.

The Johannes Kepler mission marked the first time European astronauts were on board the International Space Station during an ATV mission, with Italian astronaut Paolo Nespoli welcoming the ATV's arrival. ESA astronaut Roberto Vittori was also aboard the ISS at the same time as the ATV, having arrived on Space Shuttle Endeavour on the STS-134 mission in May 2011.[15]

ISS altitude Increase

Close-up view of Johannes Kepler ATV (top), photographed from the departing Space Shuttle Discovery on 7 March 2011.

Johannes Kepler was used to boost the ISS's standard altitude from about 350 kilometers (220 statute miles) to 400 km (248 miles).[9] The higher altitude has lower atmospheric drag, which reduces the propellant needed annually to maintain the station's altitude from 6,800 kg (15,000 lb) to roughly 3,630 kg (8,000 lb), depending on atmospheric conditions.[9] The ATV used about 4,500 kg (9,900 lb) of rocket fuel to accomplish this change, with the reboost occurring incrementally over several months.[9]

End of mission and deorbit

On 20 June 2011, Johannes Kepler undocked from the ISS.[16] At 18:30 UTC (20:30 CEST) that same day, while preparing to deorbit, the ATV was forced to conduct a debris-avoidance maneuver, using some of its remaining fuel to move into a safe orbit after NASA warned of a potential collision with orbital debris.[17] On 21 June 2011, the ATV deorbited, burning up in the atmosphere as planned over the South Pacific Ocean at around 22:44 CET.[18]

ATV missions

Designation Name Launch date ISS docking date Deorbit date Sources
ATV-1 Jules Verne 9 March 2008 3 April 2008 29 September 2008 [19][20]
ATV-2 Johannes Kepler 16 February 2011 24 February 2011 21 June 2011 [21][22]
ATV-3 Edoardo Amaldi 23 March 2012 28 March 2012 4 October 2012 [23][24][25][26]
ATV-4 Albert Einstein 5 June 2013 15 June 2013 2 November 2013 [27][28][29][30]
ATV-5 Georges Lemaître 29 July 2014 12 August 2014 15 February 2015 [31][32]

See also

References

  1. ↑ 1.0 1.1 NASA Live TV broadcast. 24 February 2011. Retrieved 12 January 2013.
  2. ↑ ESA ATV blog. Retrieved 11 June 2011.
  3. ↑ 3.0 3.1 "Europe’s ATV Johannes Kepler supply ship on its way to Space Station". ESA Portal. 16 February 2011. Retrieved 6 December 2011.
  4. ↑ NASA's Consolidated Launch Schedule. Retrieved 22 March 2012.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ 8.0 8.1 Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ 9.0 9.1 9.2 9.3 "Higher Altitude Improves Station's Fuel Economy". NASA. 14 February 2011. Retrieved 4 November 2013.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ NASA.gov: JK ATV Mission Cargo
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  16. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  17. ↑ ESA ATV blog. Retrieved 21 June 2011.
  18. ↑ ESA ATV blog. Retrieved 21 June 2011.
  19. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  20. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  21. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  22. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  23. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  24. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  25. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  26. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  27. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  28. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  29. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  30. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  31. ↑ http://blogs.esa.int/atv/2014/07/22/arianespace-flight-va219-ariane-5-es-atv-5-launch-scheduled-for-tuesday-july-29/
  32. ↑ http://www.esa.int/Our_Activities/Human_Spaceflight/ATV/Last_ATV_reentry_leaves_legacy_for_future_space_exploration

External links

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