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Johannes Kepler ATV

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Johannes Kepler ATV
Johannes Kepler in orbit, prior to its rendezvous with the ISS
Mission typeISS resupply
OperatorEuropean Space Agency
COSPAR ID2011-007A Edit this at Wikidata
SATCAT no.37368Edit this on Wikidata
Mission duration124 days, 22 hours, 53 minutes
Spacecraft properties
Spacecraft typeAutomated Transfer Vehicle
ManufacturerEADS Astrium
Thales Alenia Space
Launch mass20,050 kilograms (44,200 lb)
Start of mission
Launch date16 February 2011, 21:51 (2011-02-16UTC21:51Z) UTC
RocketAriane 5ES
Launch siteGuiana, ELA-3
ContractorArianespace
End of mission
DisposalDeorbited
Decay date21 June 2011, 20:44 (2011-06-21UTC20:45Z) UTC
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Inclination51.6°
Docking with ISS
Docking portZvezda Aft
Docking date24 February 2011, 15:59:19 UTC[1]
Undocking date20 June 2011, 15:46 UTC[2]
Time docked115 days, 23 hours, 46 minutes
Cargo
Mass7,084 kg (15,618 lb)
Pressurised1,600 kg (3,500 lb)
Fuel5,384 kg (11,870 lb)
Gaseous100 kg (220 lb)
← ATV-1
ATV-3 →

The Johannes Kepler ATV, or Automated Transfer Vehicle 2 (ATV-2), was an uncrewed cargo spacecraft built to resupply the International Space Station (ISS). It was launched on February 16, 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 second of five Automated Transfer Vehicle spacecraft, it was named after the 17th-century German astronomer Johannes Kepler.[7]

The ATV 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 June 20,2011.[10] Johannes Kepler performed a destructive re-entry as intended on 21 June 2011, with its remains impacting the Pacific Ocean.

Spacecraft

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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

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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

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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: [11]

GeoFlow II

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Johannes Kepler delivered the GeoFlow 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

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Launch

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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

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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

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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

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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

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Designation Name Launch date ISS docking date Deorbit date Sources
ATV-1 Jules Verne 9 March 2008 3 April 2008 29 September 2008

[19]

ATV-2 Johannes Kepler 16 February 2011 24 February 2011 21 July 2011

[20]

ATV-3 Edoardo Amaldi 23 March 2012 28 March 2012 3 October 2012[21]

[22]

ATV-4 Albert Einstein 5 June 2013 15 June 2013 2 November 2013

[23] [24]

ATV-5 Georges Lemaître 29 July 2014[25][26] 12 August 2014[25] 15 February 2015[26]

[27] [28]

See also

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References

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  1. ^ a b NASA Live TV broadcast. 24 February 2011. Retrieved 12 January 2013.
  2. ^ ESA ATV blog. Retrieved 11 June 2011.
  3. ^ a b "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. ^ Chris Gebhardt (15 February 2011). "Ariane 5 launches ATV-2 for journey to the ISS". NASASpaceflight.com. Retrieved 20 March 2011.
  6. ^ "Europe's ATV space ferry ready for launch". ESA. 3 February 2011. Retrieved 3 February 2011.
  7. ^ "Second ATV named after Johannes Kepler". ESA. 19 February 2009. Retrieved 16 July 2010.
  8. ^ a b ESA (January 2011). "INFORMATION KIT ATV Johannes Kepler" (PDF). ESA. Retrieved 26 June 2011.
  9. ^ a b c d "Higher Altitude Improves Station's Fuel Economy". NASA. 14 February 2011. Retrieved 4 November 2013.
  10. ^ "Unique Aerospace Invention Ready For Debut". Space Travel.com. 29 March 2011. Retrieved 29 March 2011.
  11. ^ NASA.gov: JK ATV Mission Cargo
  12. ^ "Project Geoflow II flies into space aboard Ariane 5". ASTRIUM. Archived from the original on 27 September 2011. Retrieved 3 August 2011.
  13. ^ Atkinson, Nancy (15 February 2011). "ATV 'Johannes Kepler' Launch to Space Station Delayed to Wednesday". Universe Today. Retrieved 4 November 2013.
  14. ^ Stephen Clark (24 February 2011). "Europe's automated cargo ship docks with space station". Spaceflight Now. Retrieved 20 March 2011.
  15. ^ "NASA Assigns Crew for STS-134 Shuttle Mission, Change to STS-132". NASA. 11 August 2009. Retrieved 31 March 2012.
  16. ^ Moskowitz, Clara (20 June 2011). "Huge Robot Cargo Ship Departs Space Station". Space.com. Retrieved 20 June 2011.
  17. ^ ESA ATV blog. Retrieved 21 June 2011.
  18. ^ ESA ATV blog. Retrieved 21 June 2011.
  19. ^ "ATV-1: Jules Verne". ESA – ATV. Retrieved 1 January 2018.
  20. ^ "ATV-2: Johannes Kepler". ESA – ATV. Retrieved 1 January 2018.
  21. ^ "Mission accomplished for ATV Edoardo Amaldi" (Press release). ESA. 3 October 2012. Retrieved 1 January 2018.
  22. ^ "ATV-3: Edoardo Amaldi". ESA – ATV. Retrieved 1 January 2018.
  23. ^ "ATV Albert Einstein" (AdobeFlash). ESA. April 2013. Retrieved 1 January 2018.
  24. ^ "ATV-4: Albert Einstein". ESA – ATV. Retrieved 1 January 2018.
  25. ^ a b "ATV completes final automated docking". ESA – ATV. 12 August 2014. Retrieved 1 January 2018.
  26. ^ a b "Last ATV reentry leaves legacy for future space exploration". ESA – ATV. 15 February 2015. Retrieved 1 January 2018.
  27. ^ "Fifth ATV named after Georges Lemaitre". ESA – ATV. 16 February 2012. Retrieved 1 January 2018.
  28. ^ "Europe's Space Freighter" (AdobeFlash). ESA. 2014. Retrieved 1 January 2018.
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