CryoSat-1

Last updated
CryoSat
CryoSat model ESA384323.jpg
Life-size model of CryoSat
Mission typeEnvironmental
Operator ESA
Website ESA - CryoSat
Mission duration3 years (planned)
Failed to orbit
Spacecraft properties
Manufacturer EADS Astrium
Launch mass750 kilograms (1,650 lb)
Start of mission
Launch date8 October 2005, 15:02:00 (2005-10-08UTC15:02Z) UTC
Rocket Rokot/Briz-KM
Launch site Plesetsk 133/3
Contractor Eurockot
Orbital parameters
Reference system Geocentric
Regime Low Earth
Epoch Planned
CryoSat Programme
CryoSat-2  →
 

CryoSat-1, also known as just CryoSat , was a European Space Agency satellite which was lost in a launch failure in 2005. The satellite was launched as part of the European Space Agency's CryoSat mission, which aims to monitor ice in the high latitudes. [1] The second mission satellite, CryoSat-2, was successfully launched in April 2010. [2]

Contents

Background

The European Space Agency's CryoSat mission was developed following the success of previous satellite altimeters, including Envisat, ERS-1 and ERS-2. [3] The primary aim of the mission is to allow scientists to measure sea ice thickness and monitor changes on the Greenland and Antarctic ice sheets using radar altimetry. [4] The primary instrument on board the satellite was the Synthetic Aperture Interferometric Radar Altimeter (SIRAL), specifically designed to measure both sea ice and polar ice sheets. The method can allow detection of small changes in ice height and sea level, meaning scientists can measure both sea ice thickness and elevation change. [5] A second instrument, DORIS, was to have been used to calculate precisely the spacecraft's orbit. [6] It also carried an array of retroreflectors which would have allowed measurements to be made from the ground to verify the orbital data provided by DORIS. [7] [6] [8]

The spacecraft was the first in the European Space Agency's Earth Explorer missions, [9] and was intended to operate in low Earth orbit for three years at an unusually high inclination, therefore reaching the high latitudes. [10] Construction began in 2001, with EADS Astrium being award the contract to build the satellite. Eurockot was to conduct the launch of the satellite using a Rokot/Briz-KM carrier rocket. [11] The spacecraft cost €95 million and weighed 750 kilograms. [9]

Launch failure

In September 2005, CryoSat-1 arrived at the launch site in Plesetsk Cosmodrome, Russia. [11] CryoSat-1 was launched at 15:02:00 UTC on 8 October 2005, however, the satellite failed to reach orbit. The European Space Agency reported that the first stage performed nominally, but the second stage main engine cut-off did not occur as expected. [12] A missing command from the onboard flight control system resulted in the main engine continuing to operate until remaining fuel was depleted. [12] Therefore, the separation of the second stage and upper stage did not happen, and the satellite could not reach orbit. [12] CryoSat-1 fell into the drop zone north of Greenland near the North Pole. There were no safety concerns to populated areas. [12]

Due to the importance of the CryoSat mission for monitoring Earth's polar regions, a recovery mission was announced less than five months after CryoSat's failure. [10] CryoSat-2 was successfully launched in 2010. [2]

See also

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References

  1. ↑ "CryoSat - Earth Online". earth.esa.int. Retrieved 2022-02-22.
  2. 1 2 "CryoSat-2 launch timeline". www.esa.int. Retrieved 2022-02-22.
  3. ↑ Laxon, Seymour W.; Giles, Katharine A.; Ridout, Andy L.; Wingham, Duncan J.; Willatt, Rosemary; Cullen, Robert; Kwok, Ron; Schweiger, Axel; Zhang, Jinlun; Haas, Christian; Hendricks, Stefan (2013-02-28). "CryoSat-2 estimates of Arctic sea ice thickness and volume: CRYOSAT-2 SEA ICE THICKNESS AND VOLUME". Geophysical Research Letters. 40 (4): 732–737. doi:10.1002/grl.50193. hdl: 1912/5923 . S2CID   396075.
  4. ↑ "CryoSat". www.esa.int. Retrieved 2022-02-22.
  5. ↑ "CryoSat". CPOM. Retrieved 2022-02-22.
  6. 1 2 "ILRS Mission Support". Cryosat-1. NASA International Laser Ranging Service. Archived from the original on 25 July 2010. Retrieved 19 July 2010.
  7. ↑ "Cryosat-1". NASA International Laser Ranging Service. Archived from the original on 19 June 2010. Retrieved 19 July 2010.
  8. ↑ "CryoSat Mission lost due to launch failure". European Space Agency. 8 October 2005. Retrieved 19 July 2010.
  9. 1 2 "ESRIN hosts Europe's main CryoSat launch event". www.esa.int. Retrieved 2022-02-22.
  10. 1 2 "ESA confirms CryoSat recovery mission". www.esa.int. Retrieved 2022-02-22.
  11. 1 2 "CryoSat". www.astronautix.com. Archived from the original on August 29, 2016. Retrieved 2022-02-22.
  12. 1 2 3 4 "CryoSat Mission lost due to launch failure". www.esa.int. Retrieved 2022-02-22.

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