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Advanced Land Observing Satellite

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Advanced Land Observing Satellite (ALOS), also called Daichi (a Japanese word meaning "land"), was a 3810 kg Japanese satellite launched in 2006. After five years of service, the satellite lost power and ceased communication with Earth, but remains in orbit.

Launch

ALOS was launched from Tanegashima, Japan, on 24 January 2006 by H-IIA No. 8. The launch had been delayed three times by weather and sensor problems.

Mission

The satellite contained three sensors that were used for cartography and disaster monitoring of Asia and the Pacific Ocean. The Japan Aerospace Exploration Agency (JAXA) initially hoped to be able to launch the successor to ALOS during 2011, but this plan did not materialize.

In 2008, it was announced that the images generated by ALOS were too blurry to be of any use for map making. Only 52 of 4,300 images of Japan could be updated based on data from ALOS.[4][5] Then, JAXA announced the problem was solved.[6]

ALOS was used to analyze several disaster sites.[7][8][9] Images of the devastated Japanese coast following the 2011 Tōhoku earthquake and tsunami were among the last major contributions from ALOS.[10][11]

Decommissioning

Satellite orbital paths, as of October 2013.

In April 2011, the satellite was found to have switched itself into power-saving mode due to deterioration of its solar arrays.[10] Technicians could no longer confirm that any power was being generated. It was suggested that meteoroids may have struck ALOS, creating the anomaly which eventually led to its shutdown.[12]

On 12 May 2011, JAXA sent a command to the satellite to power down its batteries and declared it dead in orbit.[10][13]

See also

References

  1. ↑"ALOS (Advanced Land Observing Satellite) / Daichi". eoPortal.org. Retrieved 2 February 2015.
  2. ↑"Display: ALOS 2006-002A". NASA. 27 April 2021. Retrieved 9 May 2021.Dominio públicoEste artículo incorpora texto de esta fuente, que es de dominio público .
  3. ↑ "ALOS" . N2YO . Consultado el 9 de mayo de 2021 .
  4. ↑ "Satélite japonés fracasa en la cartografía: comunicado oficial" . 8 de enero de 2008. Archivado del original el 20 de mayo de 2011.
  5. ↑ "Utilización de los datos adquiridos por "DAICHI"" (PDF) . 16 de enero de 2008.
  6. ^ "陸域観測技術衛星「だいち」データの地図への利用に関する改善状況について" . 9 de abril de 2008.
  7. ↑ "ALOS (Daichi) observa un deslizamiento de tierra en la isla de Leyte, Filipinas" . Agencia Japonesa de Exploración Aeroespacial. 2 de marzo de 2006.
  8. ↑ "Monitoreo continuo del área de deslizamientos de tierra causados ​​por el terremoto de Iwate-Miyagi Nairiku en 2008 utilizando imágenes ALOS" (PDF) .
  9. ↑ "Monitoreo de volcanes en América Latina con ALOS" . Archivado del original el 28 de julio de 2013.
  10. 1 2 3 "Satélite japonés declarado muerto en órbita" . SPACE.com. 12 de mayo de 2011. Consultado el 25 de octubre de 2013 .
  11. ↑ "Temas del satélite avanzado de observación terrestre "DAICHI" (ALOS): Último mensaje de agradecimiento a DAICHI de la Guardia Costera de Japón" . JAXA. 20 de octubre de 2011. Consultado el 31 de enero de 2023 .
  12. ↑ Satellite Imaging Corporation, Sensor satelital ALOS (2,5 m). Consultado el 15 de septiembre de 2015.
  13. ↑ «Finalización de la operación DAICHI (ALOS)» . JAXÁ. 12 de mayo de 2011. Archivado desde el original el 18 de octubre de 2012 . Consultado el 25 de octubre de 2013 .
  • Artículo sobre ALOS