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The satellite contained three sensors that were used for cartography and disaster monitoring of Asia and the Pacific. JAXA initially hoped to be able to launch the successors to ALOS during 2011, but this was not realized.
The satellite contained three sensors that were used for cartography and disaster monitoring of Asia and the Pacific. JAXA initially hoped to be able to launch the successors to ALOS during 2011, but this was not realized.


In 2008, it was announced that ALOS were too blurry to be useful for map making. Only 52 of 4,300 images of Japan could be updated based on data from ALOS.<ref>{{cite web|title =Japanese satellite flops at map-making: official|url=http://afp.google.com/article/ALeqM5g5iq_BbE3WwyCvOmxfWDvfSJzXlg|date=8 January 2008}}</ref><ref>{{cite web|title=Utilization of Data Acquired by "DAICHI"|url=http://www.jaxa.jp/press/2008/01/20080116_sac_daichi_e.pdf|date=16 January 2008}}</ref> Nevertheless, ALOS was used to analyze several disaster sites.<ref>{{cite web|title=ALOS (Daichi) observes Landslide in Leyte Island, Philippines|url=http://www.eorc.jaxa.jp/en/imgdata/topics/2006/tp060302.html|date=2 March 2006|publisher=Japan Aerospace Exploration Agency}}</ref><ref>{{cite web|title=Continuous monitoring of landslides area caused by Iwate-Miyagi Nairiku earthquake in 2008 using ALOS images|url=http://www.isprs.org/proceedings/xxxviii/part8/pdf/JTS32_20100307155923.pdf}}</ref><ref>{{cite web|title=Latin America Volcano Monitoring With ALOS|url=http://www.asf.alaska.edu/news_notes/6-1/latin-america-volcano-monitoring-alos}}</ref> Images of the devastated Japanese coast following the [[2011 Tōhoku earthquake and tsunami]] were among the last major contributions from ALOS.<ref name=51211-jsddo/>
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.<ref>{{cite web|title =Japanese satellite flops at map-making: official|url=http://afp.google.com/article/ALeqM5g5iq_BbE3WwyCvOmxfWDvfSJzXlg|date=8 January 2008}}</ref><ref>{{cite web|title=Utilization of Data Acquired by "DAICHI"|url=http://www.jaxa.jp/press/2008/01/20080116_sac_daichi_e.pdf|date=16 January 2008}}</ref> Nevertheless, ALOS was used to analyze several disaster sites.<ref>{{cite web|title=ALOS (Daichi) observes Landslide in Leyte Island, Philippines|url=http://www.eorc.jaxa.jp/en/imgdata/topics/2006/tp060302.html|date=2 March 2006|publisher=Japan Aerospace Exploration Agency}}</ref><ref>{{cite web|title=Continuous monitoring of landslides area caused by Iwate-Miyagi Nairiku earthquake in 2008 using ALOS images|url=http://www.isprs.org/proceedings/xxxviii/part8/pdf/JTS32_20100307155923.pdf}}</ref><ref>{{cite web|title=Latin America Volcano Monitoring With ALOS|url=http://www.asf.alaska.edu/news_notes/6-1/latin-america-volcano-monitoring-alos}}</ref> Images of the devastated Japanese coast following the [[2011 Tōhoku earthquake and tsunami]] were among the last major contributions from ALOS.<ref name=51211-jsddo/>


==Decommissioning==
==Decommissioning==

Revision as of 08:56, 5 May 2014

Advanced Land Observing Satellite (ALOS)
COSPAR ID2006-002A Edit this at Wikidata
SATCAT no.28931Edit this on Wikidata
Websitejaxa.jp/projects/sat/alos/
Start of mission
Launch date24 January 2006; 18 years ago (2006-01-24)

Advanced Land Observing Satellite (ALOS), also called Daichi, is a 4-ton 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 a H-IIA rocket. 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. JAXA initially hoped to be able to launch the successors to ALOS during 2011, but this was not realized.

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.[1][2] Nevertheless, ALOS was used to analyze several disaster sites.[3][4][5] Images of the devastated Japanese coast following the 2011 Tōhoku earthquake and tsunami were among the last major contributions from ALOS.[6]

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.[6] 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.

On 12 May 2011, JAXA sent a command to the satellite to power down its batteries and declared it dead in orbit.[6][7]

See also

References

  1. ^ "Japanese satellite flops at map-making: official". 8 January 2008.
  2. ^ "Utilization of Data Acquired by "DAICHI"" (PDF). 16 January 2008.
  3. ^ "ALOS (Daichi) observes Landslide in Leyte Island, Philippines". Japan Aerospace Exploration Agency. 2 March 2006.
  4. ^ "Continuous monitoring of landslides area caused by Iwate-Miyagi Nairiku earthquake in 2008 using ALOS images" (PDF).
  5. ^ "Latin America Volcano Monitoring With ALOS".
  6. ^ a b c "Japanese Satellite Declared Dead in Orbit". Space.com. Retrieved 25 October 2013.
  7. ^ "DAICHI (ALOS) Operation Completion". JAXA. 12 May 2011. Retrieved 25 October 2013.

Category:Derelict satellites orbiting Earth

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