| 词条 | Advanced Land Observation Satellite |
| 释义 |
| name = Advanced Land Observing Satellite | image = JAXA_advanced_land_observing_satelite.jpg | image_caption = ALOS model exposed at Tokyo Museum of Modern Art | image_alt = ALOS spacecraft model | image_size = | mission_type = Earth observation | operator = JAXA | COSPAR_ID = 2006-002A | SATCAT = 28931 | website = {{URL|http://global.jaxa.jp/projects/sat/alos/index.html}} | mission_duration = 5 years, 3 months, 18 days | manufacturer = NEC Toshiba Mitsubishi Electric | launch_mass = {{convert|4000|kg|lb|abbr=on}}[1] | dry_mass = {{convert|3810|kg|lb|abbr=on}}[1] | dimensions = {{convert|18.9|x|27.4|x|6.2|m|ft|abbr=on}} | power = 7000 Watt | launch_date = {{start-date|24 January 2006, 01:33|timezone=yes}} UTC[2] | launch_rocket = H-IIA rocket | launch_site = Tanegashima Space Center | entered_service = | disposal_type = decommissioned | deactivated = 12 May 2011, 10:50 | decay_date = | orbit_epoch = 27 January 2015, 09:27:58 UTC[3] | orbit_reference = Geocentric | orbit_regime = Sun-synchronous | orbit_semimajor = {{convert|7066|km|mi}}[3] | orbit_periapsis = {{convert|693.8|km|mi}}[3] | orbit_apoapsis = {{convert|696.3|km|mi}}[3] | orbit_inclination = 98.0 degrees[3] | orbit_period = 98.5 minutes[3] | apsis = gee | instruments = PRISM: Panchromatic Remote-sensing Instruments for Stereo Mapping, to measure precise land elevation AVNIR-2: Advanced Visible and Near Infrared Radiometer type 2, which observes what covers land surfaces. 10-meter resolution at nadir PALSAR: Phased Array type L-band Synthetic Aperture Radar, which enables day-and-night and all-weather land observation | next_mission = ALOS-2 }} Advanced Land Observing Satellite (ALOS), also called Daichi (a Japanese word meaning "land"), 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. LaunchALOS was launched from Tanegashima, Japan, on 24 January 2006 by H-IIA rocket No. 8. The launch had been delayed three times by weather and sensor problems. MissionThe satellite contained three sensors that were used for cartography and disaster monitoring of Asia and the Pacific. 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.[16][10] DecommissioningIn April 2011, the satellite was found to have switched itself into power-saving mode due to deterioration of its solar arrays.[16] 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.[11] On 12 May 2011, JAXA sent a command to the satellite to power down its batteries and declared it dead in orbit.[12][13] See also{{Portal|Spaceflight}}
References1. ^1 {{cite web |url=https://directory.eoportal.org/web/eoportal/satellite-missions/a/alos |title=ALOS (Advanced Land Observing Satellite) / Daichi |work=eoPortal.org |accessdate=2 February 2015}} 2. ^{{cite web |url=http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=2006-002A |title=NASA – NSSDC – Spacecraft Details |publisher=NASA |accessdate=2 February 2015 |archive-url=https://web.archive.org/web/20120127063011/http://nssdc.gsfc.nasa.gov/nmc/spacecraftDisplay.do?id=2006-002A |archive-date=27 January 2012 |dead-url=yes |df=dmy-all }} 3. ^1 2 3 4 5 {{cite web|url=http://www.n2yo.com/satellite/?s=28931|title=ALOS Satellite details 2006-002A NORAD 28931|publisher=N2YO|date=2 February 2015|accessdate=2 February 2015}} 4. ^{{cite web|title=Japanese satellite flops at map-making: official|url=http://afp.google.com/article/ALeqM5g5iq_BbE3WwyCvOmxfWDvfSJzXlg|date=8 January 2008|deadurl=yes|archiveurl=https://web.archive.org/web/20110520115235/http://afp.google.com/article/ALeqM5g5iq_BbE3WwyCvOmxfWDvfSJzXlg|archivedate=20 May 2011|df=dmy-all}} 5. ^{{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}} 6. ^{{cite web|title=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|url=http://www.jaxa.jp/press/2008/04/20080409_sac_daichi_j.html|date=9 April 2008}} 7. ^{{cite web|title=ALOS (Daichi) observes Landslide in Leyte Island, Philippines|url=http://www.eorc.jaxa.jp/en/earthview/2006/tp060302.html|date=2 March 2006|publisher=Japan Aerospace Exploration Agency}} 8. ^{{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}} 9. ^{{cite web|title=Latin America Volcano Monitoring With ALOS|url=http://www.asf.alaska.edu/news_notes/6-1/latin-america-volcano-monitoring-alos|deadurl=yes|archiveurl=https://web.archive.org/web/20130728155910/http://www.asf.alaska.edu/news_notes/6-1/latin-america-volcano-monitoring-alos|archivedate=28 July 2013|df=dmy-all}} 10. ^1 Last thank-you message to DAICHI from Japan Coast Guard – Advanced Land Observing Satellite "DAICHI" (ALOS) (JAXA webpage) 11. ^Satellite Imaging Corporation, ALOS Satellite Sensor (2.5m) (Accessed 15 September 2015) 12. ^1 2 {{cite web|title=Japanese Satellite Declared Dead in Orbit|url=http://www.space.com/11653-japanese-satellite-declared-dead-daichi.html|publisher=Space.com|accessdate=25 October 2013}} 13. ^{{cite web|title=DAICHI (ALOS) Operation Completion|url=http://www.jaxa.jp/press/2011/05/20110512_daichi_e.html|publisher=JAXA|accessdate=25 October 2013|date=12 May 2011}} External links
8 : Earth observation satellites of Japan|JAXA|Space synthetic aperture radar|Japan Coast Guard|2011 Tōhoku earthquake and tsunami|Derelict satellites orbiting Earth|Spacecraft launched by H-II rockets|Spacecraft launched in 2006 |
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