Chang'e 1

The Chinese Lunar Exploration Program is designed to be conducted in four [https://www.youtube.com/watch?v=v7FiaHwv-BI Chang'e 4 press conference]. CNSA, broadcast on 14 January 2019. phases of incremental technological advancement: The first is simply reaching lunar orbit, a task completed by Chang'e 1 in 2007 and Chang'e 2 in 2010. The second is landing and roving on the Moon, as Chang'e 3 did in 2013 and Chang'e 4 did in 2019. The third is collecting lunar samples from the near-side and sending them to Earth, a task for the Chang'e 5 and Chang'e 6 missions. The fourth phase consists of development of a robotic research station near the Moon's south pole.[http://epizodsspace.airbase.ru/bibl/inostr-yazyki/Chinese_Journal_of_Space_Science/2018/5/Xu_et_al_China's_Planning_---_before_2030_Chin_J_Space_Sci_38_(2018).pdf China's Planning for Deep Space Exploration and Lunar Exploration before 2030]. (PDF) XU Lin, ZOU Yongliao, JIA Yingzhuo. Space Sci., 2018, 38(5): 591-592. {{doi|10.11728/cjss2018.05.591}}[http://adsabs.harvard.edu/abs/2018cosp...42E3886Z A Tentative Plan of China to Establish a Lunar Research Station in the Next Ten Years]. Zou, Yongliao; Xu, Lin; Jia, Yingzhuo. 42nd COSPAR Scientific Assembly. Held 14–22 July 2018, in Pasadena, California, USA, Abstract id. B3.1-34-18. The program aims to facilitate a crewed lunar landing in the 2030s and to possibly build an outpost near the south pole.[https://qz.com/1262581/china-lays-out-its-ambitions-to-colonize-the-moon-and-build-a-lunar-palace/ China lays out its ambitions to colonize the moon and build a "lunar palace"]. Echo Huang, Quartz. 26 April 2018.

The Chang'e 1 mission had four major goals:{{cite web | url = http://www.esa.int/esaCP/SEMPM53Z28F_index_0.html | title = Chang'e-1 – new mission to Moon lifts off | publisher = European Space Agency | access-date=2007-10-24}}

1. Obtaining three-dimensional images of the landforms and geological structures of the lunar surface, so as to provide a reference for planned future soft landings. The orbit of Chang'e 1 around the Moon was designed to provide complete coverage, including areas near the north and south poles not covered by previous missions.
2. Analysing and mapping the abundance and distribution of various chemical elements on the lunar surface as part of an evaluation of potentially useful resources on the Moon. China hopes to extend the number of elements studied to 14 (potassium (K), thorium (Th), uranium (U), oxygen (O), silicon (Si), magnesium (Mg), aluminium (Al), calcium (Ca), tellurium (Te), titanium (Ti), sodium (Na), manganese (Mn), chromium (Cr), and lanthanum (La)), compared with the 10 elements (K, U, Th, Fe (iron), Ti, O, Si, Al, Mg, and Ca){{cite journal | journal = Science | date = 1998 | volume = 281 | issue = 5382 | pages = 1484–1489 | doi = 10.1126/science.281.5382.1484 | title = Global Elemental Maps of the Moon: The Lunar Prospector Gamma-Ray Spectrometer | author = D. J. Lawrence | display-authors = 4 | author2 = W. C. Feldman | author3 = B. L. Barraclough | author4 = A. B. Binder | author5 = R. C. Elphic | author6 = S. Maurice | author7 = D. R. Thomsen | pmid = 9727970 | bibcode=1998Sci...281.1484L| doi-access = free }} previously probed by NASA's Lunar Prospector.
3. Probing the features of the lunar soil and assessing its depth, as well as the amount of helium-3 (³He) present.
4. Probing the space environment between 40,000 km. (24854.8 mi) and 400,000 km (248548.5 mi) from the Earth, recording data on the solar wind and studying the impact of solar activity on the Earth and the Moon.

In addition, the lunar probe engineering system, composed of five major systems – the satellite system, the launch vehicle system, the launch site system, the monitoring and control system and the ground application system – accomplished five goals:

• Researching, developing and launching China's first lunar probe
• Mastering the basic technology of placing satellites in lunar orbit
• Conducting China's first scientific exploration of the Moon
• Initially forming a lunar probe space engineering system
• Accumulating experience for the later phases of China's lunar exploration program

According to the schedule, detailed design of the first program milestone was completed by September 2004. Research and development of a prototype probe and relevant testing of the probe were finished before the end of 2005. Design, manufacture, general assembly, test and ground experiments of the lunar orbiter were finished before December 2006.{{citation needed|date=October 2017}}

Originally scheduled for April 2007, the launch was postponed until October as this was "a better time for sending a satellite into the Moon's orbit".{{cite web | url=http://english.cri.cn/2906/2007/03/15/1261@205784.htm | archive-url=https://web.archive.org/web/20070317225442/http://english.cri.cn/2906/2007/03/15/1261@205784.htm | url-status=dead | archive-date=March 17, 2007 | title=Chang'e-1 Satellite Launch Delayed | publisher=China Radio International | date=March 15, 2007 | access-date=2007-10-24}} Chang'e 1 was launched by a Long March 3A rocket at 10:05 GMT on October 24, 2007, from Xichang Satellite Launch Center in Sichuan Province.

After liftoff, Chang'e 1 made three orbits around the Earth, a burn at perigee extending the orbit's apogee further each time, until a final translunar injection burn placed it on course for the Moon on October 31, 2007. Another burn placed it in a polar orbit around the Moon, with burns at the periselenium of the first three orbits decreasing the aposelenium until it entered a final circular orbit. Lunar orbit insertion was achieved on the November 5, 2007. To mark this occasion, the probe transmitted 30 classical Chinese songs and musical pieces, including "My Motherland", "The Song of the Yangtze River", and "High Mountains and Flowing Water".{{citation needed|date=October 2017}}

The probe was remotely controlled from stations at Qingdao and Kashgar, as the first use of the Chinese Deep Space Network. The ESA Maspalomas Tracking Station was also used to transmit signals to and from the probe.{{citation needed|date=October 2017}}

The first pictures of the Moon were relayed on November 26, 2007. The probe was designed to orbit the Moon for one year,{{cite journal

| title=Scientific objectives and payloads of Chang'E-1 lunar satellite

| author=Sūn Huīxiān (孙辉先)

| author2=Dài Shùwǔ (代树武)

| author3=Yáng Jiànfēng (杨建峰)

| author4=Wú Jì (吴季)

| author5=Jiāng Jǐngshān (姜景山)

| name-list-style=amp

| journal=Journal of Earth System Science

| date=2005

| volume=114

| pages=789–794

| url=http://www.ias.ac.in/jessci/dec2005/ilc-25.pdf

| doi=10.1007/BF02715964

| issue=6

|bibcode = 2005JESS..114..789H | s2cid=128428662

}} but operations were later extended, and it remained in lunar orbit until March 1, 2009.

On 1 March 2009, at 08:13:10 UTC, Chang'e 1 crashed onto the surface of the Moon, ending its mission. According to the State Administration of Science, Technology and Industry for National Defense (China), this was a planned and controlled impact.{{cite news | url=http://usatoday30.usatoday.com/tech/science/space/2009-03-02-china-lunar-crash_N.htm | title=China lunar probe mission ends with planned crash | agency=Associated Press | work=USA Today|access-date=2009-03-02 | date=2009-03-02}} Impact point was {{Coord|1.50|S|52.36|E|globe:Moon|display=inline}}.{{cite web|url = https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=2007-051A|title = NASA NSSDC Master Catalog – Chang'e 1|access-date = 2011-01-01}}{{cite web|url = http://english.peopledaily.com.cn/90001/90781/90876/6603492.html|website= China People's Daily Online | date=2 March 2009 |title=Chang'e-1 impacts Moon (coordinates) |access-date = 2011-01-01}}{{cite news | title=Smackdown | work=Aviation Week & Space Technology | date=9 March 2009 | volume=70 | issue=10 | page=16 }} During its orbital mission the probe transmitted 1,400 gigabits or 175 gigabytes (GB) of data.{{Cite web|title=Chang'e-1 - eoPortal Directory - Satellite Missions|url=https://directory.eoportal.org/web/eoportal/satellite-missions/c-missions/chang-e-1|access-date=2021-11-18|website=directory.eoportal.org}}

{{unreferenced section|date=October 2017}}

The Chang'e 1 spacecraft had a mass of {{convert|2350|kg}}, with a {{convert|130|kg|adj=on}} payload, carrying 24 instruments including a charge-coupled device (CCD) stereo camera, microprobe instruments, and a high-energy solar particle detector.

• Stereo camera with an optical resolution of {{convert|120|m}} and spectrometer imager operating at wavelengths of {{convert|0.48|to(-)|0.96|µm|angstrom|abbr=on}}
• Laser altimeter with {{convert|1064|nm|nm|adj=on|disp=out}}, {{convert|150|mJ|mJ|abbr=on|disp=out|lk=out}} laser, a range resolution of {{convert|1|m}} and a spot size of {{convert|300|m}}
• Imaging spectrometer
• Gamma and X-ray spectrometer working in an energy range of 0.5 to 50 keV for X-rays and 300 keV to 9 MeV for gamma rays
• Microwave radiometer detecting 3, 7.8, 19.35 and 37 GHz with a maximal penetration depth of 30, 20, 10, 1 m (98.4, 65.6, 32.8, 3.3 ft) and a thermal resolution of 0.5 K
• High energy particle detector and two solar wind detectors capable of the detection of electrons and heavy ions up to 730 MeV

• Chang'e 1 created an accurate and high resolution 3-D map ever of the lunar surface.
• Chang'e 1 conducted world's first passive, multi-channel, microwave remote sensing of the Moon.

{{Portal|Spaceflight}}

• Chinese space program
• Chinese Lunar Exploration Program (CLEP)
• Exploration of the Moon
• List of missions to the Moon
• List of artificial objects on the Moon

{{Reflist|30em}}

{{Commons category}}

{{wikinews|China launches space probe to the Moon}}

• [https://web.archive.org/web/20071015034940/http://www.clep.org.cn/ CLEP Official site]
• [https://web.archive.org/web/20071028145842/http://solarsystem.nasa.gov/missions/profile.cfm?MCode=CHANGE1 Chang'e 1 Mission Profile] by [http://solarsystem.nasa.gov NASA's Solar System Exploration]
• [https://web.archive.org/web/20070408085556/http://astronautix.com/craft/change.htm Encyclopedia Astronautica]

{{Moon spacecraft}}

{{CLEP}}

{{Chinese spacecraft}}

{{Chinese space program}}

{{Solar System probes}}

{{Orbital launches in 2007}}

Category:Chinese Lunar Exploration Program

Category:Missions to the Moon

Category:Chinese space probes

Category:Space probes launched in 2007

Category:2007 in China

Category:Spacecraft that impacted the Moon

Category:2009 on the Moon

Category:Spacecraft launched by Long March rockets