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Zhurong (rover)

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This article is about the Chinese Mars rover. For other uses, see Zhurong (disambiguation).

Zhurong
祝融
Part of Tianwen-1
Model of the Tianwen-1 lander and Zhurong.
TypMars rover
EponymZhurong
OwnerChina National Space Administration
ManufacturerChina Academy of Space Technology
Specifications
Dimensions2.6 m × 3 m × 1.85 m
(8 ft 6 in × 9 ft 10 in × 6 ft 1 in)
Launch mass240 kilograms (530 lb)
PowerSolar arrays
RocketLong March 5
Instruments
  • MarSCoDe
  • MCS
  • MSCam
  • NaTeCam
  • RoMAG
  • RoPeR
History
Launched
  • 23 July 2020, 23:18 UTC (2020-07-23UTC23:18)
  • from Wenchang LC-101
Deployed
  • 22 May 2021, 02:40 UTC (2021-05-22UTC02:40)
  • from the Tianwen-1 lander
StandortUtopia Planitia, Mars
Travelled>1.4 km (0.87 mi) on Mars as of 1 January 2022[1]

Zhurong (Chinese: 祝融; pinyin: Zhùróng) is a Mars rover that is China's first rover to land on another planet (they had previously landed two rovers on the Moon). It is part of the Tianwen-1 mission to Mars conducted by the China National Space Administration (CNSA).

The spacecraft was launched on 23 July 2020 and inserted into Martian orbit on 10 February 2021. The lander, carrying the rover, performed a successful soft-landing on Mars on 14 May 2021,[2] making China the second country to successfully soft-land a spacecraft on Mars and establish communications from the surface, after the United States.[3] Zhurong was successfully deployed on 22 May 2021, 02:40 UTC.[4]

Name

Zhurong is named after a Chinese mytho-historical figure usually associated with fire and light, as Mars is called "the Planet of Fire" (Chinese: 火星) in China and some other countries in East Asia. It was selected by a public online vote held between 20 January 2021 and 28 February 2021, with Zhurong ranking first with 504,466 votes.[5] The name was chosen with meaning of "ignite the fire of interstellar exploration in China and to symbolize the Chinese people's determination to explore the stars and to uncover unknowns in the universe".[6]

History

Mockup of the Zhurong rover at the 69th International Astronautical Congress

China began its first interplanetary exploration attempt in 2011 by sending Yinghuo-1, a Mars orbiter, in a joint mission with Russia. It did not leave Earth orbit due to a failure of the Russian launch vehicle.[7] As a result, the Chinese space agency then embarked on its independent Mars mission.

The first early model of the future Mars rover was on display in November 2014 at the 10th China International Aviation & Aerospace Exhibition. It had an appearance similar to the Yutu lunar rover, which had deployed on the Moon.[8]

On 22 April 2016, Xu Dazhe, head of the CNSA, announced that the Mars mission had been approved on 11 January 2016. A probe would be sent to Martian orbit and attempt to land on Mars in 2020.[9]

On 23 August 2016, China revealed the first images of the final version of the Mars mission spacecraft, which confirmed the composition of a Mars orbiter, lander, and rover in one mission.[10]

The scientific objectives and payloads of the Mars mission were declared in a paper published in Journal of Deep Space Exploration in December 2017.[11]

On 24 April 2020, China's interplanetary exploration program was formally announced by CNSA, along with the name Tianwen and an emblem of the program.[12] The first mission of the program, the Mars mission to be carried out in 2020, was named Tianwen-1.[13]

On 24 April 2021, in anticipation of the upcoming landing attempt, CNSA formally announced that the rover would be named Zhurong (Chinese: 祝融号).[14]

Landing area selection

The landing area was determined based on two criteria:[15]

  • Engineering feasibility, including latitude, altitude, slope, surface condition, rock distribution, local wind speed, visibility requirements during the EDL process.
  • Scientific objectives, including geology, soil structure and water ice distribution, surface elements, mineral, and rock distribution, magnetic field detection.

Two areas were preselected in the next stage: Chryse Planitia and Utopia Planitia.

The two landing site candidates of Tianwen-1 mission.
The two landing site candidates of Tianwen-1 mission are enclosed by red lines on Martian map. The one on the left is located in Chryse Planitia and the one on the right in Utopia Planitia.

The candidate in Utopia Planitia was more favored by the team due to higher chances of finding proofs about whether an ancient ocean ever existed on the northern part of Mars.[15] It was eventually selected as the final landing area of the mission.

Mission timeline

Tianwen-1, along with Zhurong rover, was launched at 12:41 UTC+8 on 23 July 2020, from the Wenchang Spacecraft Launch Site by a Long March 5 heavy-lifted rocket.[16]

After a 202-day journey through interplanetary space, Tianwen-1 inserted itself into Martian orbit on 10 February 2021, thereby becoming China's first Mars orbiter.[17] Subsequently, it performed several orbital maneuvers and began surveying target landing sites on Mars in preparation for the coming landing attempt.

On 14 May 2021, the lander and Zhurong rover separated from Tianwen-1's orbiter. After experiencing Mars atmospheric entry that lasted about nine minutes, the lander and rover made a successful soft landing in the Utopia Planitia, using a combination of aeroshell, parachute, and retrorocket.[18] With the landing, China became the second country to operate a fully functional spacecraft on Martian surface, after the United States.

After establishing stable communication with the rover, CNSA released its first pictures from the surface of Mars on 19 May 2021.[19]

On 22 May 2021, at 10:10 a.m. Beijing time (0240 GMT), Zhurong drove from its landing platform to the surface of Mars, starting its exploration mission.[20][21]

On 11 June 2021, CNSA released the first batch of scientific images from the surface of Mars including a panoramic image taken by Zhurong, and a colored group photo of Zhurong and the Tianwen-1 lander taken by a wireless camera placed on Martian soil. The panoramic image is composed of 24 single shots taken by the NaTeCam before the rover was deployed to the Martian surface. The image reveals that the topography and rock abundance near the landing site was consistent with previous anticipations from the scientist on typical south Utopia Planitia features with small but widespread rocks, white wave patterns, and mud volcanoes.[22]

Rover and lander captured by HiRISE from NASA's MRO on June 6, 2021
Rover and lander captured by HiRISE from NASA's MRO on 6 June 2021

On 27 June 2021, CNSA released images and videos of Zhurong's EDL process and movement on Martian surface, including a clip of sounds made by Zhurong recorded by its instrument, Mars Climatic Station (MCS).[23]

As of 11 July 2021, CNSA also announced that Zhurong had travelled more than 410 m (1,350 ft) on Martian surface.[24]

On 12 July 2021, Zhurong visited the parachute and backshell dropped onto Martian surface during its landing on 14 May.[25][26]

Operation records of Zhurong
Date Operational time Distance travelled to date Ref(s)
27 June 2021 42 sols 236 m (774 ft) [27]
11 July 2021 55 sols 410 m (1,350 ft) [28]
17 July 2021 61 sols 509 m (1,670 ft) [29]
30 July 2021 74 sols 708 m (2,323 ft) [30]
6 August 2021 81 sols 808 m (2,651 ft) [31]
23 August 2021 97 sols 1,000 m (3,300 ft) [32]

As of 15 August 2021, Zhurong had officially completed its planned exploration tasks and will continue to drive towards the southern part of Utopia Planitia where it landed.[32] Although the rover's lifespan has been used up, it remains possible for it to still roam on the Martian surface and transmit data to the Tianwen-1 Mars orbiter until its functions cease to perform.

After 20 October 2021, the rover continued, having paused and stopped in a sleeping mode around the time of the Mars conjunction of October 8th. The pause was necessary due to the strong solar radiation in the line of sight with Earth, creating too high levels of "noise" for a secure radio communication to function (Radio blackout) with the Chinese relay satellite orbiting Mars. The rover continued its travel in the southern direction. [33]

Exploration

Objectives

The rover's mission planned tasks are to:[34]

  • Study the topography and geology of the local area
  • Examine the soil, and any ice content
  • Survey the elements, minerals and rocks
  • Atmospheric sampling

Instruments

The configuration and layout of payloads on board the Zhurong rover

The lander carried a Mars Emergency Beacon designed to survive the force of a crash, which was to be deployed in the event of a catastrophic failure. This beacon would have allowed critical engineering data to be collected even if catastrophic failure occurred, to aid future design.[35]

The six-wheeled rover weighs 240 kg, and is 1.85 m tall.[36] It is powered by four solar panels and carries six scientific instruments:[21][34][15]

  • Mars Rover Penetrating Radar (RoPeR) Ground-penetrating radar (GPR), two frequencies, to image about 100 m (330 ft) below the Martian surface[37] It was one of the two very first ground-penetrating radars deployed on Mars, along with the one equipped by NASA's Perseverance rover launched and landed in same years.[38]
  • Mars Rover Magnetometer (RoMAG) obtains the fine-scale structures of crustal magnetic field based on mobile measurements on the Martian surface.
  • Mars Climate Station (MCS) (also MMMI Mars Meteorological Measurement Instrument) measures the temperature, pressure, wind velocity and direction of the surface atmosphere, and has a microphone to capture Martian sounds. During the rover's deployment, it recorded the sound, acting as the second Martian sound instrument to record Martian sounds successfully after Mars 2020 Perseverance rover's microphones.
  • Mars Surface Compound Detector (MarSCoDe) combines laser-induced breakdown spectroscopy (LIBS) and infrared spectroscopy.[34]
  • Multispectral Camera (MSCam) Combined with MarSCoDe, MSCam investigates the mineral components to establish the relationship between Martian surface water environment and secondary mineral types, and to search for historical environmental conditions for the presence of liquid water.
  • Navigation and Topography Cameras (NaTeCam) With 2048 × 2048 resolution, NaTeCam is used to construct topography maps, extract parameters such as slope, undulation and roughness, investigate geological structures, and conduct comprehensive analysis on the geological structure of the surface parameters.

Among the six scientific instruments, RoPeR works during roving; MarSCoDe, MSCam and NaTeCam work when being stationary; RoMAG and MCS work both when moving or still.[15]

Other instruments include:

  • Remote Camera A small camera dropped by the rover to take photos of the rover and the lander on 1 June 2021. Captured images are transferred to the rover via Wi-Fi.[39][22]

Plan

The rover had a planned operational lifetime of 90 sols. Originally, every three sols were defined as one operation period. The basic process of each operation period was:[15]

  • Sol 1: NaTeCam captures images on Martian surface for analysis and operations planning.
  • Sol 2: Each payload performs scientific exploration.
  • Sol 3: The rover moves towards target location. RoMAG and MCS collect data when roving.

Acquired data is downlinked each sol. The data will be processed by teams in CNSA during an official 5–6 months' proprietary period before being released to the scientific community.[15]

In July 2021, the designer of Tianwen-1 orbiter disclosed that due to Zhurong's better-than-expected performance, the original three-day period has been merged into one, accelerating its exploration process.[40]


Map of Mars
Interactive image map of the global topography of Mars, overlaid with the position of Martian rovers and landers. Coloring of the base map indicates relative elevations of Martian surface.
Clickable image: Clicking on the labels will open a new article.
(   Active •   Inactive •   Planned)
Bradbury Landing
Deep Space 2
Mars Polar Lander
Perseverance
Schiaparelli EDM
Spirit
Viking 1
  • The Zhurong rover and Tianwen-1 lander as seen by MRO on 11 June 2021.
    The Zhurong rover and Tianwen-1 lander as seen by MRO on 11 June 2021.

See also

Wikimedia Commons has media related to Zhurong rover.

References

  1. ^ 耿言; 李佳威 (1 January 2021). "元旦问候——国家航天局发布天问一号探测器传回图像". {{cite web}}: |archive-date= requires |archive-url= (help)
  2. ^ Myers, Steven Lee; Chang, Kenneth (14 May 2021). "China's Mars Rover Mission Lands on the Red Planet". The New York Times. Retrieved 16 May 2021.
  3. ^ Woo, Ryan (15 May 2021). "China completes historic Mars spacecraft landing". Reuters. Retrieved 16 May 2021.
  4. ^ Zhao, Lei (22 May 2021). "China's Zhurong rover moves onto Martian surface to begin scientific operations". China Daily. Archived from the original on 22 May 2021. Retrieved 22 May 2021.
  5. ^ ""祝融号"荣登榜首！中国首辆火星车全球征名投票结束". Hunan Today (in Chinese). 2 March 2021. Archived from the original on 24 April 2021.
  6. ^ Cui, Xia; Xu, Jing; Li, Chen; Cai, Jinman (24 April 2021). Qiu, Jing (ed.). "定了！"祝融号"——中国首辆火星车有名字了！" [Deal! "Zhurong"—China's first Mars rover has a name!]. CCTV News (in Chinese). Retrieved 30 April 2021.
  7. ^ Brown, Mark (7 February 2012). "Programming glitch, not radiation or satellites, doomed Phobos-Grunt". Wired UK. Archived from the original on 10 February 2012. Retrieved 26 February 2012.
  8. ^ Wei, Yan; Ma, Li, eds. (11 November 2014). "高清：中国火星探测器首秀 火星车神似"玉兔"". People's Daily (in Chinese). Retrieved 7 June 2021.
  9. ^ Zhao, Lei (23 April 2016). "Probe of Mars set for 2020". China Daily. Archived from the original on 23 April 2016. Retrieved 22 May 2021.
  10. ^ "China shows first images of Mars rover, aims for 2020 mission". Reuters. 23 August 2016. Retrieved 7 June 2021.
  11. ^ Zhu, Yan; Bai, Yunfei; Wang, Lianguo; Shen, Weihua; Zhang, Baoming; Wang, Wei; Zhou, Shengyu; Du, Qingguo; Chen, Chunhong (December 2017). "中国首次火星探测工程有效载荷总体设计" [Integral Technical Scheme of Payloads System for Chinese Mars-1 Exploration]. Journal of Deep Space Exploration (in Chinese). 4 (6): 510–514, 534. doi:10.15982/j.issn.2095-7777.2017.06.002.
  12. ^ 官宣 | 中国首次火星探测任务名称和图形标识正式发布 (in Chinese). China National Space Administration. 24 April 2020. Retrieved 22 May 2021 – via Bilibili.
  13. ^ Zhao, Lei (24 April 2020). "China's first Mars mission named Tianwen 1". China Daily. Archived from the original on 25 January 2021. Retrieved 22 May 2021.
  14. ^ "China's first Mars rover named Zhurong". Xinhua News Agency. 24 April 2021. Retrieved 24 April 2021.
  15. ^ a b c d e f Li, Chunlai; Zhang, Rongqiao; Yu, Dengyun; Dong, Guangliang; Liu, Jianjun; Geng, Yan; Sun, Zezhou; Yan, Wei; Ren, Xin; Su, Yan; Zuo, Wei; Zhang, Tielong; Cao, Jinbin; Fang, Guangyou; Yang, Jianfeng; Shu, Rong; Lin, Yangting; Zou, Yongliao; Liu, Dawei; Liu, Bin; Kong, Deqing; Zhu, Xinying; Ouyang, Ziyuan (June 2021). "China's Mars Exploration Mission and Science Investigation". Space Science Reviews. 217 (4): 57. Bibcode:2021SSRv..217...57L. doi:10.1007/s11214-021-00832-9.
  16. ^ Jones, Andrew (23 July 2020). "Tianwen-1 launches for Mars, marking dawn of Chinese interplanetary exploration". SpaceNews. Retrieved 23 July 2020.
  17. ^ Jones, Andrew (10 February 2021). "China's Tianwen-1 enters orbit around Mars". SpaceNews. Retrieved 21 May 2021.
  18. ^ Jones, Andrew (14 May 2021). "China's Zhurong Mars rover lands safely in Utopia Planitia". SpaceNews. Retrieved 21 May 2021.
  19. ^ Amos, Jonathan (19 May 2021). "China on Mars: Zhurong rover returns first pictures". BBC News. Retrieved 21 May 2021.
  20. ^ "China's Mars rover drives across planet a week after landing". The Guardian. Associated Press. 22 May 2021. Retrieved 23 May 2021.
  21. ^ a b Webb, Sara; Allen, Rebecca (18 May 2021). "On its first try, China's Zhurong rover hit a Mars milestone that took NASA decades". The Conversation. Retrieved 23 May 2021.
  22. ^ a b "天问一号探测器着陆火星首批科学影像图揭幕". cnsa.gov.cn (in Chinese). China National Space Administration. 11 June 2021. Retrieved 12 June 2021.
  23. ^ An, Puzhong; Wang, Lingshuo (28 June 2021). Liu, Shangjing (ed.). "国家航天局发布天问一号任务着陆和巡视探测系列实拍影像". mod.gov.cn (in Chinese). Ministry of National Defense of the People's Republic of China. Retrieved 28 June 2021.
  24. ^ Zhang, Rachel (12 July 2021). "China's Zhu Rong rover zooms in on rocks in Mars space mission". South China Morning Post. Retrieved 12 July 2021.
  25. ^ ""祝融号"近距离"看"降落伞与背罩". cnsa.gov.cn (in Chinese). China National Space Administration. 16 July 2021. Retrieved 21 July 2021.
  26. ^ Jones, Andrew (15 July 2021). "China's Zhurong Mars rover visits own parachute". SpaceNews. Retrieved 21 July 2021.
  27. ^ "天问一号任务着陆和巡视探测系列实拍影像发布". cnsa.gov.cn (in Chinese). China National Space Administration. 27 June 2021. Retrieved 27 June 2021.
  28. ^ Xu, Jing; Tao, Jiashu (11 July 2021). Ye, Pan (ed.). ""祝融号"火星车行驶超400米". China News Service (in Chinese). CCTV News. Retrieved 11 July 2021.
  29. ^ Wang, Mengmeng, ed. (18 July 2021). "祝融号火星车行驶里程突破509米" (in Chinese). Xinhua News Agency. Retrieved 22 July 2021.
  30. ^ "Chinese rover Zhurong captures new unpublished images of Mars". Newsy Today. 3 August 2021. Retrieved 30 August 2021.
  31. ^ Jiao, Peng, ed. (6 August 2021). "祝融号累计行驶里程突破800米" (in Chinese). Xinhua News Agency. Retrieved 8 August 2021.
  32. ^ a b "China's rover travels over 1 km on Mars". China Daily. Xinhua News Agency. 23 August 2021. Retrieved 30 August 2021.
  33. ^ Jones, Andrew. "At Mars, China's Tianwen 1 orbiter and Zhurong rover are back in action after a radio blackout". www.space.com. Retrieved 7 December 2021.
  34. ^ a b c Zou, Yongliao; Zhu, Yan; Bai, Yunfei; Wang, Lianguo; Jia, Yingzhuo; Shen, Weihua; Fan, Yu; Liu, Yang; Wang, Chi; Zhang, Aibing; Yu, Guobin; Dong, Jihong; Shu, Rong; He, Zhiping; Zhang, Tielong; Du, Aimin; Fan, Mingyi; Yang, Jianfeng; Zhou, Bin; Wang, Yi; Peng, Yongqing (2021). "Scientific objectives and payloads of Tianwen-1, China's first Mars exploration mission". Advances in Space Research. 67 (2): 812–823. Bibcode:2021AdSpR..67..812Z. doi:10.1016/j.asr.2020.11.005. ISSN 0273-1177.
  35. ^ "为天问一号装上"会打电话的黑匣子"". 人民网. 17 May 2021. Retrieved 31 August 2021.
  36. ^ Jones, Andrew (29 March 2021). "Here's What You Need to Know About China's Mars Rover". IEEE Spectrum. Retrieved 19 May 2021.
  37. ^ Zhou, Bin; Shen, Shaoxiang; Ji, Yicai; Lu, Wei; Zhang, Feng; Fang, Guangyou; Su, Yan; Dai, Shun (2016). The subsurface penetrating radar on the rover of China's Mars 2020 mission. 2016 16th International Conference on Ground Penetrating Radar (GPR). Hong Kong, China. pp. 1–4. doi:10.1109/ICGPR.2016.7572700. S2CID 306903.
  38. ^ Jones, Andrew (22 July 2020). "China raises the stakes with second Mars attempt". SpaceNews. Retrieved 1 July 2021.
  39. ^ 火星之后我们会去哪里？| 《火星来了》第三季第⑨集 (in Chinese). China National Space Administration. 11 June 2021. Retrieved 11 June 2021 – via Bilibili.
  40. ^ Yu, Zhanyi (14 July 2021). Li, Yusu (ed.). "专访天问一号火星环绕器总体主任设计师：未来将把火星表面样品带回地球" (in Chinese). China News Service. Retrieved 21 July 2021.
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