Tag: 中国探月

#CNSA #ChinaNationalSpaceAdministration #国家航天局 |#BeltAndRoadinitiative #CLEPS #October2020 | #VonKarmanCrater #LunarMission#嫦娥 #Change4 #玉兔#Yutu2 #JadeRabbit waking up to a Lunar morning exploration 565.9 Metres 660 #EarthDays on the #VonKarman #Crater.. From a good night sleep..

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As of 23rd October 2020, The CNSA –China National Space Administration Belt and Road Initiative Lunar Mission on the One Hundred Kilometer diameter Von Karman Crater    Chang’e 4 lander and the “Yutu 2” lunar rover the Chang’e-4 lander and the “Yutu-2” lunar rover Chang’e 4 lander and “Yutu 2” lunar rover usher in As the celestial bodies move, night falls once again on the back of the moon. The Chang’e 4 lander and the “Yutu 2” lunar rover completed the 23rd day of the month. At 21:40 and 12:00 on October 23, they completed the moon night mode setting according to ground instructions and entered moon night sleep. As of today, the Chang’e-4 lander and the “Yutu-2” lunar rover have successfully worked on the back of the moon for 660 earth days, traveling a total of 565.9 meters.

Recent basalt coverage area (red line area) recent basalt coverage area (red line area)

Based on the data of the panoramic camera stitched images and DOM images on the 22nd day, the “Yutu-2” lunar rover travelled to the basalt distribution area and the impact crater area with higher reflectivity during the 23rd day. Both locations are Located northwest of the lunar rover. In this travel route, the infrared imaging spectrometer performed a spectral detection of a rock block with a diameter of about 30 cm. The scientific research team is conducting in-depth research on the detection data. During the 23-month scientific exploration, the lander’s lunar surface neutron and radiation dose detector carried out the world’s first on-site- on-site particle radiation environment detection on the lunar surface, and obtained precious first-hand scientific data. The research results are in Science Advance Journal published.

The installation position of the moon surface neutron and radiation dose detector on the lander The installation position of the moon surface neutron and radiation dose detector on the lander

The moon surface neutron and radiation dose detector can comprehensively measure the total particle radiation dose, neutral particle radiation dose, particle radiation LET spectrum, neutrons, and charged particles on the moon surface. The actual measurement results show that the particle radiation dose rate near the landing zone is 13.2uGy/h(si), the dose equivalent is twice that of the surface of Mars and the interior of the space station, 5 to 10 times of a flight, and 300 times of the surface of the earth (Beijing).

The measured monthly radiation dose (the horizontal axis is Universal Time, the vertical axis are respectively: a total radiation dose rate in silicon (microGray/hour), b. neutral particle radiation dose rate in silicon (microGray) /Hour), c. The charged particle radiation dose rate in silicon (microGray/hour), d. The cosmic ray penetrating particle flux (pieces/square centimeter·hour·radian) measured monthly surface radiation dose (horizontal The axis is Universal Time, and the vertical axis are: a total radiation dose rate in silicon (microGray/hour), b. neutral particle radiation dose rate in silicon (microGray/hour), c. silicon Charged particle radiation dose rate (microGray/hour), d. Cosmic ray penetrating particle flux (pieces/square centimeter·hour·radian)

These field measurement results provide important radiation environment parameters for the follow-up lunar exploration in my country. The load also distinguishes the radiation dose of charged particles and neutral particles, thereby providing more accurate radiation physical quantities, which can serve the radiation protection of future astronauts.

Today in the history of spaceflight on 24th October :

On October 24, 2007, my country’s first lunar exploration satellite, Chang’e-1, was successfully launched by the Long March 3A carrier rocket at the Xichang Satellite Launch Center, opening the glorious course of my country’s lunar exploration project. On November 12, 2008, the full moon image taken by Chang’e-1 was released. On March 1, 2009, the satellite hit the moon in a controlled manner as scheduled. The successful implementation of this mission marked my country’s entry into the world deep space exploration club and established the third milestone of China’s spaceflight after artificial satellites and manned spaceflight.

On October 24, 2014, my country’s first-month high-speed reentry aircraft was launched from the Long March III C-modified II carrier rocket at the Xichang Satellite Launch Center, and it orbited the moon three days later. On November 1, the returner landed in Siziwang Banner, Ulanqab City, Inner Mongolia, China. As a pilot mission of the third phase of the lunar exploration project, it verified the key technology of lunar sampling and returning, laying a solid foundation for lunar sampling and returning.

Schematic diagram of reentry and return test track Schematic diagram of reentry and return test track…

随着天体的运行，夜幕再次降临在月球背面。嫦娥四号着陆器和“玉兔二号”月球车完成第23月昼工作，分别于10月23日21时40分和12时，按地面指令完成月夜模式设置，进入月夜休眠。截至今天，嫦娥四号着陆器和“玉兔二号”月球车已在月球背面顺利工作660个地球日，累计行驶565.9米。

最近玄武岩覆盖区域（红色线条区域）最近玄武岩覆盖区域（红色线条区域）

基于第22月昼全景相机拼接影像、DOM影像等数据情况，“玉兔二号”月球车在第23月昼期间先后向玄武岩分布区域和反射率较高的撞击坑区域行驶，这两个位置均位于月球车西北方向。在此行进路线中，红外成像光谱仪对一直径约为30cm的岩块进行了光谱探测。科研团队正在对探测数据进行深入研究。在23个月昼的科学探测中，着陆器上月表中子与辐射剂量探测仪开展了国际上首次月表实地粒子辐射环境探测，获取了珍贵的第一手科学数据，研究成果在Science Advance期刊发表。

月表中子与辐射剂量探测仪在着陆器上的安装位置月表中子与辐射剂量探测仪在着陆器上的安装位置

月表中子与辐射剂量探测仪可对月表的粒子辐射总剂量、中性粒子辐射剂量、粒子辐射LET谱、中子、带电粒子进行综合测量。实测结果表明，着陆区附近粒子辐射剂量率为13.2uGy/h(si)，剂量当量是火星表面和空间站内部的2倍，一次航班的5到10倍，地球表面（北京）的300倍。

测量到的月表辐射剂量（横轴为世界时，纵轴分别为：a 硅中的总辐射剂量率（微戈瑞/小时），b. 硅中的中性粒子辐射剂量率(微戈瑞/小时)， c. 硅中的带电粒子辐射剂量率(微戈瑞/小时)，d. 宇宙线穿透粒子通量(个/平方厘米·小时·弧度)测量到的月表辐射剂量（横轴为世界时，纵轴分别为：a 硅中的总辐射剂量率（微戈瑞/小时），b. 硅中的中性粒子辐射剂量率(微戈瑞/小时)， c. 硅中的带电粒子辐射剂量率(微戈瑞/小时)，d. 宇宙线穿透粒子通量(个/平方厘米·小时·弧度)

这些实地测量结果为我国后续的月球探测提供了重要的辐射环境参数。该载荷还将带电粒子和中性粒子的辐射剂量进行了区分，由此提供了更加精准的辐射物理量，可服务于未来航天员的辐射防护。

航天史上的今天：

2007年10月24日，我国首颗探月卫星嫦娥一号由长征三号甲运载火箭在西昌卫星发射中心发射成功，开启了我国探月工程的辉煌历程。2008年11月12日，嫦娥一号拍摄的全月球影像图发布。2009年3月1日，卫星按预定计划受控撞月。本次任务的成功实施，标志着我国进入世界深空探测俱乐部，树立了中国航天继人造卫星和载人航天之后的第三个里程碑。

2014年10月24日，我国首个月地高速再入返回飞行器在西昌卫星发射中心由长征三号丙改II型运载火箭发射升空，三日后实现绕月。11月1日返回器在中国内蒙古乌兰察布市四子王旗境内着陆。作为探月工程三期先导任务，验证了月球取样返返回关键技术，为月球采样返回奠定了坚实基础。

再入返回试验轨道示意图再入返回试验轨道示意图

Images and visuals are from Weibo.. ​​​​Also from my own lunar photography @KevinJamesNg 

#CNSA #ChinaNationalSpaceAdministration #国家航天局 |#BeltAndRoadinitiative #CLEPS #September 2020 | #VonKarmanCrater #LunarMission#嫦娥 #Change4 #玉兔#Yutu2 #JadeRabbit making another fun learning Luna exploration 5471.20 Meters more #LunaExploration Summary of more than 630-day scientific with more lunar driving…..

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As of 24th September Thursday 2020, The CNSA –China National Space Administration Belt and Road Initiative Lunar Mission on the One Hundred Kilometer diameter Von Karman Crater    Chang’e 4 lander and the “Yutu 2” lunar rover the Chang’e-4 lander and the “Yutu-2” lunar rover… Chang’e 4 lander and “Yutu 2” lunar rover awakened autonomously and entered the 22nd day of work] Today, the Chang’e 4 lander and “Yutu 2” lunar rover, which have been working on the back of the moon for 630 days…..  In following.. The Chang’e-4 lander and the “Yutu-2” lunar rover will finish the 22nd month day work at 7:30 on September 24 and 23:18 on the 23rd, and complete the moon night mode setting according to ground instructions, and enter moon night sleep. Up to now, Chang’e-4 has spent 630 Earth days on the back of the moon and travelled 547.17 meters cumulatively.

Based on the 21st month day panoramic camera stitched images, DOM images and other data, the “Yutu 2” lunar rover mainly travels during the 22nd month day, successively in the impact crater and reflection about 1.3km northwest of the landing site Areas with higher rates were detected.

Researchers have made use of data such as panoramic camera ring-shot detection, infrared imaging spectrometer calibration detection, and simultaneous detection of lunar radar during driving, and obtained a number of scientific results, which were recently published in the International Journal of Nature Astronomy.

The scientific team conducted in-depth research on the radar detection data and obtained important discoveries about the lunar soil and shallow structures in the landing zone. Based on the characteristics of low-frequency radar signals, as shown in Figure 1, the shallow structure of the landing area is divided into three basic units, from top to bottom there are strong reflection units (unit 1), weak reflection units (unit 2), and medium reflection units. Unit (Unit 3). Combining basic constraints such as regional geology and the spatial distribution of large-scale impact craters, the results of the geological interpretation are as follows: Unit 1 (total thickness of about 130m) is the accumulation of sputtering materials near multiple impact craters (including Finsen, Alder, and von Carmen). Impact craters such as L and L’) and the basalt breccia layer at the bottom; unit 2 (total thickness about 110 m) is a basalt layer with multiple eruptions; unit 3 (thickness not less than 200 m) is Leibniz in the north of the landing zone Spatter from impact craters. The high-frequency radar signal further gives the fine structure of the upper part of the unit 1, as shown in Figure 2, which is characterized by the presence of a 12m thick lunar soil layer on the top, which basically does not contain large rocks, and the bottom is a strip of 22m thick Sputters, they are all projectiles from the Finsen impact crater, with a total thickness of 34m.

Fig.1 The detection profile and interpretation result of the low-frequency channel of the lunar radarFig.1 The detection profile and interpretation result of the low-frequency channel of the lunar radar

    The lunar radar carried by the “Yutu-2” lunar rover can obtain the geological section below the driving path and reveal the layered structure of the underground. Because the lunar radar is directly based on the lunar surface for detection, the reflected signal detected by it has large energy and clear characteristics, and the effect is far better than that of spaceborne radars more than 100km away from the lunar surface. Moreover, due to the use of a frequency much higher than 5MHz of the spaceborne radar, its resolution advantage is also very obvious. The main frequencies of the two channels of the lunar radar are 60MHz and 500MHz, the spatial resolution is 10m and 0.3m, and the detection depth is about 50m and 500m. The high-frequency channel is used to detect the high-resolution structure of the shallow lunar soil and its underlying sputter, and the low-frequency channel is used to detect the layered structure of the deep sputter and basalt.

Figure 2 The detection profile and interpretation result of the high-frequency channel of the lunar radar

The shallow structural profile obtained by the lunar radar shows that the lunar material detected by “Yutu 2” comes from the Finsen impact crater, not from the filling basalt of the von Karman impact crater itself; at the same time, the radar profile also reveals the landing area has experienced multiple impacts, sputtering accumulation and multiple basalt magma eruptions filling. These new discoveries are of great significance for understanding the evolution of the Moon’s South Pole-Aiken Basin, and have an important guiding role for the subsequent exploration and study of the composition and structure of the Moon’s internal material.

嫦娥四号着陆器和“玉兔二号”月球车分别于9月24日7时30分、23日23时18分结束第22月昼工作，按地面指令完成月夜模式设置，进入月夜休眠。截至目前，嫦娥四号已在月球背面度过630个地球日，累积行驶547.17米。

基于第21月昼全景相机拼接影像、DOM影像等数据情况，“玉兔二号”月球车在第22月昼期间主要以行驶为主，先后在距离着陆点西北方向约1.3km的撞击坑和反射率较高的区域进行了探测。

科研人员利用全景相机环拍探测、红外成像光谱仪定标探测、测月雷达行驶过程中同步探测等数据，取得多项科学成果，近期发表在Nature Astronomy国际期刊上。

科学团队对雷达探测数据开展了深入研究，获得了着陆区月壤和浅层结构的重要发现。基于低频雷达信号特征，如图1所示，将着陆区的浅层结构划分为三大基本单元，由上往下依次为强反射单元（单元1）、弱反射单元（单元2）和中等反射单元（单元3）。结合区域地质和大型撞击坑的空间分布等基本约束，地质解译结果如下：单元1（总厚度约130m）为临近多个撞击坑的溅射物堆积（包括芬森、阿尔德、冯·卡门L和L’等撞击坑）和底部的玄武岩角砾层；单元2（总厚度约110 m）为多次喷发的玄武岩层；单元3（厚度不小于200 m）为着陆区北部莱布尼兹撞击坑的溅射物。高频雷达信号进一步给出单元1上部的精细结构，如图2所示，其特征为顶部存在厚达12m的月壤层，基本不含大石块，其下为厚达22m的条带状溅射物，它们均是来自芬森撞击坑的抛射物，总厚度达34m。

图1 测月雷达低频通道的探测剖面及解译结果图1 测月雷达低频通道的探测剖面及解译结果

    “玉兔二号”月球车搭载的测月雷达能够获取行驶路径下方的地质剖面，揭示地下的分层结构。由于测月雷达直接基于月面进行探测，因此，其探测到的反射信号能量大，特征清晰，效果远优于距月面100km以上的星载雷达探测。而且，由于采用远高于星载雷达5MHz的主频，其分辨率优势也十分明显。测月雷达两个通道的主频分别为60MHz和500MHz，空间分辨分别为10m和0.3m，探测深度分别约50m和500m。高频通道用于探测浅部月壤及其下伏溅射物的高分辨结构，低频通道用于探测深部溅射物和玄武岩等分层结构。

图2 测月雷达高频通道的探测剖面及解译结果图2 测月雷达高频通道的探测剖面及解译结果

测月雷达所获取的浅层结构剖面表明“玉兔二号”所探测的月面物质来自于芬森撞击坑，而不是来自冯·卡门撞击坑自身的充填玄武岩；同时，该雷达剖面还揭示了着陆区经历多期次的撞击溅射堆积和多期次玄武岩浆喷发充填。这些新发现对于认识月球南极-艾肯盆地的演化具有非常重要的意义，对于月球内部物质组成和结构的后续探测与研究有重要指导作用。

 

Images and Visuals are from Weibo… 

#CNSA #ChinaNationalSpaceAdministration #国家航天局 |#BeltAndRoadinitiative #CLEPS #September 2020 | #VonKarmanCrater #LunarMission#嫦娥 #Change4 #玉兔#Yutu2 #JadeRabbit making another Luna exploration 520 Meters more #LunaExploration Summary of more than 618-day scientific with more lunar driving…..

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As of 11th September 2020, The CNSA –China National Space Administration Belt and Road Initiative Lunar Mission on the One Hundred Kilometre diameter Von Karman Crater    Chang’e 4 lander and the “Yutu 2” lunar rover the Chang’e-4 lander and the “Yutu-2” lunar rover… Chang’e 4 lander and “Yutu 2” lunar rover awakened autonomously and entered the 22nd day of work] Today, the Chang’e 4 lander and “Yutu 2” lunar rover, which have been working on the back of the moon for 618 days…..

Once again Wake up independently by light, at 5:15 on September 12th and 11:54 on September 11th 2020, ushering in the 22nd day of work…..Based on data such as panoramic camera stitching images and DOM images, the “Yutu-2” lunar rover will drive toward the basalt or impact crater area with high reflectivity during the 22nd day of the month. The current detection point is about 83m from the nearest impact crater, and there is a degenerated impact crater with a diameter of about 160m on the south side of the impact crater of the One Hundred Kilometre diameter Von Karman Crater…..

Has the exploration continues  there is a degenerated impact crater with a diameter of about 160m on the south side of the impact crater. Both locations are located to the northwest of the current detection point. The “Yutu-2” lunar rover will conduct scientific exploration of these two impact craters during the day of this month. At that time, the panoramic camera, infrared imaging spectrometer, and neutral atom detector will be turned on one after another and the moon-measuring radar will simultaneously carry out detection during driving. Related scientific results will be released in time….

 

【“嫦娥”“玉兔”自主唤醒，进入第22月昼工作期】已在月球背面工作618天的嫦娥四号着陆器和“玉兔二号”月球车，再次受光照自主唤醒，分别于9月12日5时15分和9月11日11时54分，迎来第22月昼工作期。“玉兔二号”在第22月昼期间将向玄武岩或反射率较高的撞击坑区域行驶，并对其中两个撞击坑开展科学探测。届时，全景相机、红外成像光谱仪、中性原子探测仪将陆续开机，行驶过程中测月雷达同步开展探测。相关科学成果将及时发布。（来源：中国探月工程）

Images and visuals are from Weibo

#CNSA #ChinaNationalSpaceAdministration #国家航天局 |#BeltAndRoadinitiative #CLEPS #中国探月|#August2020 #VonKarmanCrater #LunarMission #Change4 #Yutu2 Waking up on another Luna trekking Luna with #LunaExploration ….

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On 12th August 2020 – Monday……  The CNSA –China National Space Administration Belt and Road Initiative……On the far side of the moon on the least one hundred Kilometer diameter Von Karman Carter in which, with a new round of dawn, the Chang’e 4 lander and the “Yutu 2” lunar rover ended their moon night dormancy at 14:54 on August 13 and 20:34 on August 12, respectively. Wake up by light and enter the 21st day working period. The working conditions of the two instruments are normal, the energy is balanced, and the exploration journey on the back of the moon continues.

According to the panoramic camera stitched image, DOM image and other data, the “Yutu-2” lunar rover will drive to the basalt or high-reflectivity impact crater area northwest of the current detection point during the daytime work period of this month. At that time, the panoramic camera, infrared imaging spectrometer, and central atom detector will be turned on for detection, and the moon-measuring radar will carry out simultaneous detection during driving……

In addition, the “Yutu-2” lunar rover plans to choose an opportunity to carry out panoramic ring shooting in the higher terrain at the junction of the two impact craters (the edge of the degraded impact crater).

Previous work The preparationally work Launching towards the Dark side of the moon in which to establishment of communication with Queqiao- Known as the Magpie Bridge in which namely relating to the Jin Dynasty story with Cowhearder and Weaver girl in which the Magpie forms a Milky way bridge to  have the lovers to meet together …..  In which is the same way for making that communications relay point with the other side of the moon with Earth… in which Chang’e is the name of the Luna goddess in which relates towards the Mid-Autumn festival…..  in which related to a time in Imperial China History where there was massive famine where it was the weather environment was so unbearable to live in which it relates to it was so hot it felt like ten suns had heated up on Middle Kingdom –China in which a General whom Archery skills where unmatched that he fired his arrows towards nine suns therefore reducing the hot environment…after the events the Archer General Hou Yi was given the  elixir of immortality in which apparent someone was tempting to steal the elixir then Hou Yi wife intervene by eating the pill then she ascend towards the night sky toward the moon with.. in Hou Yi paid tribute to his wife with many offerings to her during the Mid-Autumn festival..

It is the first time that CNSA has sent a lunar rover towards the other side of the moon, also it’s the first time a Space agency has done so… Chang’e four Lunar Rover is the advance version of also its was currently a backup rover to its older sisters… Landing on the far side of the moon, is the proposal Von Karman Crater, with the flat basin Chang’e four mission profile is to measure the lunar surface temperature over during its mission duration, to measure the various chemicals and material compositions on that side of the moon… also the rover acts like a radio astronomy in low frequencies also cosmic ray structure identification or solar weather Coronal Mass Ejection observation between the Sun and Earth..

In which with this mission experience there’s another sister on her way towards the moon in Change5 lunar Rover with a returnable sample launcher spacecraft module in which Change5 Lunar Rover Launch is expected to be launch by 2020.. In which it’ll Data procurement role will be more expansive than her current sister Change4, with more experiments installations onboard to study the Lunar landscape more closely..

在遥远的月球背面，伴随着新一轮的曙光，嫦娥四号着陆器和“玉兔二号”月球车分别于8月13日14时54分和8月12日20时34分结束月夜休眠，受光照自主唤醒，进入第21月昼工作期。两器工况正常，能量平衡，继续月球背面的探索之旅。

根据全景相机拼接影像、DOM影像等数据，“玉兔二号”月球车在本月昼工作期，将向当前探测点西北方向玄武岩或反射率较高的撞击坑区域行驶。届时全景相机、红外成像光谱仪、中心原子探测仪将开机探测，行驶过程中测月雷达开展同步探测。

此外，“玉兔二号”月球车计划在两个撞击坑交界处（退化撞击坑边缘）的地势较高区域择机开展全景环拍。

Images and visuals are from Weibo CNSA China National Space Administration also CLEPS..  China Lunar Exploration Program中国探月…..