Tag: China

Chinese scientists publish radar results from Chang’e-4 lander

10:13 am

Layers as seen below ground by Chang'e-4 radar

The new colonial movement: Chinese scientists today published their first ground-penetrating radar results from their Chang’e-4 lander on the far side of the Moon.

Using a ground-penetrating radar instrument on Chang’e-4, researchers have found that the rover is likely sitting on different layers of ejecta—debris from multiple impacts over time that rained down at high velocities to blanket the lunar surface and now fill the crater. “[We] see a very clear sequence of [layers],” says Elena Pettinelli of Roma Tre University in Italy, one of the paper’s co-authors.

The rover’s radar instrument was able to penetrate up to 40 meters below the surface of the moon, more than twice the distance achieved by its predecessor, the Chang’e-3 mission, which landed on the lunar near side in December 2013. Data from the latest mission show three distinct layers beneath the rover: one made of lunar regolith, or soil, down to 12 meters; another made of a mix of smaller and larger rocks down to 24 meters; and a third with both coarse and fine materials extending the rest of the 40-meter depth.

The figure to the right comes from the paper [pdf] Though the layers have not been dated, their differences suggest different past events in the formation of this surface.

These results are excellent, but they also have many uncertainties. Radar can tell you a lot, but the only way you can really ever know anything about what’s below ground is to go there and actually do some digging.

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Yutu-2 finds rocks that appear young

7:29 am

Yutu-2 has found a cluster of small rocks that appear relatively young, with little erosion.

The rocks also also appear as if they came from another place on the Moon.

Closer inspection of the rocks by the rover team revealed little erosion, which on the moon is caused by micrometeorites and the huge changes in temperature across long lunar days and nights. That anomaly suggests that the fragments are relatively young. Over time, rocks tend to erode into soils.

The relative brightness of the rocks also indicated they may have originated in an area very different to the one Yutu-2 is exploring.

Youth in this case is very relative. The rocks might be young when compared to the surface on which they sit, but they still could be more than a billion years olf.

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Harvard professor arrested for his work with China

10:01 am

Charles Lieber, the chairman of Harvard’s department of chemistry and chemical biology, has been arrested by the federal government for lying about the work he has been doing for China.

An affidavit accompanying the criminal complaint in Boston further accuses Lieber of making false statements to the National Institutes of Health—a major funder of his research into nanoscale biological interfaces, such as transistors that can interact with intracellular biological machinery—as well as to Harvard itself, about his connections to [China’s] Thousand Talents program and the Wuhan University of Technology.

The arrest occurred very shortly after a Chinese medical student from Harvard was arrested for trying to smuggle cancer research material from a Harvard-affiliated medical center.

More information here. It appears that Lieber did not tell the truth about how much China was paying him for this work, which by the way was a lot of money, $50K per month plus $150K stipend for living in Wuhan while he helped build them a medical lab.

Hat tip Phill Oltmann.

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Maiden flight of China’s Long March 5B rocket targeted for April

9:40 am

The new colonial movement: China is now targeting mid-April for the maiden launch of its Long March 5B rocket, which will place in orbit China’s new manned capsule on its first unmanned demo flight.

The article at the link, from China’s normally reticent state-run press, actually provides a great deal of information. First, it outlines the launch schedule for their space station, using the Long March 5B rocket:

China aims to complete construction of the space station around 2022. According to the CMSA, more than 10 missions are planned in the next three years to complete the construction and master technologies for in-orbit assembly and construction of large complex spacecraft, long-term manned spaceflight in near-Earth space and large-scale space science experiments.

…The space station will be a T shape with the Tianhe core module at the center and a lab capsule on each side. The core module — at 16.6 meters long and 4.2 meters in diameter, with a takeoff weight of 22.5 tonnes — will be the management and control center.

Second, the article confirms that the Long March 5B rocket will be used to launch all of China’s manned missions. This means they are dependent on their biggest and possibly most expensive rocket to make things happen, suggesting that either they will have to go slow or they have made a very big commitment to space. The quote above suggests the latter.

Third, the article reveals that their new manned capsule, which will weigh almost as much as a single station module on either their station or ISS, will be capable of carrying six astronauts, and that the descent module is designed to be reusable.

Finally, they confirm once again that they will also be launching “a large optical telescope” that will fly in formation with their space station. An earlier news article indicated that this telescope would have a mirror 12 meters in diameter, which would be five times bigger than the mirror on the Hubble Space Telescope. That same article however also noted major design issues.

Overall, it appears China is about to step out as a major space power, with capabilities that in many ways will exceed anything from either the U.S. or Russia.

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Russia and China launch satellites

8:33 am

Today both China and Russia successfully placed satellites into orbit. China’s Long March 2D rocket placed four “technology test” satellites into orbit, while Russia used its Soyuz-2 rocket to launch a military communications satellite.

The leaders in the 2020 launch race:

4 China
3 SpaceX
2 Arianespace (Europe)
2 Russia

The U.S. continues to lead China 6 to 4 in the national rankings.

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China’s candidate landing site on Mars

12:19 pm

One candidate landing site for China's first Mars lander/rover
Click for full image.

The image to the right, reduced to post here, was taken by the high resolution camera on Mars Reconnaissance Orbiter (MRO), and provides a close-up of the relative smooth terrain found in the region on Mars that the Chinese have said is one of their prime landing sites for their 2020 Mars rover and lander. According to planetary scientist Alfred McEwen of the Lunar & Planetary Laboratory in Arizona,

There was a presentation at the European planetary & science conference in Geneva last fall, and a Chinese scientist gave an update on their plans and showed this area with the lat-long coordinates. That’s what I’m going on.

McEwen also admits that “there might have been a change since then. I’m not in the loop.” No one outside China really is, as that government remains quite opaque on these matters. They will likely only reveal their final landing site choice as we get closer to launch.

Overview

This location, on the northern lowlands plains of Utopia Planitia, makes great sense however for a first attempt by anyone to soft land on Mars. In fact, in 1976 these plains were the same location that NASA chose for Viking 2, for the same reasons. (The Viking 2 landing site was to the northeast of the Chinese site, just beyond the right edge of the overview map) While there are plenty of craters and rough features, compared to most of Mars’s surface, Utopia could be considered as smooth as a bowling ball.

Even so, a look at the full image shows that there are numerous features nearby that would be a threat for any robotic lander. McEwen notes,
» Read more

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Coronavirus update

10:40 am

This article about the coronavirus epidemic (the virus is now officially dubbed Covid-19) focuses initially on how the Chinese are even quarantining bank notes in their effort to stem the disease’s spread.

I instead found this quote farther down the page much more significant:

More than 1,380 people with the virus are now confirmed to have died and more than 64,400 have been infected in at least 28 countries and regions.

The death rate of the disease, even as it has grown, remains about 2%. While tragic, this number suggests this hardly has the makings so far of a worldwide catastrophe. If anything, it appears to be about as deadly as the flu, which isn’t something to take lightly but also does not warrant any need for panic or desperation. The flu in the 2017-2018 season in the U.S. infected an estimated 45 million, killing about 61,000, a far lower death rate but impacting far more people. Like the flu, Covid-19 appears to be more deadly to older patients.

This epidemic needs to be taken seriously, but it so far does not justify any panic.

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The impact of coronavirus on China’s space industry

10:15 am

Link here. The focus when discussing the epidemic, which continues to grow, should certainly not be on how it is slowing China’s space industry. At the same time, any slow down in their space effort will give us a good indicator on how the virus is effecting their entire economy.

Anyway, it appears, at least as this moment, that the biggest effect in space is the halt of operations for the Kuaizhou smallsat rocket.

Expace, a launch service provider for solid-propellant Kuaizhou rockets, has temporarily halted work due to its proximity to the epicenter of the outbreak. A new Kuaizhou-11 rocket, larger than the Kuaizhou-1A currently in service, was reportedly scheduled for a test flight late February.

Expace is situated in the Wuhan National Space Industry Base, a hub designed to facilitate commercial space activities. The firm is a spinoff from defense contractor CASIC and its subsidiary, China Sanjiang Space Group. The Kuaizhou launch vehicle series are understood to be derived from missile technology.

Other impacts probably won’t become obvious for months, when we can gauge whether there has been a slow down in Chinese launches below the predicted 40 for 2020.

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Yutu-2 and Chang’e-5 complete 14th lunar day

9:10 am

China’s Yutu-2 rover and Chang’e-5 lander have successfully completed their fourteenth lunar day of operations on the far side of the Moon, and have gone into hibernation.

The report from China’s state-run news agency is, as usual, decidedly uninformative. It is written to make it appear that Yutu-2 traveled 367 meters during this most recent lunar day, when in truth that is the total distance since landing. In comparing this total with the total at the end of the thirteenth lunar day, we find that Yutu-2 actually traveled only ten meters.

The report also provided no other information about where the rover went, or what it has been doing, other than saying the rover and its instruments operated as “planned.” The article did not even include a picture, either new or old.

It is a shame that China operates in this secret way. They are doing good stuff on the Moon. If they touted it proudly to the world, in as much detail as possible, they would do themselves far more good.

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Coronavirus update

9:35 am

Link here. In the past five days the number of people known to be infected has grown from about 450 to now more than 1,400, with deaths rising to 41 total. (The rate of deaths to those infected however has dropped, from 5% to less than 1%.) Also, a very small number of cases have been found in other countries throughout the world, limited so far to people who had recently been in the region of China with the most infections.

How serious is this epidemic? The rise in cases in only a week is concerning for sure, as very quickly the numbers are beginning to match the SARS epidemic in 2002-2003, which took a year to get to 8,000 infected. The so-far low death rate however suggests the disease is manageable.

The situation in China however is very serious. They have locked down regions with populations in the multi-millions, and the number of cases might soon strain their health system. Worse, we do not know if the numbers the non-transparent communist government is posting are accurate. There have been numerous rumors all week that the infection count is far higher than what has been publicly revealed. This could be true, or not. The rumors exist because no one trusts the communists to allow the truth to be published.

At the moment it still appears to me that, at least outside of China, the situation is under control. Whether it remains that way we can only wait and see.

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An update on the new virus outbreak originating from China

9:51 pm

Link here. The numbers of people so far infected is hardly gigantic, less than 450 worldwide, with almost all confined to one province in China.

You can also find out some general information about this particular virus as well as other related viruses, such as SARS and MERS, in this separate article. All are far less threatening that press reports make them appear. For example, SARS only infected 8,000 people total, killing a little less than 10% of those infected.

This new virus appears so far to be even less deadly, with nine deaths total, about 5%.

While under no condition should this outbreak be ignored or poo-pooed, it is very important to recognize that, at least so far, it is hardly an epidemic that will wipe out civilization. This could change with time, but I doubt it.

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Prototypes of China’s core space station module and new manned spacecraft arrive at launch site

9:06 am

The new colonial movement: Prototypes of China’s core space station module and its new upgraded manned capsule have been delivered to the Long March 5B launch site.

The space station module will be used to test the installation and launch procedures for launching the actual module on the Long March 5B rocket. The manned capsule will be sent into orbit unmanned this spring on the Long March 5B to test both the rocket and the capsule, prior to human operations. This detail from the short article however is worth noting:

The new-generation manned spacecraft is 8.8 meters long and has a takeoff weight of 21.6 tonnes. It will be used for transporting crew to the space station and to conduct China’s future manned lunar missions.

Apparently in upgrading its Shenzhou manned spacecraft China has made it 0.3 meters longer and about four tons heavier. In fact, this manned ferry for getting to and from its space station is as heavy as a standard module used on both Mir and ISS. I could be wrong, but if this is the case they will require the Long March 5 or 5B for every manned flight. Since this rocket is large and expensive, it will be difficult to use it for maintaining a frequent launch pace, thus limiting the number of manned missions.

As I said, I could be wrong. Up until now I had assumed that a variant of the Long March 5 would be used to launch the station modules, and the smaller Long March 2F rocket used to ferry astronauts to it (as was done on all previous Chinese manned missions). This could still be the case.

If not, however, China’s space engineers have either put a limit on what they can achieve by overbuilding that manned capsule, or their government has made a major commitment to put a lot of tonnage into orbit. If the latter China’s space program is going to be quite competitive indeed.

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China releases data and images from Yutu-2 and Chang’e-3

9:44 am

Yutu-2 on the far side of the Moon
Click for full image.

The new colonial movement: To celebrate the completion of a year on the lunar surface, China has released the bulk of the data and images produced by the lander Chang’e-3 and the rover Yutu-2.

The link includes a nice gallery of images. I especially like the image to the right, cropped to post here. It shows Yutu-2 moving away from Chang’e-3 early in the mission. It also shows how truly colorless the Moon is. The rover proves this is a color image, but if it wasn’t in the shot you’d have no way of knowing.

And then there is that pitch black sky. I wonder what’s behind it.

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China now predicts more than 40 launches in 2020

9:13 am

The new colonial movement: China has increased its launch prediction for 2020 from 30 to more than 40 launches.

The key planned achievements:

The highlights of the space activities include the launch of China’s first Mars probe, the Chang’e-5 lunar probe, which is expected to bring moon samples back to Earth, the final step of China’s current lunar exploration program, as well as the completion of the BeiDou Navigation Satellite System constellation.

Three new types of carrier rockets including the Long March-5B, Long March-7A and Long March-8 will make their maiden flights in 2020.

It sure looks like 2020 is shaping up to possibly be the most spectacular year for space since Sputnik.

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Yutu-2 completes 13th lunar day

9:02 am

China’s Yutu-2 lunar rover and its lander Chang’e-4 have completed their thirteenth lunar day on the far side of the Moon and have been placed in sleep mode.

During the twelve lunar day the rover traveled about 12 meters, or about 40 feet.

The rover has found materials from deep inside the moon that could help unravel the mystery of the lunar mantle’s composition and the formation and evolution of the moon and the earth. Using data obtained by the visible and near-infrared spectrometer installed on Yutu-2, Chinese scientists found that the lunar soil in the landing area of the Chang’e-4 probe contains olivine and pyroxene which came from the lunar mantle deep inside the moon.

Due to the complicated geological environment and the rugged and heavily cratered terrain on the far side of the moon, the rover drives slowly but steadily and is expected to continue traveling on the moon and make more scientific discoveries.

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The state of the global rocket industry in 2019

12:31 pm

With 2019 ending, it is time once again (as I did for 2016, 2017, and 2018) to review the trends in the global launch industry for the past year.

Below is my updated graph, showing the launch numbers for 2019 as well as for every year going back to 1990, just before the fall of the Soviet Union. That range I think covers all recent trends, while also giving some perspective on what happened in 2019.

The graph is worth reviewing at length, as it not only gives a sense of recent trends, it also summarizes well the history of the entire global space industry during the past thirty years. For example, it shows the transition in the U.S. in the past two decades from government-owned launchers to private rockets, a change that has revitalized the American space industry in more ways than can be counted.
» Read more

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China has a shortfall of jet engines

4:28 pm

Apropos of the engine problems on the Long March 5, it is reported today that China has a serious manufacturing shortage of the jet engines it needs for its new stealth fighters and bombers.

Aviation website Alert 5 spotted a stock-exchange filing by the Hebei subsidiary of China’s Central Iron & Steel Research Institute. The filing including production projections for military engines for the next decade, and reveals some startling shortfalls. Production and development gaps could result in the latest Chinese warplanes flying with older engine models, including imported Russian motors that might be underpowered and unreliable. The mismatch between airframes and engines could be a drag on the overall performance of Chinese military aircraft.

Perhaps the biggest shortfall is in the production of WS-15s and WS-19s, the custom motors respectively for J-20 stealth fighters and FC-31 export stealth fighters. “Data provided by Hebei Cisri Dekai Technology Co. Ltd. shows a maximum of only five WS-15 and WS-19 engines each year from 2020 ‘til 2026,” Alert 5 reported.

Apparently China will be flying these jets and bombers using inadequate Russian engines for the next five to eight years, as the country’s own industry seems unable to make them.

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Yutu-2 sets new longevity record for lunar rover

8:53 am

China’s Yutu-2 lunar rover has now set a new longevity record for any rover on the Moon, beating the 10.5 month record set by the Soviet Union’s Lunokhod 1 rover in 1970-1971.

Lunokhod 1 traveled about 6.5 miles, or about 34,000 feet, during its operation. Chinese engineers have been more cautious, moving Yutu-2 only about 1,132 feet in the same time period.

The Chinese rover is still operating, though relatively little data has been released from it. At the moment it has been placed in its hibernation mode as it makes it through its twelfth lunar night.

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China launches two more Beidou GPS-type satellites

8:56 am

The new colonial movement: China today used its Long March 3B rocket to launch two more Beidou GPS-type satellites.

With this launch China has successfully matched its predicted number of launches for 2019, a number that it should exceed with several more launches scheduled before the end of the year.

The leaders in the 2019 launch race:

30 China
20 Russia
12 SpaceX
7 Europe (Arianespace)

China now leads the U.S. in the national rankings 30 to 25. These numbers should change later today, as SpaceX has a commercial launch scheduled.

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New info on Long March 5 launch failures

9:19 am

An article in the English Chinese press today about the upcoming third launch of China’s Long March 5 rocket revealed some new information about the failures of that rocket during its first two test flights.

On its maiden mission in November 2016, the rocket failed to reach the speed required for the early phase of the flight; still, extra booster fuel burned in the final stage lifted its satellite cargo into orbit and allowed China to declare the trip a success.

In the second flight a few months later, though, the main engine died minutes after take-off, and the rocket plunged into the sea.

I have tried to read every iota of information released about the first two launches of the Long March 5 in order to figure out what went wrong during its second launch. At no time however had I ever come across any report that described any launch problems during its first flight. The Chinese always touted that first flight as a complete success, with no problems.

We now learn that the first stage during that first launch was under-powered, a problem that was not dealt with before the second launch, resulting in the complete failure of that second launch.

This is the typical behavior one sees in a government-run top-down program. Rather than bluntly address problems to fix them, even if it means someone will be embarrassed, management acts to protect itself, hiding problems so as to avoid blame. The result is always more failures.

As long as China’s economy is booming and providing its government with lots of cash for its space program, such problems can be papered over and even overcome. The second however that economy begins to falter, the program will stumble, the hidden problems acting like an avalanche to overwhelm everything.

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Scientists reject discovery of biggest known black hole

9:20 am

The uncertainty of science: In three new papers published this week astronomers have found that the announced discovery in early December of the biggest super-massive black hole ever found, 70 times the mass of the Sun, does not hold up.

In a recent study (a peer-reviewed study published Nov. 27), a team of scientists reported the discovery of the binary system LB-1, which contains a star and, according to the findings, a black hole companion 70 times the mass of our sun. This was major news, a stellar-mass black holes (black holes formed by the gravitational collapse of a star) are typically less than half that massive. But while the study, led by Jifeng Liu, of the National Astronomical Observatory of China (NAOC) of the Chinese Academy of Sciences, was exciting, it was also wrong.

Three new papers came out this week that reexamined the findings from Liu’s study, and these studies say that LB-1’s black hole isn’t actually all that massive.

The new papers find that a closer look at the data finds that it wasn’t doing what the initial researchers thought.

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Two Chinese Kuaizhou-1A launches within six hours

9:20 am

The new colonial movement: China today successfully completed two separate Kuaizhou-1A launches, placing in orbit seven total smallsats and doing it within a space of only six hours.

China launched two orbital missions from the Taiyuan Satellite Launch Center within six hours of each other, orbiting a total of seven satellites. The launches, using mobile pads, saw two Kuaizhou-1A rockets heading into space on Saturday at 2:55 UTC and 8:52 UTC.

The first Kuaizhou-1A rocket, serial number Y2, orbited the Jilin-1 Gaofen-2B remote sensing satellite for the Jilin-1 constellation.

…Six hours after the first launch, and as was expected by the navigational warnings previously published, a second Kuaizhou-1A launch vehicle, serial number Y12, had already been displaced to the launch site, but from a different pad. Analysis of the images available from the second launch seems to indicate that launch took place from a location within the Launch Complex 16 usually used for the Long March-6 launches. Ignition came at 8:52UTC.

The three-stage launch vehicle orbited six satellites.

This achievement is a very big deal. China has demonstrated the ability to launch and then launch again quickly with this military-based mobile launch system. This not only enhances their commercial value, it tells us they have developed a military capability able to put payloads into orbit at almost a moment’s notice.

The leaders in the 2019 launch race:

29 China
19 Russia
12 SpaceX
7 Europe (Arianespace)
6 Rocket Lab

China now leads the U.S. 29 to 25 in the national rankings.

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China to launch 30 times in 2020

12:35 pm

The new colonial movement: According to Chinese officials, China plans to launch 30 times in 2020, maintaining the same pace that they met in 2019.

Zhuang Jingguo, chief engineer of the China Aerospace Science and Technology Corporation (CASC), the country’s man space contractor, told media at the Fifth China International Commercial Aerospace Forum late last month that the state-owned enterprise will launch around 30 rockets next year.

This number is expected to include missions to Mars, the moon, test flights of new launch vehicles, and the completion of the Beidou navigation system. Commercial launch companies will further add to Chinese launch activities.

The article also provides a good overall summary of China’s present space effort, which is extensive and growing.

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Chang’e-4 and Yutu-2 complete 12th lunar day

12:17 pm

Chinese engineers have put both Chang’e-4 and Yutu-2 into dormant mode after completed their twelve lunar day on the far side of the Moon.

The article from the Chinese state-run press provides very little information, other than telling us that Yutu-2 traveled 345 meters, written in a way to imply that was the distance the rover traveled in this last lunar day. I think that is wrong, however. Based on the distances traversed during previous lunar days, and that the rover had traveled a total of 290 meters at the end of its tenth lunar day, I think this new number is the total distance traveled.

The article also does not say what the consequences will be for these two spacecraft now that the priority of their communications relay has shifted from communications to being a radio telescope.

It could be that the consequences will be minor, considering that both spacecraft are in sleep mode during the lunar nights and for high noon of the lunar day. During those periods the relay satellite could be devoted full time to radio astronomy and have no impact on the lander and rover.

Unfortunately China has not said.

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