Tag: China

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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Long March-8 2nd stage engine passes engine test

8:31 am

The new colonial movement: The second stage engine for China’s new Long March-8 rocket has successfully passed its engine tests.

Developed by the CASC [China Aerospace Science and Technology Corporation, China’s equivalent to NASA], the Long March-8 rocket is a new type of rocket that uses module design and can be prepared in a short time, making it competitive for commercial launch.

The first stage of the Long March-8 rocket is similar to that of the Long March-7 rocket and the second stage rocket is similar to the third stage of the Long March-3A rocket. It has a payload capacity of 5 tonnes to sun-synchronous orbit and 2.8 tonnes to geostationary transfer orbit.

This payload capacity is about a fourth that of the Falcon 9, but because the weight and size of satellites is shrinking, that smaller capacity might actually be an advantage. There is less need for the larger rockets in the commercial unmanned satellite industry, so for China to build a new smaller rocket that can be launched for less, even though it is not reusable, gives them a route for competing with SpaceX’s reuseability.

They hope to launch 10 to 20 times per year, beginning next year.

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China launches Earth resource satellite

8:45 am

Using its Long March 4C rocket China yesterday successfully launched Gaofen-12, a remote sensing satellite designd to study Earth resources.

The leaders in the 2019 launch race:

27 China
18 Russia
11 SpaceX
7 Europe (Arianespace)

China now leads the U.S. 27 to 23 in the national rankings.

The launch schedule remains very busy, with a Rocket Lab launch set for early tomorrow and two launches to ISS (a Dragon and Progress) scheduled next week. In fact, seventeen launches are tentatively listed for launch in December, which would be once every other day. Several are unlikely, but regardless December will be a very busy month in the launch industry.

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China unfolds Dutch radio antennas on lunar relay satellite

9:48 am

Chinese engineers have unfolded and activated the Dutch radio antennas on Queqiao, their lunar relay satellite orbiting the Moon, an action that had been delayed because the lander Chang’e-4 and rover Yutu-2 had both exceeded their nominal mission on the surface.

The Chinese satellite was previously mainly seen as a communications satellite. However, the Chinese moon mission has by now achieved its primary goals. Consequently, the Chinese have redefined the satellite to be a radio observatory. As such, the Netherlands-China Low Frequency Explorer is the first Dutch-Chinese space observatory for radio astronomy.

Marc Klein Wolt, Managing Director of the Radboud Radio Lab and leader of the Dutch team, is happy: “Our contribution to the Chinese Chang’e 4 mission has now increased tremendously. We have the opportunity to perform our observations during the fourteen-day-long night behind the moon, which is much longer than was originally the idea. The moon night is ours, now.”

If Queqiao is now dedicated to being a radio antenna full time during the lunar night, I wonder if this means the Chinese are shutting down Chang’e-4 and Yutu-2. Up to now both spacecraft have only operated during the lunar night, which suggests that was the only time they could relay data. It is possible that data relay could take place at other times, and that the lander and rover can function autonomously, but I have my doubts.

Both Chang’e-4 and Yutu-2 functioned for twelve lunar nights, four times longer than planned, so shifting gears on Queqiao to do radio astronomy is not unreasonable. Unfortunately, the lack of transparency from China leaves us in the dark about the fate of Chang’e-4 and Yutu-2.

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Sweeping victories for pro-democracy protesters in Hong Kong elections

10:27 am

Good news: In elections yesterday in Hong Kong, pro-democracy candidates won a landslide victory, capturing control of 17 of 18 local councils.

Some 2.94 million people voted in the election, compared with 1.4 million in 2015.

Pro-democracy candidates won close to 60% of the total vote on Sunday, but achieved a landslide in terms of seats because of the first-past-the-post system, local media report. Pro-democracy contenders were victorious in 347 of the 452 district council seats up for grabs; pro-Beijing candidates won 60 seats; while independents – many of them pro-democracy – got 45, according to the South China Morning Post.

In the last election four years ago, pro-Beijing councillors won 298 seats, but the distribution of these seats meant they took control of all 18 district councils.

The official response from the China-appointed leader of the Hong Kong Special Administrative Region (HKSAR), Carrie Lam, was somewhat conciliatory:

After the social unrest in the past five months, I firmly believe that the vast majority of the public would share my wish for the peaceful, safe and orderly situation to continue.

The HKSAR Government respects the election results. There are various analyses and interpretations in the community in relation to the results, and quite a few are of the view that the results reflect people’s dissatisfaction with the current situation and the deep-seated problems in society. The HKSAR Government will listen to the opinions of members of the public humbly and seriously reflect.

Without doubt these results make it difficult for China to use military force on Hong Kong. The elected leadership throughout all but one district will oppose and stymie such actions. To make it happen the Chinese will literally have to arrest everyone.

In a sense, Hong Kong is becoming the West Berlin of China. It is now a path for ordinary Chinese citizens dissatisfied with communist rule to see another option. For totalitarian regimes, this is never a good thing, as when compared to free societies they never do better.

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Home destroyed by Long March 3B 1st stage

8:27 am

It appears from a number of twitter-type sources coming from China that the spent first stage of the Long March 3B rocket that successfully launched two GPS-type satellites this weekend crashed onto a house, destroying it.

Video footage emerged on Chinese social media shortly after launch showing the apparent destruction of a rural building. Flames are seen within the building along with fumes from residual propellant rising from the booster wreckage.

…The first stage and four side boosters of the Long March 3B use a toxic hypergolic propellant combination of hydrazine and nitrogen tetroxide.

There have so far been no state media reports on the incident. The footage and social media comments suggest the owners returned home following standard evacuation ahead of launch.

According to other such reports, the home-owners will be compensated, but this is not confirmed.

Regardless, because of China’s effort to increase its launch rate, launches coming from its inland spaceports are either going to develop controlled landing for the expendable stages or will cease. The damage both to their own citizens as well as the bad press these crashes garner are aspects that the Chinese government will want to avoid, with the bad press likely its greater concern.

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

9:29 pm

Chinese engineers have reactivated both their lunar lander, Chang’e-4, and its rover, Yutu-2, for their twelve lunar day on the far side of the Moon.

The lander woke up at 5:03 p.m. Thursday (Beijing Time), and the rover, Yutu-2 (Jade Rabbit-2), awoke at 0:51 a.m. the same day. Both are in normal working order, according to the Lunar Exploration and Space Program Center of the China National Space Administration.

No word on where Yutu-2 will be sent over then next two weeks.

Posting was light during the day today because Diane and I were on a hike that I needed to do for the upcoming planned second edition of my hiking guidebook, Circuit Hikes of Southern Arizona. My boss (me) allowed me to go, since this hike was not pure pleasure, but reconnaissance for one of my books.

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Lunar Reconnaissance Orbiter locates crashed Chinese orbiter

9:00 am

Before and after images showing Longjiang-2 impact site

Lunar Reconnaissance Orbiter (LRO) has located the Chinese microsat lunar orbiter Longjiang-2, which was sent to impact the Moon in August 2019 after it completed its technology demonstration mission.

The image above shows the before and after of the location, with the satellite’s remains visible as indicated by the arrow.

Through a careful comparison of pre-existing NAC images, the LROC team was able to locate a new impact crater (16.6956°N, 159.5170°E, ±10 meters), a distance of only 328 meters from the estimated site! The crater is 4 meters by 5 meters in diameter, with the long axis oriented southwest to northeast. Based on proximity to estimated crash coordinates and the crater size, we are fairly confident that this new crater formed as a result of the Longjiang-2 impact.

The picture of the impact site might not be very impressive, but remember, this satellite only weighed about a hundred pounds. The engineering however is impressive, on all counts. First, the Chinese built a tiny cubesat that reached lunar orbit and operated there for more than a year, during which it even took a picture of the Earth. Second, the engineering team of LRO was able to find this tiny impact site for such small spacecraft in less than four months.

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Second Kuaizhou-1A launch in less than a week

8:03 am

The new colonial movement: China today successfully completed its second Kuaizhou-1A launch in four days, placing two communications satellites into orbit.

In just a little more than a four day period, from the very same pad, with the very same launch team and launch truck, China has launched yet another Kuaizhou-1A rocket carrying satellites into orbit.

…The Kuaizhou-1A is a 4 stage, mostly solid fuel powered launch vehicle developed by China Aerospace Science and Technology Corporation (CASIC) and commercialized by the China Space Sanjiang Group Corporation (also known as Expace Corporation).

Promoted by CASIC as being high reliability, high precision and low cost, the launch vehicle can send a 200 kg payload into a 700 km altitude sun-synchronous orbit. The vehicle is possibly based on the road-mobile DF-21 missile, with two additional solid fuel upper stages and a re-startable liquid fuel upper stage. It was designed with the goal to provide an easy to operate quick-reaction launch vehicle, that can remain in storage for long periods and to provide launch missions on short notice.

The leaders in the 2019 launch race:

25 China
17 Russia
11 SpaceX
6 Europe (Arianespace)

In the national rankings, China widened its lead over the U.S. to 25 to 23.

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China unveils Mars lander during landing simulation test

9:44 am

The new colonial movement: China today unveiled to the international press its first prototype Mars lander, showing it attempting a simulated controlled descent on a gigantic test stand.

The demonstration of hovering, obstacle avoidance and deceleration capabilities was conducted at a site outside Beijing simulating conditions on the Red Planet, where the pull of gravity is about one-third that of Earth.

China plans to launch a lander and rover to Mars next year to explore parts of the planet in detail.

This is the first time I have heard anything about China sending a lander/rover to Mars in 2020. Previously the reports had discussed only sending an orbiter.

I have embedded video of the test below the fold. It shows the prototype hanging by many wires from the test stand, then dropping quickly, with its engine firing, before stopping suddenly, followed by an engine burst. While impressive, it did not strike me that China is even close to sending this spacecraft to Mars. The test only proved the spacecraft’s ability to do some maneuvering during descent. It did not show that it could land.

That the project’s designer said that landing would take “about seven minutes” also suggests that they are copying the techniques used by JPL to land Curiosity. Considering that JPL’s computers have been repeatedly hacked, including some hacks identified as coming from China, it would not surprise me if China has simply stolen those techniques.

I still expect them to launch an orbiter to Mars in 2020. Whether they also send a lander and rover remains to be seen.
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