Tag: China

China attacks SpaceX, claiming Starlink satellites threaten its space station

9:16 am

China earlier this month submitted a complaint against SpaceX to the UN, claiming that the company’s Starlink satellites have twice forced it to adjust the orbit of its space station to avoid a collusion.

The note said the incidents “constituted dangers to the life or health of astronauts aboard the China Space Station”.

“The U.S. … ignores its obligations under international treaties, posing a serious threat to the lives and safety of astronauts,” Chinese foreign ministry spokesman Zhao Lijian said at a routine briefing on Tuesday.

The story became news today because there was suddenly a flurry of outrage against SpaceX on Chinese social media, responding to Lijian’s statement, with much of it very likely astroturf posts prompted by the Chinese government itself.

This announcement likely signals that China is getting ready to launch the next module to that station. During that launch the large core stage of the Long March 5B rocket will reach orbit, but only for a few days. It will then crash uncontrolled somewhere on Earth. The Chinese government knows it is going to get a lot of bad press because of this fact, and is likely making this complaint to try to excuse its own bad actions.

The two issues however are not the same. Satellite orbits are very predictable, and any maneuvers required by China to avoid Starlink satellites were very routine. Moreover, if necessary SpaceX can adjust its own satellite orbits to avoid a collusion.

The crash of the Long March 5B core stage however is due entirely to a bad design that does not allow for any controlled maneuvers. Once the stage’s engines shut down after delivering the station module into orbit, they cannot be restarted, as designed. The stage must fall to Earth in an unpredictable manner, threatening every spot it flies over during that orbital decay.

At this time the actual launch date for that Long March 5B launch, carrying the next station module, has not been announced. The astronauts on the station just completed their second spacewalk, doing work to prepare for the arrival of the next module. Its arrival can’t be too far in the future, and this complaint by China today suggests it will be sooner rather than later. When it happens China will face a flurry of justified criticism, and the Xi government likely plans to use this UN complaint then to deflect that criticism.

8 comments

China’s Long March 4C rocket launches Earth observation satellite

8:16 am

China today completed its 50th launch in 2021, successfully launching an Earth observation satellite into orbit using its Long March 4C rocket.

It also launched a cubesat built by students.

Not only does 50 launches smash its previous yearly launch record, set last year at 35, but it exceeds by 20% the 40 launches China had predicted at the start of the year it would complete in 2021.

The leaders in the 2021 launch race:

50 China
31 SpaceX
22 Russia
7 Europe (Arianespace)

China leads the U.S. 50 to 48 in the national rankings. This was the 131st launch in 2021, the second highest total in a single year since the launch of Sputnik in 1957.

7 comments

China launches two military satellites with its Long March 7A

8:56 am

China today successfully launched two military satellites from its coastal Wenchang spaceport, using its new Long March 7A rocket.

The Long March 7 family of rockets will eventually replace the Long March 2 and 3 families. It can launch from the coast, thus eliminating the need to drop boosters in China’s interior. It has greater capacity. It also uses kerosene and oxygen, not hypergolic fuels that ignite on contact and are very toxic.

The leaders in the 2021 launch race:

49 China
31 SpaceX
22 Russia
6 Europe (Arianespace)
5 ULA
5 Rocket Lab

As there no more American launches planned this year, with this launch China wins the 2021 launch race, moving ahead of the U.S. 49 to 48.

This was the 129th launch in 2021. As there are three launches still scheduled — a Russian Angara test launch, a Ariane 5 launch placing Webb in orbit, and a Russian OneWeb launch — the year is likely end up tying or beating 1975 as the most active year in rocketry ever. The Chinese could also launch, as it has in the past done a lot of launches in December.

0 comments

China’s Kuaizhou-1A rocket fails during launch

8:33 am

China’s Kuaizhou-1A rocket experienced its second launch failure on December 14th, though few details about what went wrong have been released.

The Kuaizhou-1A rocket is built by one of China’s pseudo-private companies, Expace.

Expace had been encouraged by three successful Kuaizhou-1A launches across September, October and November, which followed the Kuaizhou-1A being grounded for one year as a result of a failure in September 2020.

Since the rocket’s first three stages use solid rocket motors, it must have been derived from military missile technology. Thus, the company is not private, even if it has obtained Chinese private investment capital, but closely supervised by the Chinese government and its military.

11 comments

China launches second communications satellite for its manned space station missions

8:39 am

The new colonial movement: China today launched the second Tianlian communications satellite for its manned space station missions, using its Long March 3B rocket.

No word on whether the rocket’s first stage used parachutes or grid fins to control its crash landing in the interior of China.

The leaders in the 2021 launch race:

48 China
28 SpaceX
22 Russia
6 Europe (Arianespace)
5 ULA
5 Rocket Lab

China now leads the U.S. 48 to 45 in the national rankings. This launch was the 124th in 2021, making the sixth most active year in rocketry since Sputnik in 1957.

0 comments

China launches two satellites with Long March 4B

8:08 am

China today launched two satellites thought to be for military reconnaissance, using its Long March 4B rocket.

The leaders in the 2021 launch race:

47 China
27 SpaceX
21 Russia
6 Europe (Arianespace)
5 ULA
5 Rocket Lab

China now leads the U.S. 47 to 45 in the national rankings. There have now been 122 successful launches in 2021, making it the seventh most active year in the history of space exploratoin.

0 comments

ULA and China complete launches

9:14 am

Two launches were successfully completed in the past twelve hours.

First ULA’s Atlas-5 rocket successfully launched two Space Force military satellites and a NASA ultraviolet telescope into orbit on a launch that had been repeatedly delayed since February.

Next, one of China’s pseudo-private companies, Galactic Energy, completed its second launch of its Ceres-1 rocket, putting five smallsats into orbit. As the Ceres-1 rocket uses solid rocket motors, its initial development was for the military, and thus everything Galactic Energy does is carefully supervised by that Chinese military.

The leaders in the 2021 launch race:

46 China
27 SpaceX
20 Russia
6 Europe (Arianespace)
5 ULA

China now leads the U.S. 46 to 43 in the national rankings. The 118 total launches this year is now the most since 1985. And this number is only temporary, with two more launches scheduled in the next 24 hours.

0 comments

Yutu-2 continues its travels on Moon’s far side

9:06 am

The square boulder being targeted by Yutu-2

An update on the Chinese lunar rover Yutu-2 has revealed that its science team has now decided to head towards a square boulder that the rover had recently spotted on the nearby horizon.

The photo from Yutu-2 to the right shows that boulder. The original update was at this Chinese-language website.

The boulder is presently about 260 feet away, which at pace Yutu-2 travels, about 100 feet per lunar day, will take about two to three lunar days to get there.

Yutu-2 has been traversing the floor of 115-mile-wide Von Kรกrmรกn crater since January, 2019, a total of 36 lunar days, each about 14 Earth days long. The rover goes into hibernation during the lunar night, is then awakened each lunar morning to operate for about two-thirds of that lunar day, during which it travels about 100 feet, and is then returned to hibernation with the setting of the sun.

4 comments

Mars Express successfully relays data from Zhurong to Earth

10:21 am

The European Space Agency’s Mars Express orbiter has successfully been used to relay data from China’s Zhurong Mars rover to Earth and then to China.

In November, ESAโ€™s Mars Express and CNSAโ€™s Zhurong teams carried out a series of experimental communication tests in which Mars Express used this โ€˜in the blindโ€™ mode to listen for signals sent to it by the Zhurong Rover.

The experiments culminated in a successful test on 20 November. โ€œMars Express successfully received the signals sent by the rover, and our colleagues in the Zhurong team confirmed that all the data arrived on Earth in very good quality.โ€ says ESAโ€™s Gerhard Billig.

Apparently, normal communications would first involve “handshake” communications between the two, but that requires communications frequencies Zhurong does not use. Mars Express instead had to grab the data on the blind. The test was a success, which means the ESA will likely act as another communications relay for Zhurong, in addition to China’s Tianwen-1 orbiter, as the rover’s mission on Mars continues.

0 comments

China’s Kuaizhou-1A rocket launches classified government satellite

9:40 am

Late yesterday China’s Kuaizhou-1A rocket successfully launched classified government satellite into orbit.

The Kuaizhou rocket is supposedly operated by the pseudo private company Expace, but nothing it does happens without the approval of the Chinese government.

The leaders in the 2021 launch race:

44 China
26 SpaceX
20 Russia
5 Europe (Arianespace)

China now leads the U.S. 44 to 41 in the national rankings.

1 comment

China launches another Earth observation satellite

10:21 am

China’s high pace of launches in 2021 continued yesterday with another launch, this time placing an Earth observation satellite into orbit using its Long March 4C rocket.

This was China’s 43rd successful launch in ’21, three more than it had predicted it would achieve at the start of the year and the most any single nation has accomplished since the Russians completed 49 in 1994.

The leaders in the 2021 launch race:

43 China
25 SpaceX
18 Russia
5 Europe (Arianespace)

China now leads the U.S. 43 to 40 in the national rankings.

2 comments

China’s Long March 4B rocket launches Earth observation satellite

7:24 am

China early today successfully placed an Earth observation satellite in orbit, using its Long March 4B rocket.

This was China’s 42nd successful launch in 2021, which is two launches more than it had projected it would fly at the start of the years.

The leaders in the 2021 launch race:

42 China
25 SpaceX
18 Russia
5 Europe (Arianespace)

China now leads the U.S. 42 to 40 in the national rankings.

9 comments

Russia confirms and defends anti-satellite test

1:33 pm

Russia today confirmed that it had done the anti-satellite missile test earlier this week that destroyed one of its defunct satellites and produced a cloud of space junk.

Russia’s Ministry of Defence also issued a Russian-language statement defending the test. The minister-general of the army, Sergei Shoigu, said that the test was successful and that “the resulting fragments do not pose any threat to space activities,” according to a machine-generated translation to English.

The U.S. State Department said Monday that the test created a cloud of space debris made up of over 15,000 objects, calling it a threat to astronauts and cosmonauts, and space activities of all countries. The debris could pose a threat for years to come, experts have said. The space station’s crew had to shelter in their return ships on Monday when the debris cloud was first detected.

Russia’s space agency Roscosmos wrote on Twitter Monday that the space debris cloud “has moved away from the ISS orbit”, which is roughly 250 miles (400 km) above Earth. The space debris tracker LeoLabs estimates the debris cloud is at 273 to 323 miles (440 to 520 km) in altitude. However, “the station is in the green zone,” Roscosmos added.

The Russian claim that the debris at present poses no threat to ISS could very well be true. The trouble is that it appeared to have posed a threat initially, and will likely be a problem in the future. As a signatory of the Outer Space Treaty, Russia was required to avoid such a situation, and chose not to.

The article at the link notes similar tests by China (2007), the U.S. (2008), and India (2019). Of all these anti-satellite tests, only the U.S. targeted a satellite in an orbit so low that the debris posed no threat to operating satellites or manned spacecraft, and was also quickly pulled Earthward to burn up in the atmosphere. India chose a higher satellite whose debris posed less threat, but took longer to burn up and was initially of some concern.

China and Russia could have done the same thing. They did not, and their irresponsibility has badly worsened a problem that already was considered a serious concern.

13 comments

Russian anti-sat test creates 1500 more pieces of space junk

3:40 pm

In what appears to be a test of Russia’s anti-satellite system dubbed Nudol, a defunct Russia satellite has been blasted into approximately 1,500 pieces by a missile launched from Russia.

Under normal circumstances, Kosmos 1408 would not have approached the International Space Station closely enough to pose a threat, however following the breakup, thousands of individual pieces of debris will have scattered into their own orbits. At least 1,500 pieces of debris from the satellite have already been identified by the United States Space Command. However, many smaller objects will have been generated, which will take much longer to identify. With high relative velocities, even a tiny fragment can cause significant damage should it collide with another spacecraft.

Owing to concerns about the debris cloud, the crew aboard the ISS were instructed to close hatches between the space stationโ€™s modules and take shelter aboard the Dragon and Soyuz capsules docked to the station.

According to the story at the link, ISS will cut through the expected debris cloud every orbit.

It is amazing that Russia would perform such a test on a satellite with an orbit that close to ISS’s, especially since there are many pieces of abandoned space junk in lower orbits so that their debris clouds would pose little problem, especially because their orbits would decay quickly.

This test is comparable to the Chinese anti-sat test in 2007, which caused a larger debris cloud that still poses a threat to ISS and other working satellites.

According to the Outer Space Treaty, a nation must control the objects it puts in space so that they pose no risk to others. Both the Russian and Chinese anti-sat tests prove these nations have no respect for the treaties they sign.

17 comments

Zhurong’s continuing travels on Mars

10:26 am

Zhurong overview map
Click for original map.

This past week the Chinese press released a new but limited update on the status of both its Mars orbiter Tianwen-1 and its Mars rover Zhurong.

The map to the right uses as its background a high resolution picture from Mars Reconnaissance Orbiter. I have superimposed Zhurong’s route in green. You can get an idea of how far the rover has traveled since resuming communications with Earth in late October by comparing this map with the one I posted then. After stopping at a small sand dune (the crescent-shaped white features), it curved around to head to the southeast towards a rough area and a trough that is thought to be filled with sediment.

Meanwhile, the orbiter has shifted its orbit, changing from one dedicated mainly as providing a communications relay between Zhurong and Earth to one that now allows it to begin a two-year photographic survey of Mars.

To supplement the resulting gaps in communications for Zhurong, China and the European Space Agency (ESA) have made their first test using ESA’s Mars Express satellite as a relay satellite. Both hope to know soon whether it worked.

In either case, Zhurong’s travels will likely be slowed somewhat due to the reduction in communications access.

0 comments

China building floating sea platform for rocket launches

9:57 am

The new colonial movement: According to its social media channel, a Chinese pseudo-company is building a new floating sea platform to be used for both rocket launches of all kinds as well as first stage landings.

The 533 feet (162.5 meters) long, 131 feet (40 meters) wide “New-type rocket launching vessel” is being constructed for use with the new China Oriental Spaceport at Haiyang, Shandong province on the Eastern coast.

The new ship is expected to enter service in 2022. It will feature integrated launch support equipment and be capable of facilitating launches of the Long March 11, larger commercial “Smart Dragon” rockets and, in the future, liquid propellant rockets, according to the social media channel for the spaceport.

The vessel could also in the future be used for the recovery of first stages, possibly in the same way as SpaceX’s autonomous spaceport drone ships provide a landing platform for Falcon 9 and Falcon Heavy rocket first stages.

Long March 11 uses solid rocket motors and is designed for quick launch from a simple launchpad, so this platform would work easily with it. Changing that platform to handle liquid fueled rockets however is not trivial, and once done the platform would not necessarily be a good place to land first stages, considering the presence very nearby of fuel tanks and fuel lines.

2 comments

Scientists: Asteroid in an orbit entwined with the Earth might be Moon rock

11:45 am

Data obtained by scientists using ground-based telescopes now suggests that the small asteroid Kamo`oalewa, which has an orbit that makes it a quasi-Moon of the Earth, might have originally come from the Moon.

From their paper’s abstract:

We find that (469219) Kamoสปoalewa rotates with a period of 28.3 (+1.8/โˆ’1.3) minutes and displays a reddened reflectance spectrum from 0.4โ€“2.2 microns. This spectrum is indicative of a silicate-based composition, but with reddening beyond what is typically seen amongst asteroids in the inner solar system. We compare the spectrum to those of several material analogs and conclude that the best match is with lunar-like silicates. This interpretation implies extensive space weathering and raises the prospect that Kamoโ€™oalewa could comprise lunar material.

Kam’oalewa — which is only about 150 feet across — is one of five such quasi-Earth-moons. All orbit the Sun in orbits that are similar to the Earth’s and are such that the asteroids periodically loop around our planet each year.

This data will be useful to the Chinese, who are planning a mission to Kamo-oalewa in ’24 to grab samples.

0 comments

ISS to maneuver around space junk leftover from Chinese anti-satellite test

8:41 am

Russian engineers will today fire engines on a Progress freighter docked to ISS to guarantee that a piece of debris left over from a 2007 Chinese military anti-satellite test does not hit the station.

The object the space station will dodge is called 35114 in NASA’s catalog of space objects, and is also identified at 1999-025DKS, a piece of debris from a Chinese anti-satellite weapons test in 2007. Originally part of a Chinese weather satellite, the debris resulted from an in-orbit missile test performed by China. As part of that test, a kinetic-energy, suborbital missile was fired at a defunct Chinese weather satellite called Fengyun-1C (which stopped working in 2002), obliterating it into thousands of pieces.

The destroyed satellite was originally in a much higher orbit, but atmospheric drag has pulled the debris closer to Earth over the years and ultimately into the flight path of the space station. The two objects’ closest approach is estimated to occur on Nov. 12, according to Jonathan McDowell, an astronomer at Harvard who tracks and catalogs objects in space. McDowell tweeted on Tuesday that his calculations show that this will be the 29th space station debris avoidance maneuver, and the third related to the 2007 Chinese anti-satellite test.

The maneuver will take place prior to the arrival of Endurance, carrying four astronauts.

While the anti-sat test initially produced about 3,500 pieces of debris, that number has dropped in the past fourteen years to about 2,700 pieces as the orbits of these objects slowly decay. The test was also another example of China’s willingness to break the Outer Space Treaty. As a signatory China is required to control every object it puts into orbit in order to prevent collisions. Instead, it performed a military test that created debris in the thousands, in orbits that threaten ISS.

We shall get another demonstration of China’s contempt for treaties in the next few months, when it launches two more large modules to its space station and the large core stage of the rocket comes crashing down somewhere on Earth, out of control.

4 comments

Crew on China’s space station complete first spacewalk

9:17 am

The crew on China’s Tianhe space station have successfully completed their first spacewalk, with two astronauts spending 6.5 hours on the exterior of the station, testing their new spacesuits, the station’s robot arm, and the overall equipment used during such outside activities.

Zhai Zhigang was doing his second spacewalk, the first in thirteen years. Wang Yaping was doing her first, which made her the first Chinese woman to walk in space. This was her second space mission, the first in 2013 when she was the second Chinese woman fly in space.

The third crew member, Ye Guangfu, stayed on aboard the station to coordinate activities with the crew outside.

The crew is expected to do one to two more spacewalks during the rest of their six month mission. During that time two more large modules will be launched to the station.

0 comments
1 … 28 29 30 31 32 … 72