Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror
×
Space China

China Says SpaceX Satellites Nearly Collided With Its Space Station (cnbc.com) 283

Chinese citizens lashed out online against billionaire Tesla and SpaceX CEO Elon Musk on Monday after China complained that its space station was forced to take evasive action to avoid collision with satellites launched by Musk's Starlink program. CNBC reports: The satellites from Starlink Internet Services, a division of Musk's SpaceX aerospace company, had two "close encounters" with the Chinese space station on July 1 and Oct. 21, according to a document submitted by China earlier this month to the U.N.'s space agency. "For safety reasons, the China Space Station implemented preventive collision avoidance control," China said in a document published on the website of the United Nations Office for Outer Space Affairs. The complaints have not been independently verified.

In a post on China's Twitter-like Weibo microblogging platform on Monday, one user said Starlink's satellites were "just a pile of space junk," while another described them as "American space warfare weapons." SpaceX alone has deployed nearly 1,900 satellites to serve its Starlink broadband network, and is planning more. "The risks of Starlink are being gradually exposed, the whole human race will pay for their business activities," a user posting under the name Chen Haiying said on Weibo.

This discussion has been archived. No new comments can be posted.

China Says SpaceX Satellites Nearly Collided With Its Space Station

Comments Filter:
  • Not only do all of the SpaceX satellites orbit in a really predicable pattern, the SPaceX satellites also are at a known altitude, at which surely you would be a fool to put a space station?

    Unlike all the other actual space junk, the SpaceX satellites are a very knowable quantity, it seems if the Chinese space station was anywhere near them, that's problem with China's engineers.

    • by ravenshrike ( 808508 ) on Tuesday December 28, 2021 @02:25AM (#62121179)

      You'll notice they did not provide times and the distances of the sats in question, just a nebulous set of dates 2 and a 1/2 months later. If this had really happened, they would have been screaming about it the day after.

      • Yes good point (Score:4, Interesting)

        by SuperKendall ( 25149 ) on Tuesday December 28, 2021 @02:28AM (#62121191)

        You'll notice they did not provide times and the distances of the sats in question, just a nebulous set of dates 2 and a 1/2 months later.

        That's a great point. Thinking further on this, how do they even know it was SpaceX satellites they nearly ran into, if they didn't have enough data to avoid them to begin with? It could have been anything if they don't know where the SpaceX satellites are, and if they did know it was their own bad calculations that let them get too close.

        • Thinking further on this, how do they even know it was SpaceX satellites they nearly ran into

          If you manage to get your thinking cap on, you might ask yourself: Does a communication satellite have a transponder? Or is it radio silent?

          • by necro81 ( 917438 )

            If you manage to get your thinking cap on, you might ask yourself: Does a communication satellite have a transponder? Or is it radio silent?

            It is entirely possible for a communications satellite to broadcast with large amounts of power, but for some other spacecraft to not detect it. A communications satellite uses directional, high-gain antennae, designed specifically to not have a lot of emissions outside of the intended direction. Any off-axis emissions are wasted power.

            Contrast that with a transp

        • It all depends, maybe it was a satellite that still needed to get to it's actual position, as apparently it takes a couple of months before the satellites are at their actual end position. So the space station is already at it's fixed position, and the satellite is not, who's fault is it if the satellite is getting to close? We also don't know if the satellite was actually in it's right position. So to blame the chinese with their space station for what happened is a bit too early. We don know SpaceX isn't
        • Re:Yes good point (Score:5, Informative)

          by AmiMoJo ( 196126 ) on Tuesday December 28, 2021 @06:15AM (#62121465) Homepage Journal

          The complaint in full is here: https://www.unoosa.org/res/oos... [unoosa.org]

          It mentions Starlink satellites 1095 and 2305. Part of the problem is the fact that they didn't know what the satellites were doing. One seemed to be in a stable orbit, presumably parked while waiting to be raised to operating altitude. The other was actively manoeuvring, and they didn't know if it would take action to avoid a collision or if they needed to, so they did the safest thing and move their station out of its path.

          Does Starlink provide real-time information on what its satellites intended flight paths are? Did they contact the Chinese to reassure them that they were aware of the possible collision and would take steps to avoid it? It appears not.

      • by thegarbz ( 1787294 ) on Tuesday December 28, 2021 @07:38AM (#62121557)

        You'll notice they did not provide times and the distances of the sats in question

        You can look this up yourself. Satellite orbits aren't actually secret and there are plenty of websites you can type the names of the two satellites into and see that they very much did in fact cross paths with each other.

    • by bookwormT3 ( 8067412 ) on Tuesday December 28, 2021 @02:54AM (#62121233)

      Unlike all the other actual space junk

      Not to put too fine a point on it, but a good percentage of the actual space junk was caused by the CCP themselves, when they tested their anti-satellite missile in 2007. (quick google search produced multiple results from 2021 suggesting both 3000+ pieces of space junk, as well as saying the junk was still causing problems) Yes I know they're not they that wasn't the only mass hazard event that anyone ever performed, but ~15 years isn't enough to have clean hands after even one event like that.

      So even if what they say is completely true (see above comments questioning that), it's pretty ballsy (read: hypocritical) of them to complain about orbital traffic. Sort of like a rubbish truck with an unsecured load dropping thousands of road hazards out the back, endangering other cars and risking dozens of pileups, and then complaining that a particular fleet of company cars that is making the highways somewhat crowded.

      • The ISS had to dodge Chinese junk in November. I have to wonder if this might be BS PR of the, "well, we had to dodge your stuff too, so really, you're the jerks", variety.
    • Well, according to another poster, they're using ion drives to go from well below the space station altitude to well above it. So at some point they are at the same altitude.

      That doesn't mean the Chinese were honest, or even correct in identifying what any objects were, but it does mean that during the migration (to save on fuel costs, apparently) they are not a known quantity.

      We really need proper space traffic control.

      • There's also this, stating that the satellites are deployed at 440km - https://www.discovermagazine.c... [discovermagazine.com]

        And it looks like the station isn't in a fixed orbit. Apparently it ranges from just past the ISS to 450km. Now, they know where Starlink goes, they know when the launches are, and Starlink knows where the station is expected to be. So, what happened and why?

    • by DamnOregonian ( 963763 ) on Tuesday December 28, 2021 @04:03AM (#62121355)

      Not only do all of the SpaceX satellites orbit in a really predicable pattern, the SPaceX satellites also are at a known altitude, at which surely you would be a fool to put a space station?

      StarLink sats are released below Tiangong, and boost themselves above it.
      During their transition, they do cross orbital planes with Tiangong.

      Unlike all the other actual space junk, the SpaceX satellites are a very knowable quantity, it seems if the Chinese space station was anywhere near them, that's problem with China's engineers.

      To the contrary, Tiangong is in a static orbit, it is the StarLink sats that are moving (until they reach their final orbit)

      Note, I'm not saying this actually happened. It's really hard to tell who's more full of shit, people like you, or the Chinese government. But the fact is, it could have happened, it if it did, it's flatly StarLink's fault.

  • by drinkypoo ( 153816 ) <drink@hyperlogos.org> on Tuesday December 28, 2021 @02:19AM (#62121165) Homepage Journal

    The risks of Starlink are being gradually exposed, the whole human race will pay for their business activities

    The risks of China are being gradually exposed, the whole human race will pay for their business activities... in wet markets

    • by AmiMoJo ( 196126 )

      Sad that the first post is just whataboutism. There is an important issue here.

    • The risks of China are being gradually exposed, the whole human race will pay for their business activities... in wet markets

      Why would we go to a wet market to pay for China's business activities? That makes no sense.

  • by tedr2 ( 1502807 ) on Tuesday December 28, 2021 @02:20AM (#62121167)
    Starlink is really a great threat to CCP as it provides a mean to directly contravene their Great Firewall. CCP does not want it sheeps to know what runs contrary to its party line. Capitalism vs CCP authoritarianism, the Star Wars edition.
    • And we have a winner. If Musk is smart he will automate the system so it does not report internally any returns in China, instead punting their reported to human eyes coordinates to a random country near China. So long as the account the unit smuggled into China is being paid for, service continues to it.

    • by Mr. Dollar Ton ( 5495648 ) on Tuesday December 28, 2021 @02:48AM (#62121215)

      Starlink provides nothing of the sort.

      To be able to operate in a country, Starlink will need to have a license, then to sell, install and operate hardware and collect fees, and none of this will happen in China without a permission from their government.

      Not to mention that even if Musk drops from space free "connect to starlink" kits all over the place, the antennas will be in plain sight, and a dead giveaway.

      You're trying too hard.

      • The antennas are relatively small flat planes easily moveable(moreover, there are now rectangular ones even smaller than the round ones) or coverable by a tarp when not in use and easy to create fakes as well from an overhead perspective. So just scatter a bunch of roof decorations around and the false positives will completely screw up any surveillance efforts.

        • LOL, you really think that a police state that has probably a quarter of the population enlisted as informers will be thrown off your scent by the cute placement of 10 more antenna-like objects on the roof of the apartment building you live in?

          You must not be of this Earth.

          • Quite easily (Score:5, Interesting)

            by Kludge ( 13653 ) on Tuesday December 28, 2021 @07:20AM (#62121525)

            10 more antenna-like objects on every apartment building? Yes, that would throw people off. And when that quarter of the population finds that they too can have unfettered internet access? Sure, they'll report everything (/sarcasm). Any kind of free communication is a threat to dictatorships.
            Mr. Dollar Ton, I am pretty sure that you are part of the Chinese government's propaganda arm based on all your posting here.

            • China could and would outlaw "fake" antennas as well and threaten to arrest anyone who has something that looks like an antenna. And the Starlink users would need whoever owns every building to participate. And, and, to use this system you will be transmitting signals steadily which make finding you pretty easy unless you only want to use it for a few minutes a month.

              It's not THAT easy to get around a government.

      • by AmiMoJo ( 196126 )

        Besides which the bands which Starlink uses are relatively easy to jam. The signals are quite weak.

        That said, China will probably allow at least some tech companies to have connections, in order to develop products. The firewall is much less restrictive down in Shenzhen, not least so that companies can develop Android phones for export. Google services are blocked in most of China.

      • Ever hear of bootleg cable boxes?
    • This doesn't pass the smell test.
      Signals from orbit are ridiculously easy to jam, without even interfering with local communications.
    • by nagora ( 177841 )

      Starlink is really a great threat to CCP as it provides a mean to directly contravene their Great Firewall. CCP does not want it sheeps to know what runs contrary to its party line. Capitalism vs CCP authoritarianism, the Star Wars edition.

      I'm not sure which form of capitalism you think is anti-authoritarianism. Is it the form that relies on the authoritarian governments for cheap labour with no worker protections?

      • Capitalism can't exist unless the people are free political and economic agents. Democracy has the same restrictions. Authoritarianism precludes free agency in either regard. The systems are incompatible but that doesn't mean people in a free society can't do business with people who aren't, especially given that greed is a human failing found anywhere and everywhere regardless of political or economic systems.
  • We don't need any more private space junk to make a tragedy out of the galactic commons!

    Yours, William-Adam Forster Lloyd Smith

    • We don't need any more private space junk to make a tragedy out of the galactic commons!

      StarLink satellites orbit at an altitude low enough to experience atmosphere drag. They use periodic ion boosters to maintain orbit (using cheaper krypton rather than the usual xenon).

      Any debris from a collision will slow down and deorbit. Paint chips and metal shavings will deorbit and burn up in a few days. A screw or bolt will be gone in a few weeks.

      If a satellite fails, it will no longer be boosted and will deorbit in a few years.

      SpaceX is being a responsible space citizen. This is partly self-inter

      • You sure? Promises are cheap, and you aren't showing me any math. IIRC, Musk's car company received a hefty amount of billions on the promise of swappable batteries and we haven't heard about this feature since. Who knows what features are actually deployed on satellites that are being sent out without any international control whatsoever?

        • Yes, they're sure.

          https://www.swpc.noaa.gov/impa... [noaa.gov]

          Starlink operates in LEO, like many other satellites. These aren't just marketing claims.
          • Show me your deorbiting time calculations, not some random website that discusses the problem in general. Last time I tried to calculate deorbit time for a typical starlink satellite based on what's actually known about them I got anywhere between a few years to a few decades.

      • by AmiMoJo ( 196126 )

        The problem is if a satellite fails at 550km, the altitude Starlink is designed to work at, it has to descend through all the lower orbits before burning up. In the lower orbits are other satellites and two space stations.

        In this case though the Chinese are complaining about not being given information about the movements of Starlink satellites that have yet to reach their operating orbits, which posed potential hazards as they occupied temporary orbits and raised themselves up.

        • The problem is if a satellite fails at 550km, the altitude Starlink is designed to work at, it has to descend through all the lower orbits before burning up.

          Space is big and a Starlink satellite is very easy to track. As it descends, the friction increases quickly so it will not be in the low orbit for long.

          The problem with "space junk" is loose bolts and paint chips too small to track.

    • by iTrawl ( 4142459 )

      Insert scene with Ron Perlman shooting at the sky, here.

  • My guess is they were probably many miles from each other in 3D. Do they even share the same orbital plane?

  • by Cochonou ( 576531 ) on Tuesday December 28, 2021 @02:36AM (#62121201) Homepage
    The fact that the Chinese space station had to make a collision avoidance maneuver to avoid Starlink satellites is interesting news. What random people say on Weibo about this event is arguably not interesting.
    • Re: (Score:3, Interesting)

      by Hagaric ( 2591241 )

      Actually, these are 2 separate stories, the one about the near collision, and the one about the chinese astroturfing propaganda effort, both are interesting, for totally separate reasons.

    • by nagora ( 177841 )

      The fact that the Chinese space station had to make a collision avoidance maneuver to avoid Starlink satellites is interesting news. What random people say on Weibo about this event is arguably not interesting.

      /. is founded on the idea that what random people say about tech news is interesting.

  • by bradley13 ( 1118935 ) on Tuesday December 28, 2021 @02:50AM (#62121227) Homepage

    ...don't like it, when their citizens have communication options outside of government control.

    Someone asked Musk what governments should do, if they didn't want their citizens to have access to Starlink. He said "they can shake their fist at the sky".

    That goes both for governments seeking to block access entirely, and also for all those governments wanting to charge fees and impose local regulations. They can control ground equipment, obviously, but (afaik) there is no international framework providing individual patches of dirt with control over orbital activities. Perhaps there should be such a framework, but that's a different discussion.

  • by spacexfangirl ( 8187174 ) on Tuesday December 28, 2021 @03:00AM (#62121245)
    It's interesting to see all the bots come out in support of China here, when China doesn't notify others of their orbits or even come to the table to talk about it. Remember, China launches without consulting others, and then complains when approved launches interfere with them, as well as having no control over where their re-entry vehicles may come down. These kind of manuevers occur all the time and don't get any notice, it's just because China is scared of Starlink. They're already copying Tesla and then they'll seize the factories over there. Musk has made a mistake if he thinks otherwise.
  • by Miamicanes ( 730264 ) on Tuesday December 28, 2021 @03:23AM (#62121303)

    My theory:

    * SpaceX asked China for their station's orbital parameters (so they could calculate its path, and calculate their own to avoid it by a safe margin).

    * Chinese officials deliberately gave SpaceX slightly inaccurate info, on the theory that being vague somehow helps Chinese national security (the same way they require online maps to be slightly inaccurate in their correlation of latitude and longitude to aerial imagery and infrastructure).

    * SpaceX took China's word for it... but also knew China probably lied, so they sent China a memo to the effect of, "FYI, here's the exact path OUR satellites will be taking. If the information you gave us about your station's location wasn't 100% forthright and accurate, we advise you to do your own math, and GTF out of our way if your station isn't exactly where you said it was going to be."

    * China, caught in its lie, doubled down, and tried to spin it as being somehow SpaceX's fault when really, it was their own lie that put them in danger to begin with.

    • Sadly plausible, but so is a series of no-real-fault mishaps and miscommunications. Could be nothing, could be that China wanted to complain about having to dodge our stuff because of last month's near miss between the ISS and Chinese debris. It would all be straightened out nice and clean if we could believe a single word China says.
  • by Anonymous Coward

    In a post on China's Twitter-like Weibo microblogging platform on Monday, one user said Starlink's satellites were "just a pile of space junk," while another described them as "American space warfare weapons."

    Slightly off-topic, but I'm not impressed by this trend for journalists to incorporate tweets (or other social posts) from random citizens of the world as supporting evidence for the claims of their articles. China has 1.4 billion citizens, so quoting two random tweets is insufficient evidence to support the summary's implied claim -- that many Chinese citizens are irate.

    I think it's an attempt to humanize the article and make it more impactful... but you can find a couple of comments to support nearly any

    • Yeah, they need to stop pretending that social media posts are representative of a population's attitudes. I don't know what Weibo's user base looks like, but only about 20% of Americans are on Twitter, and most noise comes from a fraction of those users. So, you're going to get a non-representative sample of a non-representative sample, which is about as useful as writing "screw Flanders" over and over again.
  • Imagine the fun if each Starlink had a little explosive charge in them?
  • Chinese Propaganda (Score:5, Insightful)

    by nateman1352 ( 971364 ) on Tuesday December 28, 2021 @03:42AM (#62121325)

    It is very unlikely there is any truth in any of this. This is just posturing as a precursor to try to create an international regulatory body that decides who gets to access low Earth orbit. The rest of the world realizes that Starlink is how Starship is going to get financed. And Starship will enable the US to become a much more dominant presence in space than it already is. Europe seems pretty on board with trying to create legal hurdles to protect their inferior aerospace industry as well. Its all incredibly petty when you consider the new possibilities that Starship will open for mankind.

    Also why are we suddenly seeing PRC (mainland China) propaganda on /.? Between this article's summary [slashdot.org] calling into question the very real plight of the Uyghurs and now this article... what the hell is going on? The worst thing we can do is give the PRC a platform. They are fighting for relevancy on the global stage, the best thing we can do is ignore them and continue to operate without giving them any concessions. Look what happened when the UK gave them concessions on Hong Kong... we cannot afford another mistake like that.

    • Re: (Score:3, Insightful)

      by AmiMoJo ( 196126 )

      You may recall that the ISS recently had to dodge debris from a Russian anti-satellite weapon test. There needs to be more regulation.

      Also keen in mind that Starlink has less than 2000 satellites up there right now. They are talking about 10s of thousands total. We need to keep a close eye on this as the numbers increase.

      If Starlink puts up 30k satellites, other networks will also want to put up 30k satellites to get similar coverage. This is how you get Kessler syndrome.

      • Sure, intentionally generating space debris like what the Russians did should probably not be allowed. But it is completely inappropriate to compare that with Starlink. Starlink satellites are designed to de-orbit themselves after they have reached the end of their operational life. Moreover, they are specifically set to a low enough altitude that even if one of them lost control atmospheric drag would de-orbit it after a few years. Its not like Starlink is completely unregulated, the FCC and FAA did extens

        • Re: (Score:2, Interesting)

          by AmiMoJo ( 196126 )

          As an engineer, I have some questions.

          What is the failure rate of Starlink satellites? SpaceX has floated numbers between 12,000 and 42,000 for the total number of in-orbit satellites they want to put up, so even a small percentage failing is a lot of uncontrolled de-orbits through parts of LEO that include space stations and many other satellites.

          Why were the Chinese not given data about the movements of the two satellites they identified, to reassure them that a collision was not possible? Did SpaceX noti

      • In November, the ISS had to dodge debris from a Chinese missile test.

        We manage to fly across the globe despite there being almost 200 national flight control agencies, is there some reason we can't coordinate between a far smaller number of agencies and flights without anyone surrendering their sovereignty?

    • Also why are we suddenly seeing PRC (mainland China) propaganda on /.?

      Yeah, it's a real mystery, what with /.'s unwavering devotion to freedom and free speech and all ...

  • by Martin S. ( 98249 ) on Tuesday December 28, 2021 @03:56AM (#62121345) Journal

    Western astronomers have already called out SpaceX.

    "Aggressive space activities without adequate safeguards could significantly shorten the time between collisions and produce an intolerable hazard to future spacecraft. Some of the most environmentally dangerous activities in space include large constellations such as those initially proposed by the Strategic Defense Initiative in the mid-1980s, large structures such as those considered in the late-1970s for building solar power stations in Earth orbit, and anti-satellite warfare using systems tested by the USSR, the US, and China over the past 30 years. Such aggressive activities could set up a situation where a single satellite failure could lead to cascading failures of many satellites in a period much shorter than years."

    https://en.wikipedia.org/wiki/... [wikipedia.org]

    • Space-X will ultimately make up for it by lofting lots of space and lunar telescopes with Starship. In another decade the astronomers will have more telescope time than they know what to do with.
  • by IUSR ( 760153 ) on Tuesday December 28, 2021 @04:36AM (#62121379)
    China's note verbale: https://www.unoosa.org/oosa/oo... [unoosa.org] . The US's note verbale for Starlink-1095: https://www.unoosa.org/oosa/en... [unoosa.org] , and for Starlink-2305: https://www.unoosa.org/oosa/en... [unoosa.org] . Both, as well as many other Starlink satellites, were expected to operate at about 350km. Then according to https://in-the-sky.org/spacecr... [in-the-sky.org] , and some other similar websites whose owners are neither Chinese nor American, Starlink-1095 ascended to 550km before plunging back to around 350km, and malfunctioning (no evidence, only from enthusiasts) and decaying. I don't like that particular govt, those poor brainwashed souls included, but we need to be better than this.
  • Are supposed to have known ranges and trajectories.

    They HAVE to, to avoid collisions.

    This includes StarLink, and China.

    So, either StarLink's assets were operating in the wrong orbits, or China's were...

  • It sounds to me like Tesla China might be getting nationalized soon.

  • Good old China ... the macro-agression in the room, which we ignore while chasing our tails with imaginary microagressions ...
  • by RitchCraft ( 6454710 ) on Tuesday December 28, 2021 @10:43AM (#62122017)
    ... at least SpaceX isn't blowing up satellites causing random debris like China has done. You can track and predict Starlink satellite orbits.

Garbage In -- Gospel Out.

Working...