Low-earth orbit satellites threatened by debris from Indian anti-satellite test
breakingdefense.com
breakingdefense.com
Ever since NASA chief's comment, the arguments have been very polarised. What NASA said is scientifically accurate & being one of the major stake holder in ISS it has a duty to tell its opinion. There are people in International Space Station, don't forget that their family on earth would want an answer from NASA for such incidents.
The issue in the country seems to be, not what NASA said; but why did it say that!
Yes, US has conducted similar tests & its debris went further in apogee as well & since it didn't change orbit[second application of delta-v is required to do that]; it decayed eventually. Same will happen with the debris we caused as there is not much change in perigee.
If ASATs renew new arms race across the planet & everyone starts blowing satellites, it's not good for the humanity.
If Israel can enforce deterrence as a nuclear power without conducting or acknowledging major nuclear tests, India can project space warfare ready without indulging in such activities; after all there was no doubt about our rocket engineering capabilities to start with.
Edit : Typo
India didn't choose it's neighbors, but it is what it is. On one side is a country whose identity is defined by anti-India-nism. On the other side is China, need I say more. Moreover, both these neighbors are ganged up by their mutual animosity of India.
India doesn't have any options but to make sure there are deterrents in place. It's a necessity.
I'm sure Mahatma Gandhi & Co had to listen to such statements as well, glad that they didn't listen; Republic of India might not have been even formed otherwise.
There were many others who contributed, some more than others, some peacefully some not so. And, let's not forget the WW-2 after which the British were not in a strong enough position to hold on to colonies.
Also, you should ask Dalai Lama how the pacifism worked out for the Tibetans when their country was occupied by China. I surely don't want that for any country, and definitely not for India.
"It is better to be violent, if there is violence in our hearts, than to put on the cloak of nonviolence to cover impotence." - Mahatma Gandhi
Rest assured, Republic of India would've formed one way or the other.
Two incredibly low blows, although I suppose this way you've made your isolated point of view very clear.
> Moreover, both these neighbors are ganged up by their mutual animosity of India.
Another way of saying this is they've been successful in maintaining strong ties via diplomacy and trade, to the benefit of their peoples.
> India doesn't have any options but to make sure there are deterrents in place. It's a necessity.
There have always been options; some of which India has rejected themselves, arguably leading to the souring of other international relations. This weapons test will hopefully lead to condemnations and repercussions, direct or indirect.
For example, I would welcome the IRSO being excluded from further policy-making as part of the Inter-Agency Space Debris Coordination Committee (IADC).
https://en.wikipedia.org/wiki/China–Pakistan_relations#Milit...
How is it strong trade ties when one country owes billions of dollars to other?
https://www.indiatoday.in/world/story/pakistan-owe-china-gwa...
Pakistan does not have even puppet state as hindrance.
So it whose wordings are correct ?
Pentagon or NASA ?
The ASAT test was specifically conducted at the orbit of 380Km less than the maximum range of 100Kms because the residues will gradually decompose within weeks and there will be almost none interference to existing or upcoming orbital paths.
The Micro satellite was specifically chosen for this purpose. There is no reason for Nationalism in this.
Why would a former Beoing executive, who has had nothing to do with Beoing's space-related ventures in his 30 years there, know anything about orbital mechanics?
> the Pentagon stood by Shanahan's earlier assessment
Why would anyone at the pentagon who wanted to keep their job/position publicly release a conflict with a statement from their upper management?
It doesn't mean the number of debris in higher apogee or the their probability to cause harm is false(how ever low the probability might be). Anyone can verify the same, if they have the means.
NASA is answerable to public & that they did. Just like our ISRO is.
I see many, including media confusing between ISRO & DRDO in this context. DRDO was the one which conducted the ASAT test, even if ISRO was involved somehow it shouldn't be advertised; just like how NASA's involvement in any US defence related activity is contained.
The term 'peaceful space exploration' exists for a reason.
Blind nationalism has fueled our progress as a species.
While I would love nothing more but for it be the last country to do so, the precedent was set some time ago. The one that China destroyed in 2007 (or 2008?) was by far the biggest, creating thousands of pieces of debris bigger than a golf ball. 270 pieces (detected so far after India destroyed a satellite) seems pretty insignificant in comparison.
This event was the largest recorded creation of space debris in history with more than 2,000 pieces of trackable size (golf ball size and larger) officially cataloged in the immediate aftermath, and an estimated 150,000 debris particles.
As of October 2016, a total of 3,438 pieces of debris had been detected, with 571 decayed and 2,867 still in orbit nine years after the incident.
[0] https://en.wikipedia.org/wiki/2007_Chinese_anti-satellite_mi...
Polluting LEO to the point where we endanger our ability to get off the earth is extremely myopic.
The China's example is there because it puts the threat mentioned in the title into a perspective.
We definitely shouldn't destroy any satellites, but we already did. I don't see a reason not to compare them when we discuss how big is the threat.
EDIT: to those who downvote this comment, I'd love an explanation why you think I shouldn't make this comparison. As far as I know, no country destroyed more than one, so how else am I supposed to compare them?
[Country] did [bad thing] that affected [everyone/other countries]
It's to the point that there's typically limited discussion about the topic itself and a lot of back and forth whataboutism.
Also, HN finds usage of “whataboutism” a cliche perpetuated by The Last Week Tonight (John Oliver).
It is whataboutism. I don’t give a shit if it was perpetuated by some TV show. What matters is that HN needs to stop comparisons and distracting the conversation to historical artifacts “oh look, US engaged in Slavery 150 years ago so it is unfair to criticize working conditions at Foxconn”.
We need to stop doing this guys.
tl;dr HN is great at some things, and for the rest is just as good or bad as the rest of the internet, just with less humor and self-awareness.
There are subreddits that are higher quality for specific topics, but you have to go hunting to find them.
Of course if you compare HN to /politics then HN is vastly superior, but then if you compare the average non-technical thread here to anything in /science HN comes off the worse for it. Even putting aside ideological pissing matches bikeshedding, semantic arguments and language wars, you get a lot of weird self-help stuff here that would be funny if people weren’t so desperately sincere about it.
Sure. Just that the "we" cannot be one of the nations that did this before, as is the case here. That's hypocrisy and entitlement.
Just because other people did something stupid doesn't make it not stupid.
Why not? The US is the only nation to have used nuclear weapons in a war, and we even nuked space in 1962, more or less just to see what happened: https://en.wikipedia.org/wiki/Starfish_Prime . I don't see why that disqualifies either me, or the US government, from criticizing these things.
In other words Kesseler syndrome does not create some sort of impassable barrier -- in the above analog imagine your risk of getting hit by a car if you stand in one place for 30 seconds - again, basically 0. It just makes collisions, over the longrun, more likely to occur between orbiting bodies. There's absolutely no risk of impairing our ability to get off Earth -- just our ability to circle around it for years in fixed orbits. And in reality, I think it's almost certain we'll eventually see a Kessler syndrome type event. The first thing two capable nations involved in an armed conflict would do is to destroy each others' satellites, resulting in a severe mutual crippling of both offensive and defensive capabilities (as well as civil chaos - imagine if GPS/comms were all taken out tomorrow!) at very low cost. So the only way we do not see a Kessler Syndrome type event is if there's literally never a significant armed conflict between any of US/Russia/China/India, and whatever other future nations develop this technology. The odds of that seem to be pretty much 0.
Not a notable risk here. All this debris is short-term. If the Chinese satellite had been at the same altitude, all its debris would be long gone by now.
It's absolutely not okay and no country should do it. Saying "you shouldn't" to everyone else isn't gonna be effective at all when the precedent is set. Singing a treaty (like the nuclear treaties we've signed) might.
There are a very few problems that are comparable. The only ones that I could think of is climate change and nuclear program, because it's theoretically possible to harm humanity as a whole while doing no harm to locals.
Nobody gets killed, there are no consequences that they could even theoretically face, the possible dangers are someone else's, and you publicly display a defense mechanism that only the strongest nations posses.
From the government's perspective, this is nearly perfect. They'll be talked to sternly by some people, so what? That's where treaties can help, because other nations could point to it and say "we've agreed we won't do this because it harms humanity as a whole".
We've "solved" the nuclear crisis by signing treaties, and we can solve this one the same way. We have an international organization that can walk into any space in any country (that signed the treaty) under any suspicion that they might be making a nuclear bomb. Destruction of satellites, in comparison, is much more obvious and easy to spot.
It’s obvious you are confused between peers and adversaries.
When it comes to national security, the only best ethic is to reciprocate one’s adversaries polities and acts, and prove one is a credible deterrent.
India initiated non-violent political movements, but that does not mean Indians should remain mute spectator while its gigantic neighbour who has made it obvious that it wants to be a world economic-military superpower indulges in arms race.
Calling such deterrence “opportunistic” and “devoid” is a bit too rich.
Yes, pretty much. If a country doesn't want other countries to do a certain action then they themselves shouldn't do it either. You can't expect to be able to benefit from something and then deny other countries the same, unless you want to be a tyrant.
Probability is very low similar to the one in the below article.
Odds of hitting is 1 in 300 Trillion https://www.livescience.com/61955-chinese-space-station-reen...
TOTUS VESTRI ARCANA NOCTI NOBIS EST
Google translate refused.
TOTUS - all/whole
VESTRI - your
ARCANA - secrets
NOCTI - night? - 'used in formation of compound words' [0]
NOBIS - us/we
EST - to be - "can be translated as 'it is,' 'he/she is,' or simply 'is.' It is the third person singular of the present tense of the verb 'to be'" [1]
Sooo my guess would be something along the lines "All the secrets of the night belong to us?"If someone knows any better I would love to be corrected.
[0] - https://www.dictionary.com/browse/nocti- [1] - https://study.com/academy/answer/what-does-est-mean-in-latin...
I suspect it uses the wrong case (declension) for some of those words and I'm not sure if arcana can be used as a noun--I've forgotten some of my Latin. My best guesses:
What was intended: "all the secrets of your night are ours"
It actually says something closer to: "all the secrets of your night are to us"
It should use noster, as opposed to nos (nobis in the dative case), if I understand the intended meaning correctly.
The reason I suspect wrong case is that nobis is in the dative case whereas I think it should be a nominative in order to agree with the subject (so "noster" in order to agree with totus).
The original article says it is hard to estimate the increased risk due to this incident but says one NASA official estimates an increased chance of the ISS needing to maneuver to avoid debris from 20% to 30%, although that estimate should really be given with an associated time period to be meaningful.
https://www.indiatoday.in/world/story/mission-shakti-pentago...
And that's how we close off our only window to expand beyond this planet as a species.
>The catastrophic scenarios predict an increase in the number of collisions per year, as opposed to a physically impassable barrier to space exploration that occurs in higher orbits.
To a large extent, LEO aggression can be modeled even more dissuasively (collapsing into MAD) via game theory.
If I blow up your satellites, and I don't know where the pieces are liable to go, then I imperil my own satellites in a similar orbit.
Ergo, if I have space assets and ASAT capability, the strictly dominating strategy is to publicly declare I will only deploy my ASAT weapons in defense or if strategic red lines are breached (e.g. territorial invasion).
Consequently, it's in the US's best interests for other countries with ASAT capabilities to increase their satellite capabilities.
If the latter, then yes. I believe they, the US, and most other countries in the world would rather suffer a tactical strike than crack the lid on indiscriminate ASAT usage.
India announces that if China bombs Delhi, all options are on the table.
China mulls over the potential ASAT repercussions and decides the strike isn't worth it.
That's the inherent safety of MAD. It requires no trust in your counterparty -- only convincing them that you will extract a heavy toll if (and only if!) they take a specific action.
There's some fear mongering over China related to this[1], but I don't think the capability has ever been demonstrated because of the implications.
[1] https://nationalinterest.org/blog/buzz/china-will-soon-be-ab...
Edit: I posted incorrect information. GPS satellites orbit at ~12,000 miles, not GSO at 22,000.
https://www.nasa.gov/sites/default/files/atoms/files/niac_20...
These are several hundred objects travelling with enough momentum to do catastrophic damage to launch vehicles and other orbiting equipment. They’re not icebergs floating on the ocean, they’re bullets whizzing through that volume at incredible velocities.
Would you get on a plane if every airport runway doubled as an active shooting range?
Our launch sites are tiny spaces designed to reduce launch cost by getting a boost from the earths rotation or to select particular orbits. That these narrow corridors may be polluted with debris from satellites launched into very similar orbits is frightening in the extreme.
Yeah, India should be held accountable to the same degree that others 3 were held to.
A few hundred years is how long things stay on those orbits.
I was also talking about normal orbits, not the highly excentric stuff you get after an explosion. Since the GP was about long term concerns, that's more fitting. Yes, the debris of this one explosion will be almost all (or maybe literally all) gone in a month.
And yes, hundreds of years is still an overstatement. But decades would be an understatement for many of the objects we put into LEO.
From severity to probability, nearly everything on news or discussion sites about Kessler Syndrome seems to be a severe misconception.
They get no respect here for that either.