Nuclear space-based ASAT weapons – A brief international legal perspective

Charlie JP Bennett,   27 Feb 24, https://www.ejiltalk.org/nuclear-space-based-asat-weapons-a-brief-international-legal-perspective/

On 14th February 2024, US and UK media reported the emergence of serious national security concerns by senior American officials and lawmakers that the Russian state was pursuing the deployment of a nuclear-based weapon designed to eliminate (enemy) satellites. It was added that such a weapon had not yet been deployed, but had reached some stage of development.

The exact severity of the development remains hotly contested (also here) and presently unknown, but was described as a ‘destabilising foreign military capability’ to the US and its allies. There is speculation that it may be a political ploy to further pressure the US house to authorise further aid to Ukraine in its conflict against Russia. There has also been speculation regarding a critically-important ambiguity in the information released – is it a nuclear weapon, or merely a nuclear-powered weapon? The latter is far less destructive.

Yet, the White House NSC strategic communications coordinator, John Kerby, stated on February 15th, without any hesitation whatsoever, that the weapon, if deployed, would be ‘space based, and a violation of the Outer Space Treaty’. Assuming this is true, and though not definitive evidence, the fact that no other weapons are prohibited by the Outer Space Treaty except for nuclear weapons/WMDs (see below) means that we have to consider the nuclear weapon scenario. The scenario for a weapon to be so definitively contrary to the treaty, and not nuclear, is small. Even if true in part, it would mark a frightening turning point in the decades-long consensus regarding nuclear-based weapons in space; and yet another compounding issue for an international legal order stretched to its limits.

How such weapons may work

It seems highly likely that the intent of such a space-based nuclear explosion would be to knock out satellites through the emission of a powerful Electromagnetic Pulse (EMP) as a consequence of the explosion: rendering all electronics caught in the (potentially enormous) area – and thus also any satellites – damaged or outright inoperable. These effects can linger for years, forming an artificial radiation belt around earth.

One of the last nuclear tests in outer space, the American ‘starfish prime’, produced an EMP so (unexpectedly) powerful that it damaged all electronics within a ~900 mile / ~1450 kilometre radius – including on the ground in Hawaii. That explosion had a large yield of approximately 1.4 megatons. Its resulting electromagnetic effects carried by the planet’s magnetic field, flattening them into a radioactive belt, almost immediately rendered three satellites in Low Earth Orbit (LEO) inoperable, and ultimately destroyed eight in the months that followed due to lingering radiation in orbit. Not many in absolute terms – but roughly a third of those deployed in 1962; at time of writing, there are approximately 8,300. This was not even a weapon designed to produce as large an EMP as possible, or to target specific orbits – both things a new weapon might do. There is little doubt that deployment of such an EMP through a nuclear medium would be a highly destructive weapon.

Some observers have pointed out that use of such a weapon would damage Russia’s (or any nuclear-ASAT deploying nation’s) own interests; its own space-based infrastructure – with the implication being that they would thus never actually use it. Given the events of the past several years, however, can we really rely on the assumption that a state will not – even severely – damage itself to prevent another state from achieving/acquiring/joining something? No. Absolutely not.

Tearing up the nuclear-space consensus

It is pertinent to distinguish between the use/deployment of a nuclear weapon in space, and the mere placing of such a weapon into outer space. Both are prohibited through different instruments.

Use of such a weapon in space is, flatly, prohibited. The most obvious legal violation would be against the “1963 Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space and Under Water” (otherwise known as the ‘Partial test-ban treaty’), to which Russia is (and for now remains) a founding party. It is a short treaty with one operable article, created immediately after the Cuban Missile Crisis of 1962. It simply states the following:

Article 1

1. Each of the Parties to this Treaty undertakes to prohibit, to prevent, and not to carry out any nuclear weapon test explosion, or any other nuclear explosion, at any place under its jurisdiction or control:

          a. in the atmosphere; beyond its limits, including outer space […]

The provision includes no further qualification. For now Russia remains a party to this treaty, though has pulled out of similar cold-war era treaties in recent years given the restrictions they place on military operations.

Further, the mere placement of such a weapon into space is clearly prohibited by international space law. The Outer Space Treaty is sometimes known as the ‘Space Constitution’, and is the most fundamental treaty governing outer space activities. All major space powers, including the US, Russia, China, Japan, and leading European states, are party to it. It plainly states:

Article IV

States Parties to the Treaty undertake not to place in orbit around the earth any objects carrying nuclear weapons or any other kinds of weapons of mass destruction, install such weapons on celestial bodies, or station such weapons in outer space in any other manner.

[…]

These provisions are rather simple as international legal provisions go. They reflect an agreement between the Soviet Union and the US established after repeated nuclear crises in the 1960s that the use of nuclear weapons must be limited as far as possible – including in outer space.

Desecration of the space environment

In addition to the above, there is also (as is so common when talking about space-based issues) the issue of the debris it will cause.  Dead, inoperable satellites-turned-debris cannot manoeuvre to avoid orbital collisions with debris. They will remain in orbit, as debris, for potentially indefinitely depending on their altitude. While there is no binding international law or custom (yet) that prohibits the production of space debris, it could certainly be argued that the desecration of the space environment in this manner violates the Outer Space Treaty, Article IX of which prohibits the ‘contamination’ of the space environment and its celestial bodies.

We also know from the long-lasting consequences of Starfish Prime that, depending on the size and calibration of the weapon, entire regions of Low Earth Orbit could be rendered (near-)uninhabitable zones for satellites – or indeed any electronic systems – for potentially several years. This is strikingly similar, in terms of severity and also duration, with a Kessler Syndrome/Cascade; the worst case scenario following the continuous build-up of conventional space debris multiple decades from now. Entire regions of LEO could be rendered inoperable for satellites post-deployment of such a weapon, without considering the more immediate damage it would cause.

The Legality of the Threat or Use of Nuclear Weapons Advisory Opinion, though inconclusive in its final determination of the legality of a nuclear weapon’s use, does make clear that the long-term, and widespread nature of nuclear effects may well be in violation of international humanitarian law. The Court did not apply its reasoning to the realm of space specifically. However, it is worth noting that the effects of rendering regions of space uninhabitable is notably far more widespread than the effects of a typical nuclear weapon detonated on the ground (actually a little above) – whereas the latter may affect an area of hundreds of square kilometres, the former may affect an area of hundreds of thousands of cubic kilometres. Whether this changes the proportionality equation (preserved by the Court in relation to an extreme circumstance of self-defence) is perhaps worth further thought.

Further consequences

There has not been a known nuclear deployment in space since the 60s. Since then, the Partial Nuclear Test Ban and Outer Space Treaties have held firm, albeit with a couple of allegations of relatively minor primarily procedural breaches by various parties, from which no consequence followed. The mere deployment of such weapons may therefore tear up over 55 years of legal and geopolitical consensus, and throw astropolitics into a new era of threat – one where, as is increasingly common in many areas, international rules give way to military and strategic interests.

It is far from clear whether or not the US or its allies have capabilities to stop such a weapon from being deployed should it reach space. In theory, conventional ASAT weapons (also heavily restricted) might be able to take them out before deployment, but this would of course amount to direct military engagement at a time where military intervention could have explosive consequences. Thus, once there, such  a weapon would hang in orbit like a Sword of Damocles ready to swing – potentially crippling parts of civil (or even military) infrastructure at least for a time if used – and causing significant military, economic and societal damage. Given that a nation could send a nuclear weapon into space atop a ballistic missile if it wanted to, the insecurity and fear of having a nuclear weapon orbiting above a country at any point might even be its primary destructive power. They could also be extremely difficult to detect/verify as there – unlike a ballistic launch.

Concluding remarks

If Russia, or any nation, were to do this, there is no doubt that the placement, or detonation, of nuclear-based weapons in outer space would amount to a flagrant violation of several enduring international treaties. A great deal remains unknown, and seemingly contradictory. It is nonetheless important (also for international lawyers) to prepare for all scenarios – including purportedly stupid, self-harming ones. Russia has already harmed its (and all of our) space environment via conventional ASAT testing.

This further raises the question about whether Russia may withdraw from further nuclear-restricting treaties to do this, as has been hypothesised. It already has with several. The departure of one of the most prominent space-faring nations from the Outer Space Treaty would be legally monumental at a critical juncture in the development of international space law. It would further reflect yet more dismantling of the most basic rules of the ‘rules-based international order’.

Finally, this threat – the ambiguity of its imminence and its true existence aside – highlights the importance of the defence of space-based infrastructure upon which so much of the modern world – and modern military – relies. The vulnerability of these systems is now plain for all to see, and may perhaps induce concrete action to mitigate their risks. The threat of an outer-space arms race remains firmly on the table as a result of these developments, to the detriment of global safety, and especially to outer-space activities.

March 1, 2024 Posted by Christina Macpherson | space travel, weapons and war | Leave a comment

Is there really a nuclear weapon in space?

CASSANDRA STEER, The Interpreter, 18 Feb 24

Calm down, Congressman.

Alarm was raised in the media this week about a “national security threat” to the United States from Russia, ostensibly a nuclear space-based weapon. The news came after the Republican chair of the US House of Representatives intelligence committee, Mike Turner, unusually went public with an allegation based on classified intelligence that had not yet been properly discussed across the National Security briefing channels.

The fact that a cryptic, public allegation was made about a threat in space, combined with repetitions of one unnamed source referring to a potential nuclear capability, has led to some sensationalised news articles, and a lot of misleading conclusions, that Russia has a nuclear space weapon. Lack of clarity can lead to misunderstanding, misinterpretations, and possible missteps, which are in fact the biggest threats to space security.

This news is useful in terms of raising awareness of the high stakes in space security. But as became clear when White House National Security Communications Adviser John Kirby spoke earlier today, this potential capability does “not pose an urgent threat to the United States”– i.e.: it doesn’t yet exist.

We do know all the great powers, many middle powers and even smaller nations are developing counter-space capabilities, most of which are non-kinetic, and the most effective of which have temporary, but highly impactful effects. But this is not “Star Wars”, there are no space-based nuclear weapons.

Space is critical to national, regional and international security, because of how integral space-based services are to civil life and military operations. Satellites have been key military sources of intelligence, surveillance and reconnaissance (ISR) since the 1960s, and continue to be so today. Space-based communications, internet and navigation (such as GPS) are part of our daily lives without most of us thinking about where they come from, and they are a major source of military communications, operational navigation on land, at sea and in the air, as well as guidance for precision weapons.

Because of these high dependencies, space has itself become a strategic domain. In recent decades, increasingly sophisticated counter-space capabilities have been developed globally to interfere with these systems. The most effective way to compromise an adversary’s eyes and ears is to interfere with their space systems, whether by jamming a signal, listening in on a signal, spoofing a false positioning signal, or undertaking a cyberattack on a satellite operation. These are all temporary, reversible means of targeting a satellite or the signals and data it sends to Earth. There is a reason these means are preferred over kinetic, destructive means.

Nuclear weapons (and weapons of mass destruction) are the only type of weapon prohibited in the 1967 Outer Space Treaty, in article IV. The Soviets and the United States, together with many other countries, were able to agree on this treaty at the height of the Cold War, because they realised that strategic restraint was the only way to ensure they would both continue to have access to this new critical domain. In other words, after their own nuclear and Electro-Magnetic Pulse tests in the 1960s, they realised there was no way to contain the effects of such weapons, and their own capabilities would be impacted. A lose-lose scenario.

Perhaps the strongest lessons came from the US nuclear test known as Starfish Prime, which took out US, UK and other national satellite capabilities, reaching from the east coast of the United States to Australia. US and Soviet decision-makers realised they needed to secure their own access to space by prohibiting such weapons, and other countries pushed to ensure these superpowers would not take nuclear war to space, denying access to space for others………………………………………………………………………………. more https://www.lowyinstitute.org/the-interpreter/there-really-nuclear-weapon-space

February 20, 2024 Posted by Christina Macpherson | space travel, weapons and war | Leave a comment

What are Russia’s Top 5 Anti-Satellite Systems?

Sputnik, 15 Feb 24

Russia has effective means to thwart adversary satellites, including arms based on new physical principles. What are they?

Moscow trashed the groundless rumors of its alleged efforts to deploy a nuclear anti-satellite system in space on February 15.

A day earlier, mainstream US media claimed that Washington had informed Congress and its European allies about Russia’s work on a new, space-based nuclear weapon designed to undermine the US satellite network.

A new bugaboo about Russia’s supposed plans to destroy American satellites with nuclear arms is aimed at ramming a $60 billion funding package for Ukraine through US Congress, military analyst and editor-in-chief of the National Defense magazine Igor Korotchenko told Sputnik on Thursday. Even though the package in question was earlier passed in the US Senate as part of a $95 billion bill, the chances of the House approving the legislation is considered slim.

According to Korotchenko, Russia has cheaper and more effective means of anti-satellite warfare than those that Washington accuses it of developing.

This is a question of approaches. The fact is that the deployment of nuclear weapons in space is ineffective in terms of its use, especially given that Russia has much simpler and cheaper means to disable, in the event of hostilities, a significant part of the US satellite constellation,” the expert underscored.

Sputnik has taken a look at the systems that could do the job.

The Nudol System

On November 15, 2021, Moscow conducted a direct-ascent hit-to-kill anti-satellite (ASAT) test using the A-235 Nudol anti-satellite system. The test shot down an old Soviet reconnaissance satellite launched back in 1982.

The A-235 Nudol is an improved modification of the A-135 Amur strategic missile defense system. The missile can hit a target at a distance of up to 1,500 kilometers (versus 850 kilometers for the A-135), while its interception speed is increased to Mach 10 (versus Mach 3.5 for the A-135).

In contrast to its predecessor, the A-235 may use kinetic force, not nuclear or high-explosive fragmentation, to destroy the target.

The development of the A-235 Nudol started in 1985-1986 and was carried out in compliance with international ballistic missile agreements existing at the time. The weapon was designed to become the first Soviet mobile missile defense system capable of intercepting intercontinental-range missiles, spacecraft and satellites operating at high orbits.

Immediately after the Cold War, the development of the A-235 was suspended and restarted in 2011 by Almaz-Antey, nine years after the Bush administration unilaterally terminated the Antiballistic Missile Treaty (ABM) in 2002.

The system has been tested several times since 2014; however, in November 2021 the missile was fired at a specific moving space target and eventually destroyed it, causing a fuss in the Pentagon.

Nanosatellites: Nivelir, Burevestnik and Numismat

The development of Russia’s secretive project Nivelir (“Leveler”) has reportedly been carried out by the Central Scientific Research Institute of Chemistry and Mechanics Named after D.I. Mendeleyev since 2011.

The endeavor supposedly envisaged building small satellites designed to inspect other satellites in space. The first three satellite-inspectors were reportedly attached to three communications satellites launched between 2013 and 2015.

According to other sources, Russia has been experimenting with satellite inspectors since 2017. The satellites maneuvered in orbit, moving away from each other and then getting closer. In 2019, the Cosmos-2535 and Cosmos-2536 devices were launched. Their goal was to study the impact of “artificial and natural factors of outer space” on Russia’s space devices and to develop “technology for their protection.”…………………………………..

The Kontakt System

The USSR started to develop the 30P6 Kontakt (“Contact”) system in 1983. The 79М6 munition – a three-stage rocket – was supposed to be mounted on the MiG-31D fighter-interceptor.

Launched from an airplane at an altitude of 15 kilometers the munition was designed to fire a fragmentation warhead into space. It was assumed that the Kontakt system would be a stealth and inexpensive means of destroying enemy satellites……………………………………………………….

The Tirada Electronic Warfare System

According to the Russian Ministry of Defense, the Tirada-2S radio-electronic communication suppression system is capable of electronically jamming satellite communications with complete disabling. In this case, satellites can be deactivated directly from the Earth’s surface.

There is little information about the system’s specifications in the public domain. …………………………………………………………………………………..

The Peresvet Laser System

On March 1, 2018, Russian President Vladimir Putin first mentioned Russia’s laser weapon for air defense and anti-satellite warfare, the Peresvet, during his address to the Federal Assembly………………………………………….

The aforementioned systems are just a few of those potentially developed by the Russian military-industrial complex, indicating that Russia is capable of using its decades-long scientific and technological potential to ensure the nation’s security in the event of a large-scale conflict. https://sputnikglobe.com/20240215/what-are-russias-top-5-anti-satellite-systems-1116802215.html

February 17, 2024 Posted by Christina Macpherson | space travel, weapons and war | Leave a comment