{"id":16362,"date":"2023-09-04T06:10:24","date_gmt":"2023-09-04T04:10:24","guid":{"rendered":"https:\/\/thesmartcityjournal.cibeles.net\/sin-categoria\/preventing-outer-space-from-becoming-a-hazardous-junkyard\/"},"modified":"2024-11-20T12:31:24","modified_gmt":"2024-11-20T11:31:24","slug":"preventing-outer-space-from-becoming-a-hazardous-junkyard","status":"publish","type":"post","link":"https:\/\/www.thesmartcityjournal.com\/en\/environment\/preventing-outer-space-from-becoming-a-hazardous-junkyard","title":{"rendered":"Preventing outer space from becoming a hazardous junkyard"},"content":{"rendered":"

As the number of objects launched into orbit grows, the EU is working to prevent debris from getting out of hand<\/p>\n

An upsurge in worldwide rocket and satellite launches into space means collisions are an increasing danger that EU research projects are seeking to curb.<\/p>\n

The number of satellites in space may exceed 100 000 by 2030, according to forecasts<\/a>. Small satellites are increasingly being sent into low orbits 500 to 1 000 kilometres above Earth to do everything from improve remote communications to guide driverless cars.<\/p>\n

Collision alarm<\/h2>\n

\u2018There is an increasing amount of debris in space,\u2019 said Anthony Caron, future programmes manager at a French space-observation company called Share My Space. \u2018More and more debris implies more and more collision probability \u2013 and the problem is real now. There are lots of events where you have to perform manoeuvres to avoid collisions.\u2019<\/p>\n

Toulouse-based Share My Space leads a research project that received EU funding to compile the first independent catalogue of 100 000 pieces of space debris measuring under 10 centimetres. The two-year initiative, named CASSIOPEE<\/a>, runs until the end of January 2024.<\/p>\n

Organisations that launch satellites and rockets need information to avoid spacecraft collisions and currently have a limited amount to rely on besides US data, according to Caron. Such information is also important for developing largely absent rules on activities in space and preventing it from becoming a lawless frontier.<\/p>\n

The downstream market of the Global Navigation Satellite System, or GNSS, will grow from \u20ac199 billion in 2021 to \u20ac492 billion in 2031, according to the EU<\/a>. <\/p>\n

In 2009, the first known accidental collision between two satellites presaged a potentially perilous future. The crash involving an Iridium 33 and Cosmos 2251 satellite released thousands of pieces of debris into space.<\/p>\n

Even tiny fragments could have a catastrophic impact because they travel at about 10 times the speed of a bullet.<\/p>\n

Crowding-out risk<\/h2>\n

Such \u201cspace junk\u201d includes no-longer-operational spacecraft, abandoned sections \u2013 or stages \u2013 from rockets, fragments from anti-satellite missile tests and even paint flecks that have eroded from an object over time.<\/p>\n

Caron cited a possible scenario outlined in 1978 by an American astrophysicist named Donald Kessler: with growing debris, a collision triggers a cascade of further crashes that render space useless.<\/p>\n

\u2018The worst-case scenario is this Kessler syndrome where you cannot use space anymore,\u2019 said Caron.<\/p>\n

Fragments as tiny as 1 cm across or less are enough to knock out a satellite, according to Caron. The US National Aeronautics and Space Administration estimates there are half a million fragments of at least 1 cm and 100 million with a minimum size of 1 millimetre.<\/p>\n

Telescope stations<\/h2>\n

Share My Space has set up its first multi-telescope station at an as-yet undisclosed location in Europe and is installing observation equipment there that the company previously tested in Paris. More stations are planned elsewhere.<\/p>\n

The system comprises four telescopes that rotate in coordination with objects\u2019 transit time in the field of view. Software processes data to generate collision alerts for space operators.<\/p>\n

As the catalogue of objects expands and the detectable fragment size falls with advances in Share My Space\u2019s technology, the ultimate aim is to be able to track items as small as about 2 cm, according to Caron.<\/p>\n

He said the system seems to have worked well so far.<\/p>\n

\u2018We are seeing objects which are known from the US catalogue while we are also seeing non-catalogued objects,\u2019 said Caron. \u2018The goal is to be able to predict their orbits based on our own observations and add this information to our catalogue.\u2019<\/p>\n

The raw data can then be used to gauge risk-collision probabilities as well as to help organisations trying to clean up space junk. Share My Space, for example, has signed a contract with a Japanese company \u2013 Astroscale \u2013 that is developing services for debris removal.<\/p>\n

Rules of the game<\/h2>\n

Another EU-funded project, Stardust-R<\/a>, has also been plotting a path towards a sustainable future in space. This research initiative ended in June 2023 after four and a half years.<\/p>\n

The coordinator, Professor Massimiliano Vasile, argues for a far-reaching approach for preventing collisions even before delving deeper into debris removal.<\/p>\n

\u2018You don\u2019t just want to mitigate the risk of a collision but also have a sustainable space economy,\u2019 said Vasile, a space-systems engineer at the University of Strathclyde in the UK.<\/p>\n

Stardust-R developed technological tools to help optimise the commercial and scientific opportunities of space and to predict and mitigate collisions of objects.<\/p>\n

\u2018The problem is increasing much faster than what people might have expected,\u2019 said Vasile. \u2018And it has grown largely unregulated, as airspace on Earth can be confined quite easily but you don\u2019t have territorial space in space. Institutions are trying to catch up.\u2019<\/p>\n

He said another difficulty with space warrants better tracking: when satellites or other space vessels malfunction, it\u2019s hard to know whether the cause was a collision with a tiny object.<\/p>\n

In addition, big extra costs can be incurred when inaccurate information causes a spacecraft to make an unnecessary manoeuvre, according to Vasile.<\/p>\n

Lasting impact<\/h2>\n

Aided by data from partners including the European Space Agency and France\u2019s National Centre for Space Studies \u2013 whose involvement highlights the capacity of EU research to pool resources, foster cross-border collaboration and tap local expertise \u2013 the Stardust-R team explored a range of mitigation instruments.<\/p>\n

These included an artificial-intelligence system to forecast when spacecraft need to manoeuvre. This was tested on past actual scenarios and on made-up ones.<\/p>\n

\u2018In these scenarios, we know that the algorithm is working because it responded with manoeuvres that avoided a collision,\u2019 said Vasile.<\/p>\n

Stardust-R also produced computational models for tracking the likelihood of collisions and the origin of debris. Furthermore, it looked at ways to use lasers for removing debris and algorithms and artificial vision in robots for conducting in-orbit repairs or satellite removal.<\/p>\n

Vasile is counting on the work of Stardust-R researchers to have an impact long after the project.<\/p>\n

\u2018My hope is that some of these technologies are adopted in the future,\u2019 he said. \u2018We need more investment and development, but I think we\u2019re on the right track.\u2019<\/p>\n

Author<\/strong><\/em><\/p>\n

GARETH WILLMER<\/p>\n

Research in this article was funded by the EU via the European Innovation Council (EIC) and the Marie Sk\u0142odowska-Curie Actions (MSCA). <\/em><\/p>\n

This article was originally published\u202fin <\/em>Horizon<\/a><\/em>, the EU Research and Innovation Magazine. <\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

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