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SETI Institute Researchers Engage in World's First Real-Time AI Search for Fast Radio Bursts

08/10/2024

This summer, scientists supercharged their tools in the hunt for signs of life beyond Earth.

Researchers at the SETI Institute became the first to apply AI to the real-time direct detection of faint radio signals from space. Their advances in radio astronomy are available for any field that applies accelerated computing and AI.

We're on the cusp of a fundamentally different way of analyzing streaming astronomical data, and the kinds of things we'll be able to discover with it will be quite amazing, said Andrew Siemion, Bernard M. Oliver Chair for SETI at the SETI Institute, a group formed in 1984 that now includes more than 120 scientists.

The SETI Institute operates the Allen Telescope Array (pictured above) in Northern California. It's a cutting-edge telescope used in the search for extraterrestrial intelligence (SETI) as well as for the study of intriguing transient astronomical events such as fast radio bursts.

Germinating AI The seed of the latest project was planted more than a decade ago. Siemion attended a talk at the University of California, Berkeley, about an early version of machine learning, a classifier that analyzed radio signals like the ones his team gathered from deep space.

I was really impressed, and realized the ways SETI researchers detected signals at the time were rather naive, said Siemion, who earned his Ph.D. in astrophysics at Berkeley.

The researchers started connecting with radio experts in conferences outside the field of astronomy. There, they met Adam Thompson, who leads a group of developers at NVIDIA.

We explained our challenges searching the extremely wide bandwidth of signals from space at high data rates, Siemion said.

SETI Institute researchers had been using NVIDIA GPUs for years to accelerate the algorithms that separate signals from background noise. Now they thought there was potential to do more.

A Demo Leads to a Pilot It took time - in part due to the coronavirus pandemic - but earlier this year, Thompson showed Siemion's team a new product, NVIDIA Holoscan, a sensor processing platform for processing real Ntime data from scientific instruments.

Siemion's team decided to build a trial application with Holoscan on the NVIDIA IGX edge computing platform that, if successful, could radically change the way the SETI Institute worked.

The institute collaborates with Breakthrough Listen, another SETI research program, headquartered at the University of Oxford, that uses dozens of radio telescopes to collect and store mountains of data, later analyzed in separate processes using GPUs. Each telescope and analysis employs separate, custom-built programs.

We wanted to create something that would really push our capabilities forward, Siemion said. We envisioned a streaming solution that in a more general way takes real-time data from telescopes and brings it directly into the GPUs to do AI inference on it.

Pointing at the Stars In a team effort, Luigi Cruz, a staff engineer at the SETI Institute, developed the real-time data reception and inference pipeline using the Holoscan SDK, while Peter Ma, a Breakthrough Listen collaborator, built and trained an AI model to detect fast radio bursts, one of many radio phenomena tracked by astronomers. Wael Farah, Allen Telescope Array project scientist, provided key contributions to the scientific aspects of the study.

They linked the combined real-time Holoscan pipeline, running on an NVIDIA IGX Orin platform, to 28 antennas pointed at the Crab Nebula. Over 15 hours, they gathered more than 90 billion data packets on signals across a spectrum of 5GHz.

Their system captured and analyzed in real time nearly the full 100Gbps of data from the experiment, twice the previous speed the astronomers had achieved. What's more, they saw how the same code could be used with any telescope to detect all sorts of signals.

It's Like a Magic Wand' The test was fantastically successful, said Siemion. It's hard to overstate the transformative potential of Holoscan for radio astronomy because it's like we've been given a magic wand to get all our data from telescopes into accelerated computers that are ideally suited for AI.

He called the direct memory access in NVIDIA GPUs a game changer.

Rather than throw away some of its data to enable more efficient processing - as it did in the past - institute researchers can keep and analyze all of it, fast.

It's a profound change in how radio astronomy is done, he said. Now we have a viable path to a very different way of using telescopes with smart AI software, and if we do that in a scalable way the opportunities for discovery will be legion.

Scaling Up the Pilot The team plans to scale up its pilot software and deploy it in all the radio telescopes it currently uses across a dozen sites. It also aims to share the capability in collaborations with astronomers worldwide.

Our intent is to bring this to larger international observatories with thousands of users and uses, Siemion said.

The partnerships extend to globally distributed arrays of telescopes now under construction that promise to increase by an order of magnitude the kinds of signals space researchers can detect.

Sharing the Technology Broadly Collaboration has been a huge theme for Siemion since 2015, when he became principal investigator for Breakthrough Listen.

We voraciously collaborate with anyone we can find, he said in a video interview from the Netherlands, where he was meeting local astronomers.

Work with NVIDIA was just one part of efforts that involve companies and governments across technical and scientific disciplines.

The engineering talent at NVIDIA is world class I can't say enough about Adam and the Holoscan team, he said.

The software opens a big door to technical collaborations.

Holoscan lets us tap into a d
LINK: https://blogs.nvidia.com/blog/seti-institute-ai-fast-radio-bursts/...
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