Starlink's Signal Leakage Is Threatening Radio Astronomy's Most Critical Frequencies - Gadget Review

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Home / Emerging TechStarlink’s Signal Leakage Is Threatening Radio Astronomy’s Most Critical FrequenciesCurtin University study finds SpaceX hardware leakage up to 10,000 times stronger than the cosmic signals SKA-Low must detectRex EdisonRex EdisonXLinkedInFacebookI reincarnated in Charleston, SC and currently live in Los Angeles, CA. A sacred rebel at heart, I believe in cooperation over competition and speaking my truth even if it ruffles a few feathers.All Articles by Rex Edison→ByRex EdisonRex EdisonLinkedInTwitterFacebookI reincarnated in Charleston, SC and currently live in Los Angeles, CA. A sacred rebel at heart, I believe in cooperation over competition and speaking my truth even if it ruffles a few feathers.All Articles byRex Edison→ Sep 9, 2026·
2 min read Image: SpaceXKey TakeawaysKey TakeawaysStarlink satellites emit unintended signals 10,000 times stronger than target cosmic signals.Researchers detected 112,534 Starlink emissions contaminating ITU-protected radio astronomy frequency bands.Current ITU regulations ignore unintended satellite hardware leakage, leaving astronomers without legal protection.Astronomers spent decades designing the Square Kilometre Array Low (SKA-Low) to hear the faintest whisper in the observable universe — neutral hydrogen signals from the cosmic dawn, when the first stars flickered on roughly 13 billion years ago. What they’re picking up instead is electronic leakage from SpaceX satellites. Not the broadband beams Starlink intentionally transmits. The accidental static bleeding from onboard hardware, coupling through satellite structures and radiating across frequencies nobody authorized.A Curtin University team using the Engineering Development Array 2 — a prototype SKA-Low station in Australia — analyzed approximately 76 million radio images over 29 days. The results, published in Astronomy & Astrophysics, are uncomfortable reading. Researchers catalogued 112,534 individual radio emissions from 1,806 unique Starlink satellites across 73–235 MHz, the exact frequency range SKA-Low needs. Some satellites emit periodic 13-kHz tones at roughly 137 MHz every 100 seconds. These aren’t scheduled downlinks that operators can plan around. They’re unpredictable hardware leakage — and researchers cannot subtract a signal they cannot model.The numbers tell the story bluntly:112,534 emissions detected from 1,806 unique Starlink satellitesLeakage reaching up to 10⁶ Jy/beam; early-universe hydrogen signals require sensitivity near 10⁻⁵ JyStarlink signals reportedly around 10,000 times stronger than the cosmic signals SKA-Low is built to detectUp to 30% of images at some frequencies contained Starlink interferenceEmissions found inside two ITU-protected bands — 73–74.6 MHz and 150.05–153 MHz — where signals aren’t supposed to exist at all“Comparable to the brightest natural radio sources in the sky.” — Steven Tingay, Curtin University, on Starlink’s leaked emissionsWhat SKA-Low is hunting demands almost incomprehensible sensitivity. Trying to detect those ancient hydrogen signals with Starlink overhead is like attempting to hear a conversation from 13 billion years ago while your neighbor runs a subwoofer at full volume. The contamination doesn’t just degrade data quality — it risks rendering entire frequency bands scientifically unusable.The Rules Don’t Cover ThisCurrent international frameworks leave unintended satellite emissions in a regulatory gray zone, even when those emissions land inside protected astronomy bands.Here’s the structural problem: nobody is technically breaking any rules. The International Telecommunication Union (ITU) protects certain radio astronomy bands from intentional transmissions. Unintended electromagnetic radiation — hardware leakage — sits largely outside that framework, legally invisible even when it bleeds into protected spectrum. Think of it as the radio equivalent of noise ordinances that cover deliberate sound but ignore a neighbor’s HVAC system, no matter how loud it runs at 3 a.m.SpaceX has engaged constructively before — satellite visors reduced optical brightness, and an NSF coordination agreement addressed higher-frequency radio bands. But beam management doesn’t fix low-frequency hardware leakage. The ITU is reportedly discussing the issue, though discussion isn’t regulation, and the constellation already exceeds 6,000 satellites. Researchers shared their findings with SpaceX, who are reportedly open to dialogue on future hardware changes. Algorithmic mitigation is being explored, but scientists describe it as “embryonic” — potentially demanding computing power that rivals the science processing itself.Engineering fixes are the real answer, the same way design changes addressed optical brightness. The question isn’t just what’s happening to astronomers — it’s who decides what the radio sky is worth protecting, and whether that decision gets made before the window closes.Share this You Might Also Like_• Dutch Scientists Are Turning Office Urine Into Electricity
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A study conducted by a team at Curtin University analyzed radio emissions from Starlink satellites and revealed significant signal leakage that threatens radio astronomy. Researchers discovered that the unintended electromagnetic radiation emitted by the hardware on these satellites is up to ten thousand times stronger than the faint cosmic signals that observatories aim to detect. Specifically, the analysis cataloged 112,534 individual radio emissions originating from 1,806 unique Starlink satellites across the frequency range crucial for the Square Kilometre Array Low (SKA-Low), which is designed to detect extremely faint neutral hydrogen signals from the cosmic dawn.

These leaked emissions are not the intended broadband transmissions but rather accidental static bleeding from onboard hardware coupling through satellite structures and radiating across unauthorized frequencies. Some satellites emit unpredictable signals, such as periodic thirteen kilohertz tones at approximately one hundred thirty seven megahertz every one hundred seconds, which are not part of planned downlink operations. The detection results indicate that these leaked signals can reach intensities up to ten to the power of six joules per beam, creating substantial interference. Furthermore, the findings show that up to thirty percent of images at certain frequencies are contaminated by this Starlink interference, with some emissions found within radio bands that are supposedly protected by the International Telecommunication Union (ITU).

The core issue stems from a regulatory gap; current international frameworks protect radio astronomy bands from intentional transmissions but fail to account for unintended electromagnetic radiation resulting from satellite hardware leakage, leaving astronomers without legal recourse. While SpaceX has engaged in discussions regarding optical brightness and higher-frequency bands, this limitation does not address the low-frequency hardware leakage. The International Telecommunication Union is reportedly discussing the issue, yet this discussion does not translate into binding regulation, compounding the problem as the Starlink constellation grows beyond six thousand satellites.

Detecting the ancient hydrogen signals sought by SKA-Low requires near-incomprehensible sensitivity, and the presence of this massive, unpredictable electronic leakage introduces contamination that risks rendering entire frequency bands scientifically unusable. The research highlights that engineering fixes, mirroring previous approaches to managing optical brightness, are the necessary solution, as algorithmic mitigation is currently described as embryonic and potentially computationally demanding. The situation underscores a critical question regarding the protection of the radio sky and the need for regulatory mechanisms that address unintended hardware emissions before further development causes irreparable scientific loss.