Impact of Wireless Traffic on Astronomical Measurements
Scientists who measure the position of the Earth in the universe with millimeter precision have been grappling with a growing problem over the years. The exponential increase in wireless traffic —from WiFi connections to satellite Internet and mobile data networks—is interfering with astronomical observations that are vital for accurately locating our planet in the cosmos. This issue is not just a quirky anomaly; without precise measurements, everyday services like GPS , online banking, and global supply chains could face significant disruptions.
Geodesy: The Science of Earth Positioning
To ensure that satellites function correctly , we need to know their exact positions at all times. This task hinges on geodesy, a science that establishes precise reference frameworks utilizing astronomical objects as anchor points. The most stable and distant reference points we know of are supermassive black holes located in the centers of distant galaxies. As these black holes consume stars and gas, they emit radiation jets that radio telescopes can detect through a technique known as very long base interferometry .
Network Saturation: A Growing Concern
Radiotelescopes require specific frequencies from the radioelectric spectrum to capture weak signals from deep space effectively. For decades, this ‘traffic’ was scarce, allowing scientists to utilize bands not exclusively reserved for astronomy. However, this situation has changed drastically. With six generations of mobile telecommunications, the rise of powerful WiFi networks, and a growing number of satellites beaming the Internet directly to Earth, the spectrum is now saturated. Terrestrial signals have become so intense that they obstruct geodesic observatories, rendering them unable to ‘see’ through the noise.
The Risk of Collapse
The “global geodetic supply chain” underpins modern technological infrastructure. Without precise measurements of the Earth’s position, satellite navigation systems would lose accuracy, electrical networks might go offline, and international trade could face severe disruption. Hence, the importance of radio telescopes and other technologies designed for precise measurements cannot be overstated; their continued functionality is pivotal for the work of geodesists and the service of modern society.
Solutions: Releasing More Frequencies
Geodesists are advocating for the release of more frequencies dedicated to astronomy within the radio spectrum. Achieving this requires international treaties to be revised during global conferences. Ideas such as establishing radio-silence zones around key telescopes, as well as agreements with satellite operators to minimize emissions, are being explored. A well-known example is the community of Green Bank, which prohibits mobile networks due to existing civil and military radio needs.
Any viable solution must be global, given that geodetic measurements rely on interconnected telescopes situated across all continents . However, the initial step toward finding a resolution is cultivating awareness of this pressing issue.
Cover image | Juan de Dios Santander Vela
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