Paul Brekke, a senior advisor at the Norwegian Space Agency and a solar physicist, presented a thought experiment titled "Day Without Satellites" at a specialized navigation forum. The scenario models the hypothetical sudden shutdown of all artificial Earth satellites and allows us to assess how dependent modern civilization is on orbital infrastructure. According to the expert's assessment, the consequences of such an accident would not be instantaneous but rather escalating: at first, life would continue in its usual rhythm, and then a chain reaction of failures would affect navigation, communications, logistics, and even weather forecasting.
The First Hours: The Illusion of Normality
According to the scenario, in the first hours after the accident, everyday life would look almost unchanged. Airplanes would remain in the air, water and electricity supplies in cities would not be interrupted, and most people would notice nothing unusual. It is precisely this "quiet" phase, as the author of the experiment intended, that makes the threat insidious: critical systems are still working, but their ability to keep functioning has already been called into question.
Atomic Clocks in Orbit: Why Time Is the Key Problem
The main technical problem in the scenario lies in the fact that GPS satellites act as ultra-precise atomic clocks, transmitting synchronized time signals to Earth. This synchronization is critically important for civilian infrastructure: the loss of precise time leads to the accumulation of errors that would quickly tear apart global internet traffic. At the same time, emergency services would lose access to geolocation systems, and delays would begin in ground and air transportation.
Who Would Be Cut Off from the World
The shutdown of satellites would instantly cut off from the world any territories that lack alternative communication channels. Cargo ships in the Arctic, fishing vessels in the South China Sea, and rescue teams in remote areas would be left without communication, since laying physical cables there is impossible. Military forces would lose the ability to coordinate the movement of troops and aircraft, and civilian commercial flights would lose contact with air traffic control during long-haul flights that pass outside the range of ground-based radars.
Blow to Meteorology and Safety
Meteorology would also take a significant hit. Although forecasters continue to use weather balloons and ground stations, modern forecasting is almost entirely based on satellite data. Without observation of the open ocean, storms would form unnoticed, posing a direct threat to maritime and air vessels. Thus, even with the ground network still operating, the accuracy and timeliness of forecasts would drop sharply.
Space Debris: The Main Real Threat
Although a sudden solar storm or a complete shutdown of all vehicles is considered unlikely, space agencies are concerned about a more real threat — space debris. According to a report by the European Space Agency (ESA) on the space environment, there are about 40,000 large objects in orbit, and the number of small fragments larger than 1 centimeter exceeds 1.2 million units. Each of them moves at a speed sufficient to completely destroy a satellite upon collision. The agency's models show that even with a complete cessation of future rocket launches, the amount of debris in orbit would continue to grow for more than 200 years due to a chain reaction of new collisions. Engineering solutions for cleaning up orbit using nets, harpoons, or towing have not yet been scaled up.
Agency Conclusions and Growing Dependence
The U.S. Department of Homeland Security and the UN Global Geodetic Center, in their research, concluded that a prolonged satellite outage would have a devastating effect on logistics, agriculture, maritime shipping, and the banking sector. The key conclusion of the experts is that humanity's dependence on space technology continues to grow in proportion to the increase in the number of new vehicles in orbit, and therefore the vulnerability of critical infrastructure to their loss increases with every launch.
