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01 stycznia 197001 stycznia 1970  0 comments  Bez nazwy

 

Presently, GPS satellite signals enable you to contact your mother, supply electricity to your residence, and aid in the safe landing of your plane; yet, an inexpensive plastic box can obstruct these vital services.


In San Diego, California, a traffic disruption unfolded just after noon. Air traffic controllers at the airport observed that the system designed for monitoring incoming flights was inoperative. Concurrently, the emergency pagers employed to notify doctors at the Naval Medical Center also failed to function. Furthermore, the traffic management systems that facilitate the navigation of ships experienced outages, endangering order at the busy port. On the streets, residents attempted to use their cell phones, only to find no signal, while bank customers were unable to withdraw cash from local ATMs. This situation continued for another two hours.


It required three days to uncover the reason behind the puzzling incident that took place in January 2007. During this period, two Navy ships were performing training exercises in the Port of San Diego. To assess the response procedures for potential communication failures, technicians deliberately jammed radio signals. This action unintentionally obstructed the GPS satellite signals over a vast area of the city.


Why do GPS outages cause so much disruption?


Satellite signals now serve a purpose far beyond guiding your car's navigation system. GPS has transformed into an "invisible utility" that we often take for granted. Mobile network operators leverage GPS time signals to ensure effective communication between your device and the network towers. Utility companies harness GPS technology to synchronize their grids when they are interconnected. Additionally, banks and stock exchanges utilize satellite systems to create timestamps, which help in fraud prevention. At the same time, our society's reliance on GPS navigation is steadily intensifying.


Some individuals express concern over our increasing dependence on technology that is prone to failure, noting that significant disruptions can occur without the need for extreme military exercises. A major point of concern is the use of GPS jammers-small devices that can be mounted on a car's dashboard. These devices are easily accessible online and are often employed by individuals, such as truck drivers, who prefer to keep their locations hidden from their employers. The growing use of these jammers has resulted in issues at airports and has caused cellphone signal interruptions in numerous cities. When unobstructed, a jammer can disrupt GPS signals from several kilometers away. Therefore, it is understandable that researchers worldwide are striving to develop methods to prevent serious GPS outages.


Stealth Utility


The implications of GPS failure today extend beyond mere navigation issues. Donald Jewell, a key figure in the establishment of GPS in the U.S. Air Force and the current editor-in-chief of GPS World magazine, emphasizes that our dependence on GPS is often subconscious. He estimates that there are more than a billion GPS receivers in operation, with over 90 percent utilizing the satellite signals primarily for their accurate timing.


The stealth capability is predominantly employed by cell phones. When users are in transit, it is essential for towers to synchronize with one another to facilitate the transfer of calls, and GPS time signals provide a cost-effective and accurate solution for this purpose. Furthermore, the timing offset associated with each tower is utilized for its identification. Indeed, various wireless communication technologies depend on GPS timing for synchronization. This dependency may explain the disruptions experienced by traffic control and emergency pagers at the Port of San Diego in 2007.


Truck Cheating


Last purposefully constructed a straightforward, commercially accessible jammer. Although the use of such low-tech devices is illegal in the United States, the United Kingdom, and many other countries, they can be acquired online for as little as $30. Sellers assert that these devices serve privacy-related functions. Their capacity to block devices that track a vehicle's movements has made them popular among truck drivers who prefer to avoid electronic monitoring in their cabs. Furthermore, they can obstruct GPS-based tolls that are charged through onboard receivers. Some criminals utilize them to disable trackers within stolen cargo. "At first, we assumed that the jammers were crafted in a bedroom by a young man with acne," remarks Last. "Now, however, they are manufactured in factories in China."

 

 

 

Tagi: tin box 

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