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Owners of a residential complex in Sichuan are worried about the radiation of mo
Jammer B. | 27.06.2024 
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Starting from October 6, mobile phone signals suddenly weakened or even disappeared inside and outside the Huayi Sunshine Community in Pidu District, Chengdu City, Sichuan Province, with China Mobile being the most obvious. It turned out that due to the weak mobile phone signal in the community, the operator was opposed by some owners when setting up signal equipment in the community during the National Day holiday, which alarmed the local information data center and the police. https://www.silencejammer.com...-cell-phone-blocker
Three days later, a joint notice signed by China Telecom, China Unicom, China Mobile and the tower company appeared at the entrance of the community, "Due to the notice from the property management, some residents in the community complained that the mobile phone signal equipment in the community interfered with the normal life of these owners. After communication and explanation failed, the three major operators will interrupt and stop the operation of all mobile phone signal equipment in the community."
Located in a prosperous area, the community has become a mobile phone signal "jammer"
Originally located in a prosperous area with commercial and residential areas, the Huayi Sunshine Community in Pidu District has recently become a mobile phone signal "jammer". Outside the gate of the community, the signal on the reporter's hand was flickering. The China Unicom phone card was slightly better, but the mobile phone card would occasionally lose signal and last for a long time.
The owner of the fruit and vegetable store at the entrance of the community was unusually idle throughout the morning. The less than 200 yuan he received on WeChat proved this point. "Usually, WeChat would receive nearly 1,000 yuan in the morning, just because the signal was not good. Many customers could not transfer money by scanning the code on their mobile phones, and they did not bring cash, so they finally did not buy anything." The other party said that this situation has lasted for several days. https://www.silencejammer.com
Next to the fruit and vegetable store, Hongqi Supermarket, convenience store, etc., all encountered the same situation without exception. A supermarket cashier said that after the customer selected the items, he found that he could not scan the code to pay, and put the items back awkwardly and left. The other party took out his mobile phone, and the mobile signal was very weak. "Sometimes the phone could not be dialed." The reporter walked into the supermarket, and the mobile signal disappeared. The reporter asked the owners in and out of the community one by one, and most of them said that the mobile phone signal in the community has always been poor, "It is very inconvenient to make calls at home, and you can't receive calls." So, how could such a situation occur in a commercial and residential community with thousands of people?
On the rooftop of the 30th floor of Unit 1, Building 7, the wires of the signal amplifier were damaged.
What is the reason?
Property manager Hu Deyu said that since moving in in 2015, the mobile phone signal in the community has been very poor. "Our property is in the commercial area outside the community. As long as I walk into the office, no one can contact me. Complaints about poor mobile phone signals have never stopped." A staff member of the Pidu District Information Data Center said that the poor signal in the community is related to the dense density of this building. In addition, the number of owners moving in is increasing, and the mobile signal equipment cannot keep up. The community property has repeatedly asked the operator to add mobile phone signal equipment.
During the National Day holiday, engineers from the mobile company entered the community and set up new mobile phone signal equipment on the rooftop of the elevator apartment building. Some owners discovered and were blocked. The conflict was imminent. The owners who opposed the new mobile signal equipment found the property and asked for it to be removed. The reporter contacted two owners who held opposing opinions. The other party said: "The new equipment has radiation and will cause harm to the human body. Now the mobile phone signal can be used and is not bad."
New Zealand schools to ban mobile phones to improve education quality
Jammer B. | 26.06.2024 0 0
New Zealand Prime Minister Christopher Luxon recently announced that a nationwide ban on mobile phones will be implemented in schools. The decision is a key initiative by Luxon's new government to combat New Zealand's declining literacy levels. https://www.silencejammer.com...-cell-phone-blocker
New Zealand's literacy scores were once among the best in the world, but now reading and writing standards have dropped significantly, leading researchers to call it a "classroom crisis". Luxon said he would push for the ban within 100 days of taking office and learn from similar policies in the United States, Britain and France.
Luxon explained that the policy will help reduce disruptive behavior in the classroom and improve student concentration. "Our goal is to allow students to focus on learning while enabling teachers to better teach the curriculum," he said.
According to a report by New Zealand charity Education Hub, more than one-third of 15-year-old children will be barely able to read and write in 2022, reflecting the serious literacy crisis facing the country. Researchers stress steps must be taken to improve literacy in New Zealand.
Luxon's conservative government was sworn in on November 27 and faced controversy in its first week in office when it unexpectedly rolled back a world-leading anti-smoking measure. Former Prime Minister Jacinda Ardern's government introduced a "generational smoking ban" that banned the sale of cigarettes to people born after 2008. Doctors have warned New Zealand faces a looming public health "tragedy" after the measure is lifted.
Banning mobile phones from classrooms in colleges and universities
Jammer B. | 25.06.2024 0 0
In recent years, with the development of technology, it has become increasingly common for college students to use mobile phones and tablets in class. The Jiangxi Provincial Department of Education recently issued a regulation that prohibits students from using mobile phones and tablets in class unless necessary for teaching. This provision sparked widespread discussion.https://www.silencejammer.com
Many students and netizens expressed support for the ban, believing that mobile phones can easily cause distraction and affect learning results. Guo Jing, a sophomore majoring in law, pointed out that using mobile phones in class can distract attention, making it impossible to fully digest class knowledge. Moreover, some students even forget to take exams because of playing on their mobile phones, which affects their studies.
Some schools have taken steps to reduce students' use of mobile phones in class. For example, a university in Tianjin sets up mobile phone pockets in classrooms, and teachers or class leaders organize students to hand in their mobile phones before class. Although this measure was effective in the early stages, as time went by, students found various ways to circumvent it, and the effect gradually weakened.https://www.silencejammer.com/mobile-jammer-cell-phone-blocker
Not only in colleges and universities, the problem of addiction to mobile phones among primary and secondary school students is also becoming more and more serious. According to a report released in 2018, nearly 70% of Chinese primary and secondary school students own smartphones. Some local governments have issued regulations prohibiting primary and secondary school students from using mobile phones during school hours. For example, the Education Bureau of Zunyi City, Guizhou Province has stipulated that starting from June 2019, primary and secondary students will be completely prohibited from bringing smartphones and personal tablets into campus.
Lei Yanqin, a deputy to the National People's Congress, put forward a proposal calling for a complete ban on the use of smartphones by primary and secondary school students in schools. She believes that although smartphones are helpful for contacting family members and finding information, they also have many negative impacts, including affecting academic performance, physical fitness, and mental development.
In addition, Lei Yanqin suggested that the school formulate relevant regulations and implementation details to make it clear that it is illegal for students to bring mobile phones to campus, and the school has the right to require parents to cooperate and impose appropriate sanctions. At the same time, parents should actively cooperate with schools and avoid buying smartphones for their children.
Mobile phone management in modern schools
Jammer B. | 24.06.2024 0 0
1. Advantages
Smartphones provide students with convenient learning tools and resources. Through mobile phones, students can quickly find information, complete homework and participate in online learning. In addition, applications such as calendars and memos in mobile phones can help students better manage time and tasks and improve learning efficiency.https://www.silencejammer.com/
2. Disadvantages
Although mobile phones have many advantages, their disadvantages are also obvious. First, social media and games on mobile phones can easily distract students and affect classroom discipline and learning effects. Second, frequent use of mobile phones may have a negative impact on students' eyesight and mental health. In addition, mobile phones may also lead to social isolation among students and reduce opportunities for face-to-face communication.
The necessity of mobile phone management
In order to give full play to the advantages of mobile phones and mitigate their negative effects, modern schools need to formulate reasonable mobile phone management strategies. Proper mobile phone management not only helps improve learning outcomes, but also creates a more focused and healthy learning environment.
Mobile phone management strategies
1. Establish a clear mobile phone use policy
Schools should establish a clear mobile phone use policy to stipulate the time and scope of mobile phone use by students during school. For example, students can be required to turn their mobile phones to silent or off mode in class, and only use them during breaks or specific time periods. In addition, schools should explain the importance and necessity of these policies in detail to students and parents to gain their understanding and support.
2. Use mobile phone blockers
In order to prevent students from using mobile phones in class, schools can consider using mobile phone blockers. This device can block mobile phone signals in the classroom, making it impossible for students to use mobile phones during class, thereby avoiding distractions and interference. Of course, when using blockers, attention should be paid to emergency communication issues to ensure that students can contact their parents or teachers in an emergency.
3. Education and guidance
In addition to technical means, education and guidance are equally important. Schools should educate students on the importance of reasonable use of mobile phones and cultivate their self-discipline through lectures, courses, etc. Teachers should also guide students to focus on learning and reduce their dependence on mobile phones in class.https://www.silencejammer.com/p-adjustable-vhf-wifi-gps-jammer
4. Home-school cooperation
Mobile phone management is not only the responsibility of the school, but also the support and participation of parents. Schools should maintain close communication with parents, jointly formulate and implement mobile phone use regulations, and help students develop good mobile phone use habits. Parents can strengthen supervision of their children's mobile phone use at home to ensure that they can use mobile phones reasonably in their spare time.
U.S. GPS system power enhancement technology and its military applications
Jammer B. | 23.06.2024 0 0
On-board signal power adjustable technology
On-board signal power adjustable technology is a way to achieve power enhancement. This technology is implemented through the on-board control system and power management program. It does not require additional payload hardware and will not increase the burden on the satellite platform and power system. The GPS-2F satellite uses this technology to achieve a 7dB power increase in military navigation signals. Although the power increase is limited, this technology is less difficult to implement and is an effective means of power enhancement. https://www.silencejammer.com/gps-jammer-blocker-car-signalhttps://www.silencejammer.com/mobile-jammer-cell-phone-blocker
test verification projects show that power enhancement is still an important technical way for the U.S. Air Force to enhance the anti-jamming capability of the GPS system. Through the verification and application of these technologies, the anti-interference ability of the US GPS system will be further improved.
Military application prospects
The application of power enhancement technology in the military is of great significance. By improving the anti-interference capabilities of navigation signals, the United States can ensure the stability and reliability of navigation services in complex electromagnetic environments. In the future, with the development of spot beam technology and on-orbit reprogrammability and signal reconstruction technology, the application prospects of U.S. GPS systems on the battlefield will be even broader. The application of these technologies not only enhances the navigation capabilities of the US military, but also enhances its information advantage on the battlefield.
in conclusion
Power enhancement technology is an important means to improve the anti-interference ability of satellite navigation systems. The United States has significantly improved the navigation service capabilities of the GPS system through on-board signal power adjustable technology and spot beam technology. Driven by the Navigation Technology Test Satellite-3 project, these technologies will be further developed and applied in the future to provide more reliable navigation services for the US military on the battlefield. The widespread application of power enhancement technology will ensure the United States' leading position in the field of military navigation.
GPS positioning system technology trends in future military warfare
Jammer B. | 22.06.2024 0 0
With the continuous advancement of military technology, the role of GPS positioning systems in future wars will be even more significant. This article will explore the development trends and application prospects of GPS technology in future military warfare. https://www.silencejammer.com...-cell-phone-blocker
Preliminary application of GPS in war
The GPS positioning system was first used on a large scale in the 1991 Gulf War, showing its great potential in modern warfare. By using GPS receivers carried in jacket pockets, Allied forces were able to operate effectively in mapless deserts. These receivers provide precise position information and solve navigation problems in complex terrain.
In addition, GPS technology is also used in the inertial navigation/GPS module integrated system, allowing the hit accuracy of missiles and guided bombs to reach 9 meters. These systems allow airborne bombs to carry out precise strikes at night and in adverse weather conditions, significantly improving the Allied Forces' combat capabilities.
GPS technology breakthrough in the new century
With the development of technology, GPS positioning systems have shown greater potential in military applications. The following are several important trends in the future development of GPS technology:
Innovative track design
Europe has made significant progress in navigation and positioning satellite research. The first-generation systems include the Global Navigation Satellite System (GNSS) and the European Geostationary Navigation Overlay Service System (EGNOS), which combine the advantages of GPS positioning and geostationary communications satellites. The "Galileo" solution in the second-generation system adopts an innovative orbit design. It is an independent system, is open, and is compatible with GPS. This system also has broad application prospects in civil aviation, safe approach and landing of aircraft and other fields.
Development of anti-jamming and jamming technologies
In order to prevent enemy interference, the United States will use a new signal structure on the seventh GPS-2F satellite launched in 2005 to improve signal confidentiality and anti-interference capabilities. The United States is developing a GPS receiver application module (GRAM) that is immune to interference and spoofing and a selectively exploitable anti-spoofing module (SAASM). Receivers equipped with these two GPS modules are called "Department of Defense Advanced GPS Receivers" ( DARG). In addition, the United States is also developing microstrip adaptive antenna arrays to protect military aircraft from using GPS, and has developed small GPS jammers to prevent enemies from receiving GPS signals.
Technical Measures to Improve Navigation Signal Performance
Currently used analog cesium clocks suffer from difficulties in performance prediction and environmental impact. To improve this, computer-controlled digital cesium clocks are being developed to optimize their performance by adjusting internal parameters and compensating for environmental effects.
In short, the role of the GPS positioning system in future military wars will be more significant. Through continuous innovation and technological breakthroughs, the GPS system will provide stronger support for military operations and ensure that technological advantages are maintained in future wars.
Russian GPS signal interference may cause civil aviation crashes
Jammer B. | 20.06.2024 0 0
If someone turns off your headlights when you drive at night, it's dangerous. Two Finnair flights from Helsinki to the Estonian city of Tartu were forced to turn around and return to Finland due to GPS interference
https://www.silencejammer.com...-cell-phone-blocker
On Thursday and Friday, two Finnair flights from Helsinki to the Estonian city of Tartu were forced to turn around and return to Finland due to GPS interference because they could not safely fly to their original destinations.
Lithuanian Foreign Minister Gabrielius Landsbergis told the Financial Times: "If someone turns off your headlights when you drive at night, it's dangerous. The situation in the Baltic region close to the Russian border has now become too dangerous to ignore."
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Estonian Foreign Minister Margus Tsahkna added: "We believe that what is happening with GPS is part of Russia's hostile activities, and we will definitely discuss this with our allies." Tsahkna stressed: "This behavior is a hybrid attack that poses a threat to our people and security, and we will not tolerate it."
Tens of thousands of civilian flights have been affected by GPS jamming in recent months, according to experts. The jamming affects all GPS users in the region, and it has also blocked signals used by ships in the Baltic Sea, leading the Swedish navy to issue a warning about shipping safety.
GPS jamming is easy to carry out using relatively cheap equipment, according to experts. No country has admitted to being behind the jamming of signals in the Baltics, but officials in the region say there is no doubt that Russia is behind the jamming both on its home turf and in its Kaliningrad enclave between Poland and Lithuania on the Baltic Sea.
One theory is that Russia is trying to protect Kaliningrad from potential attacks by Ukrainian drones, a senior official said. The Kremlin did not respond to a request for comment. London confirmed in March that a government plane carrying British Defense Secretary Grant Shapps had its GPS jammed near Kaliningrad on its way home from Poland.
GPS expert Dana Goward said: "The chances of an incident are rising." Goldwater, who is president of the GPS user advocacy group Resilient Navigation and Timing Foundation, added that while there are backup systems, crews receive less training on them than on GPS and that "without GPS, aviation will be less efficient and less safe".
However, Juho Sinkkonen, head of flight operations at Finnair and a 22-year pilot, said GPS interference has been increasing since 2022 and is "just a disruption and does not have an imminent impact on safety".
Sinkkonen added that most airports have equipment that allows aircraft to land without GPS, but Tartu "is one of the few airports where a GPS signal is required to prepare the landing procedure".
"We take these incidents seriously. Our relevant agencies are in contact with colleagues in other countries", said Latvian Foreign Minister Baiba Braže. Experts say there are several different sources of GPS interference, one of which appears to be located in Kaliningrad, another responsible for interference in Estonia and Finland, and a separate source affecting Norway and the northernmost part of Finland.
Baltic officials are discussing GPS jamming with allies and urging Russia to stop endangering civilian aircraft. "Allies should not remain indifferent to Russia's jamming of GPS signals and thus endangering international air traffic," said Marko Mihkelson, chairman of the Estonian parliament's foreign affairs committee.
Is it more comfortable to play games in the car than on the phone?
Jammer B. | 19.06.2024 0 0
As a "homebody" who likes to play games, I have bought many 3A-level works. Some of these games are played frequently, and some are played for one or two hours after they are bought. In short, I think I have a lot of experience in games. In most people's inherent impression, general games are played on computers, mobile phones or consoles, but the current domestic new energy vehicles have very rich functions. Some of them can already play games in the car, and I came into contact with this by chance.
https://www.silencejammer.com...-cell-phone-blocker
I remember that day's calendar, the unit showed a very busy side, and my colleague and I were assigned to Taiyuan on a business trip, but the vehicles in the unit were all dispatched, so in the end my colleague and I drove the Han EV Genesis Edition (715km Honor Edition) to Taiyuan. And along the way, my colleague let me see the charm of pure electric models. First of all, the Han EV Genesis version has a very fast start and acceleration. Compared with cars, it is always one step faster, and the quietness in the car is also very good. Even when the speed is 120 kilometers per hour, there is only a little wind noise in the car, and the overall experience is quite good. At the same time, the air conditioning of the Han EV Genesis version is quite sharp. It is about minus 10 degrees here, but the air conditioning of the Han EV Genesis version can still heat up very quickly. You almost don’t need to wear a coat in the car. It feels very comfortable.
Of course, this car also has several obvious shortcomings. The first one is that its seat is not very supportive of the body. When encountering turning conditions on the highway, perhaps because I am wearing a seat belt, although it will not make my body tilt, but the body will still have a greater sense of shaking. Fortunately, its chassis has good shock filtering ability, so that I, who am a little carsick, will not feel too embarrassed.
When we got off the highway and came to the city, this car was much better in the city than on the highway. Even in a traffic jam, the braking and starting of the vehicle would not give people a turbulent feeling. Of course, this may be inseparable from my colleague's superb driving skills. However, when we got the documents, my colleague wanted to go to his girlfriend with the attitude of "since we were here, I naturally couldn't follow him", so I took a rest in the back seat of the car. The rear space of this Han EV Genesis Edition is not like a medium or large sedan at all. I am 1.8 meters tall and can hardly lie down horizontally. Even if I sit upright, I will feel my head hitting my head, which is in sharp contrast to the front seat space.
It is precisely because of this that I discovered a big highlight of my colleague's Han EV Genesis Edition, that is, its car computer can actually play games. After opening the application management and entertainment, you can find that there are many types of games here. The specific operations are not much different from those on the mobile phone, but downloading requires traffic, and this car is not my car after all, so I did not download some games I like to play. Among the downloaded games, as expected, my colleagues and I have been playing League of Legends (of course, it is a mobile game). So I opened this game with a skeptical mood, and in order to avoid network problems that lead to pit teammates, I chose to customize, and the effect was surprisingly good. There was no lag or disconnection during the whole process, and even the release of skills was quite smooth.
U.S. middle schools ban students from using mobile phones for one year. These ar
Jammer B. | 18.06.2024 0 0
Maple Grove Middle School in Minnesota, USA, implemented a "cell phone ban" last year, prohibiting students from using mobile phones during the school day from 8:10 a.m. to 2:40 p.m. One year after the policy was implemented, there were significant positive changes within the school. Principal Patrick Smith said this measure not only makes students more focused on learning, but also promotes interaction among peers and reduces bullying on campus.
Before the cell phone ban was implemented, students at Maple Grove Middle School were mostly addicted to their mobile screens, and interactions between classmates were rare in the hallways. Smith recalled that students not only stopped communicating between classes, but also lacked interaction when face to face. This phenomenon seriously affected students' social skills and campus atmosphere. In addition, the proliferation of social media information brought by mobile phones has also become a trigger for student conflicts. Smith pointed out that the widespread use of mobile phones among teenagers not only distracts their attention, but also leads to many unnecessary conflicts and frictions. https://www.silencejammer.com...-cell-phone-blocker
After the cell phone ban was implemented, the campus atmosphere at Maple Grove Middle School changed significantly. Students participated more actively in discussions in class and began to actively communicate with classmates during breaks. Principal Smith said that students' participation in class has increased significantly, and interactions between classmates are more frequent and sincere. The hallways are once again filled with laughter and conversation, and instead of just looking down at their phones, students are beginning to value face-to-face communication. This change not only improves the campus atmosphere, but also enhances friendship and trust among students.
Mobile phone bans have also played an important role in reducing bullying in schools. Smith noted that bullying in schools dropped significantly after the ban was implemented. Students no longer have misunderstandings and conflicts due to information on social media, which provides them with a more harmonious learning environment. Parents also appreciate the change. Kim Gillen, a parent of a student, spoke of the positive changes in her children after the ban was implemented. She mentioned that the children were more attentive and active in class, and the teachers also spoke highly of it. Gillan said that as a parent, she feels very gratified and satisfied to see her children flourish in such an environment.
Although there is no concrete data to prove that students' academic performance has significantly improved due to the mobile phone ban, feedback from parents and teachers shows that children's overall performance has improved significantly. Parents generally believe that the mobile phone ban has had a positive impact on children's study habits and social skills. Principal Smith also firmly believes that this policy will have a profound impact on students in the coming years.
The successful experience of Maple Grove Middle School has aroused widespread attention and discussion in the education community. Many schools and education experts believe that mobile phone bans are an effective management tool that can improve students' learning environment, increase classroom participation, and reduce the negative impacts of mobile phone use. Supporters believe that reducing the use of mobile phones can reduce students' risk of Internet addiction, protect their physical and mental health, and cultivate better learning and living habits.
However, there are also some opposing voices who believe that completely banning mobile phones may not be the best way to solve the problem. In modern society, mobile phones have become an indispensable tool in people's daily lives. A complete ban on their use may trigger resistance among students and affect the cultivation of their digital literacy. Some education experts suggest that schools can help students learn to use mobile phones at appropriate times and occasions by formulating reasonable usage regulations and educational guidance, thereby achieving the dual goals of ensuring learning effects and improving digital skills.
Despite the controversy, Maple Grove Middle School's practice undoubtedly provides a valuable reference case for other schools. How to effectively manage the use of mobile phones in the education process is still a topic that requires continuous exploration and practice. For education policymakers, the key is to find a balance so that students can enjoy the convenience brought by technology while maintaining good study habits and healthy lifestyles. As more schools try and implement similar mobile phone ban policies, they may be able to accumulate more data and experience, further optimize education management strategies, and create an environment more conducive to learning and growth for students.
Chinese prisoners were beaten in Phnom Penh Bai Soe Prison in Cambodia, and the
Jammer B. | 17.06.2024 0 0
Recently, a video of a Chinese prisoner being beaten in Phnom Penh Bai Soe Prison in Cambodia was widely circulated on social media, which aroused great public concern and the intervention of the General Department of Prisons of the Ministry of Interior. The incident further revealed the management loopholes and safety hazards in the prison, and prompted relevant departments to take measures to strengthen prison management, especially strict control of mobile phone use.
According to a statement from the General Department of Prisons, the incident occurred between 9 and 10 am on April 5 in Cell No. 9 of Building C of Phnom Penh Bai Soe Prison. The victim was a 52-year-old Chinese prisoner named Li, who was sentenced to 12 years in prison for drug trafficking. The two Cambodian prisoners involved, one 35 years old, was sentenced to two years in prison for drug trafficking; the other 36 years old, was sentenced to 17 years in prison for drug trafficking and murder.
According to the investigation results of the General Department of Prisons, the cause of the incident was that a Cambodian man who was sentenced to prison for murder felt insulted and slapped Li on the head several times in anger, and then another Cambodian man also participated in beating Li. One day after the incident, the two Cambodian men involved apologized to Li. Despite this, Li still asked to be transferred to another cell to avoid being attacked again. https://www.silencejammer.com...-cell-phone-blocker
The prison punished the two Cambodian men involved, including prohibiting their families from visiting or sending items within 20 days. In addition, the General Administration of Prisons also emphasized the prohibition of using mobile phones in prisons, believing that the video shooting and circulation of the fight was deliberately planned by someone to attack relevant departments. To this end, the prison said it would further strictly control the use of mobile phones in prisons to prevent similar incidents from happening again.
This incident exposed some problems in prison management. First, the violent conflict between prisoners showed the prison's shortcomings in security. Although the prison claimed that no one was injured in the incident, the victim Li and his family still expressed concerns about his personal safety in prison. The prison said in a statement that it had asked Li, and Li said that he was not threatened with further persecution. However, this cannot completely eliminate the outside world's doubts about the security management in the prison.
What is the "three-step" development route of the Beidou satellite navigation sy
Jammer B. | 19.04.2024 0 0
In accordance with the general requirements of "quality, safety, application, and efficiency", adhere to the development principles of "independence, openness, compatibility, and gradualness", follow the overall idea of "regional first, then global", and follow the "three-step" development route, The development idea of "first regional, active, then global, passive" will be implemented step by step to form a Beidou system generation model and development path that highlights regional assurance, is oriented to global services, and is rich in Chinese characteristics. The specific development steps of the Beidou satellite navigation system are as follows:
https://www.silencejammer.com
The first step is the Beidou satellite navigation test system:
In 1994, China started the construction of the Beidou satellite navigation test system; in 2000, it launched two Beidou navigation test satellites, completing the Beidou satellite navigation test system and becoming the third country in the world to have an independent satellite navigation system; in 2003, it launched the third Beidou satellite The navigation test satellite further enhances the performance of the Beidou satellite navigation test system.
The Dou satellite navigation test system consists of three parts: the space constellation section, the ground operation and control section and the user terminal section. The space constellation segment includes three GEO satellites respectively fixed over the equator at 80 degrees, 110.5 degrees and 140 degrees east longitude. The ground control part consists of a ground control center and several calibration stations. The ground control center mainly completes tasks such as satellite orbit determination, ionospheric correction, user position determination and user short message information exchange. The calibration station mainly provides distance for the ground control center. Observations and correction parameters. The user terminal part consists of various British-type terminals such as handheld, vehicle-mounted and command-type terminals. The main functions and performance indicators of the Beidou satellite navigation test system such as transmitting positioning applications and receiving position coordinate information are as follows:
●Service function positioning, one-way and two-way timing, short message communication;
●Service area: China and surrounding areas;
●Positioning accuracy is better than 20 meters;
●Timing accuracy is 100 nanoseconds in one direction and 20 nanoseconds in two directions;
●Short message communication: 120 Chinese characters/time.
The second step is Beidou satellite navigation system regional service:
In 2004, China started the Beidou satellite navigation system project construction. By the end of 2012, it completed the networking of 5 GE satellites, 5 GSO satellites and 4 MEO satellites to provide regional service capabilities. The main functions and performance indicators of the Beidou Satellite Navigation System’s district-to-city services are as follows:
●Service functions: positioning, speed measurement, one-way and two-way timing, short message communication;
●Service area China and surrounding areas;
●Positioning accuracy: 10 meters in plane and 10 meters in elevation;
●Speed measurement accuracy: better than 0.2 meters/second;
●Timing accuracy: 50 nanoseconds in one direction and 20 nanoseconds in two directions;
●Short message communication: 120 Chinese characters/time.
The third step is Beidou satellite navigation system global service:
Beidou-3 began to enter the intensive launch of satellites in 2017. During the global networking period, at 02:09 on June 25, 2019, my country successfully launched the 46th satellite with the Long March-3B carrier rocket at the Xichang Satellite Launch Center. Beidou navigation satellite.
What is the "three-step" development route of the Beidou satellite navigation sy
Jammer B. | 19.04.2024 0 0
In accordance with the general requirements of "quality, safety, application, and efficiency", adhere to the development principles of "independence, openness, compatibility, and gradualness", follow the overall idea of "regional first, then global", and follow the "three-step" development route, The development idea of "first regional, active, then global, passive" will be implemented step by step to form a Beidou system generation model and development path that highlights regional assurance, is oriented to global services, and is rich in Chinese characteristics. The specific development steps of the Beidou satellite navigation system are as follows:
https://www.silencejammer.com
The first step is the Beidou satellite navigation test system:
In 1994, China started the construction of the Beidou satellite navigation test system; in 2000, it launched two Beidou navigation test satellites, completing the Beidou satellite navigation test system and becoming the third country in the world to have an independent satellite navigation system; in 2003, it launched the third Beidou satellite The navigation test satellite further enhances the performance of the Beidou satellite navigation test system.
The Dou satellite navigation test system consists of three parts: the space constellation section, the ground operation and control section and the user terminal section. The space constellation segment includes three GEO satellites respectively fixed over the equator at 80 degrees, 110.5 degrees and 140 degrees east longitude. The ground control part consists of a ground control center and several calibration stations. The ground control center mainly completes tasks such as satellite orbit determination, ionospheric correction, user position determination and user short message information exchange. The calibration station mainly provides distance for the ground control center. Observations and correction parameters. The user terminal part consists of various British-type terminals such as handheld, vehicle-mounted and command-type terminals. The main functions and performance indicators of the Beidou satellite navigation test system such as transmitting positioning applications and receiving position coordinate information are as follows:
●Service function positioning, one-way and two-way timing, short message communication;
●Service area: China and surrounding areas;
●Positioning accuracy is better than 20 meters;
●Timing accuracy is 100 nanoseconds in one direction and 20 nanoseconds in two directions;
●Short message communication: 120 Chinese characters/time.
The second step is Beidou satellite navigation system regional service:
In 2004, China started the Beidou satellite navigation system project construction. By the end of 2012, it completed the networking of 5 GE satellites, 5 GSO satellites and 4 MEO satellites to provide regional service capabilities. The main functions and performance indicators of the Beidou Satellite Navigation System’s district-to-city services are as follows:
●Service functions: positioning, speed measurement, one-way and two-way timing, short message communication;
●Service area China and surrounding areas;
●Positioning accuracy: 10 meters in plane and 10 meters in elevation;
●Speed measurement accuracy: better than 0.2 meters/second;
●Timing accuracy: 50 nanoseconds in one direction and 20 nanoseconds in two directions;
●Short message communication: 120 Chinese characters/time.
The third step is Beidou satellite navigation system global service:
Beidou-3 began to enter the intensive launch of satellites in 2017. During the global networking period, at 02:09 on June 25, 2019, my country successfully launched the 46th satellite with the Long March-3B carrier rocket at the Xichang Satellite Launch Center. Beidou navigation satellite.
Can drone countermeasures intercept and destroy enemy drones?
Jammer B. | 18.04.2024 0 0
(1) It is necessary to understand the types and working principles of UAV countermeasures equipment. UAV countermeasures equipment usually include electronic jamming equipment, laser and microwave weapons, etc. Among them, electronic jamming equipment can interfere with the communication system, navigation system or control system of the drone by emitting electromagnetic waves or other energy beams, causing it to lose control or be unable to complete its mission. Laser and microwave weapons can directly destroy enemy drones by emitting laser or microwave energy to destroy them.
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(2) Whether the UAV countermeasures equipment can intercept and destroy enemy UAVs depends on many factors, such as the performance of the equipment, the performance of the enemy UAVs and the skills of the operators. Some drone countermeasures equipment may not be able to completely intercept or destroy certain types of enemy drones, especially those with advanced protection technology. In addition, operators need to make judgments and decisions in a short time, which requires a high degree of professionalism and skills.
(3) Although UAV countermeasures equipment has a certain ability to intercept and destroy enemy UAVs, it is not omnipotent. In practical applications, it is necessary to comprehensively consider multiple factors and adopt a combination of multiple methods to improve the success rate of intercepting and destroying enemy drones.
(4) UAV countermeasures equipment has a certain ability to intercept and destroy enemy UAVs. However, in practical applications, it is necessary to comprehensively consider multiple factors and adopt a combination of multiple methods to improve the success rate. At the same time, it is necessary to continuously improve and perfect the technology and performance of UAV countermeasures equipment to deal with the ever-changing enemy UAV threats.
How to choose a suitable mobile phone signal jammer?
Jammer B. | 17.04.2024 0 0
1. Frequency range: Different jammers are suitable for different frequency bands. Choose a jammer that covers the target communication frequency;
https://www.silencejammer.com/
2. Power adjustment: Select the appropriate power adjustment function according to the usage scenario to avoid interference with surrounding communication equipment;
3. Range control: Determine the shielding range as needed to avoid affecting normal external communication;
4. Quality brand: Choose a well-known brand and reputable mobile phone signal jammer supplier to ensure product quality and after-sales service.
Precautions for using mobile phone signal jammer
1. Legal compliance: Before using a mobile phone signal jammer, understand the relevant local laws and regulations to ensure legal compliance;
2. Avoid misoperation: avoid accidentally turning on the jammer, causing communication interruption, and ensure correct use;
3. Regular maintenance: Regularly check and maintain the mobile phone signal jammer to ensure its normal working condition.
Mobile phone signal jammers play an important role in specific situations. Choosing a suitable jammer can effectively protect communication security. By understanding its functions, types and selection methods, you can better apply mobile phone signal jammers and improve communication security and confidentiality.
Why is it controversial to install mobile phone signal jammers in school dormito
Jammer B. | 16.04.2024 0 0
Students believe that freedom of communication is restricted, the school explains in detail four considerations, and dormitories have fixed phones
"The school has installed mobile phone signal jammers on each floor of the dormitory. There is no mobile phone signal in the dormitory, and it is impossible to contact the outside world in time." An anonymous netizen sent the above message to the Zaobao reporter online, complaining about the restrictions of a middle school in Jinjiang They have freedom of communication and mobile phones have become a decoration. The reporter went to verify the report yesterday.
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It is very inconvenient to not be able to use mobile phones in the student dormitory
At around 11 o'clock yesterday morning, reporters came to the entrance of the middle school for interviews. A senior high school girl confirmed the netizen’s complaint. She said: "The dormitory building has been equipped with jammers. As soon as I return to the dormitory after class, there is no signal on the mobile phone." The cousin who came to pick her up said: "Her mobile phone often has no signal and she cannot contact anyone in time. If it’s really urgent, you have to tell the security guard and then communicate it through the security guard.”
Xiao Su, a second-year junior high school student, also said that the high school dormitory building is indeed equipped with jammers, but the junior high school has not. However, she heard that the junior high school will also install jammers next.
Several first-year high school boys further revealed that the school installed mobile phone signal jammers in the second semester of last year, and the jammers were installed in their dormitories. “When I have dinner at noon or return to the dormitory after class in the afternoon, there is basically no signal. You have to use the dormitory phone for phone calls." When the reporter asked them if they had mobile phones, a boy shouted: "If there is no signal, it is useless to have a mobile phone!"
The reporter followed several boys to the high school boys' dormitory. In the dormitory on the second floor, a boy led the reporter to find the jammer in the corridor. The reporter then tried dialing a few calls on his mobile phone in the corridor, and the call went through. "The jammer is sometimes on, sometimes off. Maybe it's not on now," the boys said.
One boy said: "The jammer makes people feel like they have a headache. Three or four students have this feeling."
The school has carefully considered and solicited opinions in advance
The relevant person in charge of the middle school told reporters that the school installed mobile phone signal jammers after careful consideration. There were four main considerations.
The first consideration is that some students will send messages to each other through mobile phones during exams, and even search for essays online to plagiarize. It is hoped that installing a blocker will prevent candidates from using mobile phones to cheat.
The second is that many students will lie in bed and surf the Internet after class or evening self-study. However, there is a lot of bad information on the Internet, which is very detrimental to students' growth and learning.
The third reason is that some students send text messages and make love calls after studying in the evening and before going to bed, which affects their study the next day. They are already high school students and are in a critical period.
Fourth, during the period after lights out for evening self-study, students are doing various activities on their mobile phones while lying in bed, and student administrators have no control over the students.
The person in charge said that in view of the above factors, the school chose to turn on the jammer to block mobile phone signals during the two periods of time after the lights are turned off at noon and evening self-study, "outside the monitoring line of sight", and the jammer was turned off at other times. He said that the school also considered that it could not affect the contact between students and parents, so it reduced the coverage of the jammer to only the dormitory buildings. "It will not affect the communication between home and school. The dormitories have fixed phones and IC card phones, etc. It will not affect the communication between students and teachers."
Before installing the jammer, the school did some research. The person in charge said, "The school sent a letter to parents, and many parents supported this approach." In addition, the school also held a mobilization meeting for students. Most students were in favor, but only a small number of students had opinions.
As for some students, they think jammers can cause headaches. The person in charge said that there is currently no scientific evidence that jammers can cause headaches, and the school will ask experts to investigate. If experts determine that there is an impact, the school should make adjustments, "everything must be based on the interests of students."
Parents understand that the school’s approach of not shielding is indulging.
The reporter randomly interviewed several parents, and most of them expressed understanding of the school's approach.
Parents of students who support the school’s approach believe that most mobile phones have game and Internet functions. If students are addicted to games and Internet access, it will affect their rest and prevent them from concentrating on their studies. There are all kinds of information on the Internet now, including some bad information. Frequent viewing of this information has a very bad impact on children. It is necessary for schools to block mobile phone information to protect students.
They believe that the main task of children is to study. If they need to contact home or friends, the telephones in the dormitory and campus are enough for them to use. They believe that excessive use of mobile phones is a waste of time, and mobile phones also provide convenience for early love. The school does not block mobile phone messages but makes them more indulgent.
Some parents also expressed different opinions. "Nowadays, high school students are 17 or 18 years old and have become independent. Will installing mobile phone jammers affect their freedom of communication?" Ms. Zhang, a parent of the student, believes, "Students learn on their own initiative, and the school's approach may be unilateral. ‘Wishful thinking’, restricting students’ use of mobile phones may not necessarily allow them to study with peace of mind.”
Education Department:
Protect students’ physical and mental health
More reasonable than “confiscating” mobile phones
Regarding this matter, Zhuang Yingduan, director of the Jinjiang Municipal Education Bureau, said that using mobile phones during breaks is not conducive to students' rest, and some bad information on mobile phones also has an adverse impact on their physical and mental health. The school blocks mobile phone information during specific periods to protect students' physical and mental health.
He said that mobile phones are not the only tool for students to communicate with the outside world. The school has installed fixed phones in student dormitories, and there are also magnetic card phones on campus. These phones ensure students' external contact. Blocking information on mobile phones during specific periods is generally conducive to children's rest and study, and most parents and teachers support this. It is understandable that students have different opinions. The school can publicize more to students and explain more to parents. When they know that this is conducive to protecting the healthy growth of students, they will provide understanding and support. Schools in other regions also have similar management measures, such as "confiscating" mobile phones, storing mobile phones, etc. Compared with these measures, blocking mobile phone information is more practical.
Lawyer’s statement:
No absolute freedom of communication
It is normal management behavior
Lawyer Zhang Chuanjiang, a member of the Zaobao Legal Advisory Group, believes that judging from the school's specific practices, the school's behavior of blocking mobile phones is a normal management behavior and does not violate relevant regulations. The school has installed fixed phones in each dormitory, and there are also magnetic card phones on campus. These tools can provide students with channels for external communication, without affecting students’ communication rights, nor the contact between parents and students.
No freedom is absolute, and there is no absolute freedom of communication. In fact, not allowing students to use mobile phones or bringing mobile phones into campus is a management method adopted by many schools, and it does not violate relevant education regulations. Properly regulate students' use of mobile phones, which is conducive to their learning and growth.
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