With the rapid advancement of 5G communication, artificial intelligence, and other technologies, civil unmanned aircraft (UA) have developed swiftly and are now applied in numerous fields such as consumer entertainment, formation performances, power line inspection, disaster relief, agricultural protection, forest fire prevention, and geographic mapping. Currently, China designs and produces over 80% of the global market share of civil drones. Consumer-grade drones, represented by DJI Innovation Technology, have shipped more than a million units. According to the definition of the Flight Standards Department of the Civil Aviation Administration of China (CAAC), a UA is an aircraft managed by a control station (including remote operation or autonomous flight). Common civil drones in the market include fixed-wing and rotary-wing types. Professional drones used for forest fire prevention, geographic mapping, and agricultural protection are generally larger, while consumer drones are more common. Consumer drones are portable, easy to launch, and offer unique perspectives from above, appearing in more and more application scenarios. However, illegal “black flights” of civil drones have led to incidents such as crashes injuring people, privacy violations, and disruption of aviation order. Among these, disruption of aviation order is the most severe, posing the most direct and serious potential harm and public security threats, and it is the key issue that current civil drone regulation urgently needs to address.
This article aims to discuss from the perspective of civil aviation management how to utilize the mature aircraft management experience of civil aviation authorities to promote the effective implementation of drone regulation measures in China. In particular, it provides recommendations on advancing drone management legislation, managing low-altitude airspace order around civil airports, emergency response to illegal drone intrusions at civil airports, emergency support for major events, and the use and management of drone detection and countermeasure systems at civil airports. It focuses on the discussion of drone regulation from the perspective of civil airports.
Potential Threats of Civil Drones to Low-Altitude Safety at Civil Airports
Threat of Foreign Object Intrusion via Airport Perimeter
Drones are portable, easy to launch, and capable of carrying payloads. They can cross airport perimeters to intrude into the airport or drop items inside. Currently, only mainstream manufacturers equip drones with no-fly zone functions, which can be bypassed by flashing firmware or masking GPS antennas. Moreover, self-assembled (DIY) drones, racing drones, and model aircraft often lack no-fly or flight restriction functions due to incomplete ground station control software. According to incomplete statistics, during the construction of a certain airport, fixed-wing drones were picked up inside the perimeter more than three times. On December 19–20, 2018, two drones continuously intruded into Gatwick Airport in the UK, causing 58 flights to be diverted or canceled and the airport to close for 33 hours.
On September 5, 2021, at around 17:00, a person named Cheng flew a drone on the rooftop of a residential building near Chengdu Shuangliu Airport. The drone lost control and drifted toward Chengdu Shuangliu International Airport with the wind, seriously threatening airport safety.
There are numerous manufacturers of civil drones with varying product quality. Typical safety issues include remote control interference leading to loss of control, propeller fracture, falling accessories, lack of obstacle avoidance, navigation signal failure, battery spontaneous combustion, and potential hacking attacks. Once a drone loses control and falls onto the runway, it becomes a foreign object intrusion (FOD) that could threaten flight takeoff and landing. Additionally, drones may crash due to battery depletion or operator error, damaging expensive airport infrastructure and causing severe property losses.
Proximity of Drones to Civil Airliners Threatens Operational Safety
Drones approaching civil airliners seriously threaten aviation safety. According to public reports, between 2010 and 2016, there were nearly 1,000 incidents of drones colliding with or approaching aircraft in Europe. As of August 2016, the U.S. Federal Aviation Administration reported over 600 dangerous proximity events of drones approaching aircraft.
In 2017, the Shanghai Aircraft Airworthiness Certification Center of CAAC and other organizations conducted a collision experiment using a domestic civil aircraft nose structure and a DJI drone. The experiment set the airliner at an altitude of 500 meters (the typical altitude limit of consumer drones) during takeoff or landing speed. The results showed that the front windshield of the airliner’s nose was damaged. According to test data, a civil drone weighing less than 500 grams colliding with an aircraft flying at approximately 1,000 km/h generates a force exceeding 200,000 Newtons, equivalent to a small-caliber artillery shell, which could penetrate the aircraft fuselage and cause a catastrophic crash.
Since 2017, multiple domestic airports including Chengdu Shuangliu, Sunan Shuofang, Hangzhou Xiaoshan, and Kunming Changshui have experienced illegal drone flights in the clearance zone, approaching landing or departing flights and causing multiple flight delays. In September 2018, Wenzhou Airport reported that a rotary-wing drone approached a landing flight within 30 meters, causing subsequent flights to hold and severely affecting airport safety operations.
Currently, Chinese civil airports designate a rectangular clearance protection area extending 20 km from each runway end and 10 km laterally. However, this area includes farmland, schools, parks, and other locations prone to drone “black flights,” making it difficult to ensure safety. Drone manufacturers typically set no-fly zones and restricted zones based on minimum ranges, which often fail to cover the clearance protection area required for aircraft takeoff and landing.
Risk of Privacy Leakage within Airport Operations
Drones equipped with cameras and photography capabilities can be used by enthusiasts or criminals to unlawfully film airport operations for curiosity, bragging, or specific purposes. Uploading such images or videos to online platforms may cause privacy breaches. I searched on Baidu, Douyin, and other platforms with the keyword “drone aerial photography airport” and found multiple aerial images and videos of civil airports. Some recordings captured parts of airport construction, while others focused on terminal buildings. In January 2017, someone used a drone to film aircraft takeoff and landing up close at Xiaoshan Airport. In June 2020, a media company in Changsha flew a drone in the clearance zone of a military airport to shoot a promotional video, which was subsequently handled.
Currently, driven by economic interests or traffic, many drone enthusiasts still take risks to illegally film near airports.
Current Status and Challenges of Drone Regulation in Civil Aviation
National Policies on Drone Regulation
China’s “Basic Rules of Flight of the People’s Republic of China” promulgated in 2000 did not include drones due to the technological level at that time. Even in the 2007 revision, drones were not covered. Currently, drone flight plans need to be reported to the military aviation department, but the military has not provided an interface for ordinary citizens to apply for airspace. Therefore, most drone flights are essentially “black flights.”
Since 2015, CAAC has issued a series of regulations such as the “Regulations on Real-Name Registration of Civil Unmanned Aircraft,” “Interim Measures for Air Traffic Management of Civil Unmanned Aircraft Systems,” and “Regulations on the Management of Civil Unmanned Aircraft Pilots.” These aim to promote drone real-name registration, require pilots to have licenses, and provide training and certification services through the Aircraft Owners and Pilots Association (AOPA). However, due to high certification costs and the lack of enforcement authority of civil aviation departments, the mandatory effect of real-name registration is unsatisfactory. Many drone enthusiasts use borrowed identities or falsified information to circumvent the system, preventing effective implementation. Moreover, for drones assembled from open-source modules with incomplete application software, real-name registration is unrealistic. The current “Interim Regulations on the Management of Unmanned Aircraft Flights (Draft for Comments)” stipulates that drones with an empty weight less than 250 grams cannot fly above 50 meters. However, this standard is easily met by ordinary toy drones. Some small drones, despite their light weight, still have a remote control radius of more than 2 km.
Due to the lack of regulations and penalties for the production and sale of drones and key components (such as remote control and video transmission modules), there is a lack of source control over drone regulation.
Current Status and Advantages of Civil Aviation in Drone Regulation
Civil aviation authorities are actively participating in national and local drone regulation efforts, including the development of drone identification code technical standards and real-name authentication systems.
In addition to the aforementioned regulations, major domestic airports such as Beijing Capital, Beijing Daxing, Shuangliu, Baiyun, and Tianhe have leased or purchased integrated drone defense systems.
During major national conferences and events, civil aviation departments have also issued and implemented drone defense measures.
The Civil Aviation Management Institute of China has led the formulation of the “General Technical Requirements for Detection and Countermeasure Systems of Unmanned Aircraft at Civil Airports” and conducted research on drone management and the delineation of local drone flight zones.
At a certain airport’s bird-strike prevention module, domestic civil aviation research institutions, together with radar and optoelectronic identification equipment manufacturers, have carried out research on the detection, identification, and disposal of drones and birds in the movement area.
Overall, the civil aviation industry is at the forefront among civilian sectors in terms of both demand and technological development for drone regulation, playing a pivotal role in domestic drone control efforts.
Difficulties and Deficiencies in Civil Aviation’s Drone Regulation
Civil airports are important national infrastructure and typical scenarios for urban drone regulation, as well as technical testing grounds.
Geographically, civil airports are often located on the outskirts of cities, with clearance zones encompassing complex terrain and social environments. Aircraft takeoff and landing routes are relatively fixed and follow strict aircraft management procedures.
Technologically, the airport clearance protection area is vast. To achieve a detection range of 5 km from the runway end, multiple sets of equipment are required using current effective detection methods such as radar, optical tracking, radio frequency detection, and acoustic detection. Near airports, there are interfering targets such as birds, trees, radar stations, and control towers, as well as complex electromagnetic environments, reducing detection range and increasing the workload of filtering false alarms. For example, with phased-array radar, the micro-Doppler effect of a hovering drone may not produce a track on the radar display. Near the ground, ground clutter can cause missed detections. When drones mix with birds, effective differentiation remains in the experimental stage.
In terms of hazards, civil aircraft are expensive and fly at high speeds. A drone collision with an aircraft can cause enormous property damage. After a drone disruption event, to ensure flight safety until the clearance zone is confirmed clear, many flights must be rescheduled, causing huge economic losses to the airport.
From an enforcement perspective, in reported disruption incidents, the response time from crew sighting or detection to action is long. Airports themselves lack law enforcement authority. During the limited flight time of a drone, it is difficult to quickly locate the operator and the drone. Underreporting sometimes occurs. Airports have high requirements for electromagnetic compatibility and are cautious about using radio interference devices that emit signals. Currently, there are no drone interference devices that meet airport defense requirements, nor are there reference technical standards or regulations. There are few technical means to handle “black flights” in the clearance zone, and manual disposal success rates are low, making it difficult to achieve true “clearance” around airports.
In summary, civil aviation faces practical difficulties including large defense areas, slow processing procedures, lack of enforcement power, and limited countermeasure technologies.
Recommendations for Strengthening Drone Regulation
Based on the above analysis, civil airports are the biggest victims of drone “black flights” in urban environments. They not only face protection difficulties but also risk major safety incidents threatening people’s lives, state property, and even political security. From the perspective of civil aviation management, I offer the following recommendations:
Legislation First: Continuously Promote Clearance Zone Legislation and Publicity
Through persistent advocacy, we should make law enforcement agencies recognize the great harm of drone “black flights” disrupting civil aviation operations and national public opinion security. We must continue to strictly implement and manage the clearance protection zone around airports and promote legislation on sentencing for such disruptions. Existing cases typically impose light penalties (e.g., fines of 200 yuan, warnings) for unintentional “black flights” into the clearance zone. I believe we should adhere to a legislation-first approach, clarifying drone flight behavior norms, establishing sentencing standards for drone “black flights,” and gradually making the public aware of the dangers and eliminating their luck mentality.
Civil aviation departments can collaborate with local propaganda departments and public security departments to use high-traffic channels such as short videos, posters, SMS push, and WeChat official accounts to publicize the hazards of drones to civil airliners and the serious consequences once an accident occurs, thereby normalizing the seriousness of clearance protection among the public.
Experience Sharing: Use Civil Aviation Experience to Guide Orderly Drone Regulation
Compared with public security and military departments, civil aviation authorities have more mature aircraft management experience, more standardized emergency response procedures, and more open data sharing channels for flight routes. They can use their advanced management experience and technical advantages to provide suggestions for building a national drone management platform, offering technical and experience support.
According to my understanding, the Public Security Bureau’s Public Order Bureau, Beijing Municipal Public Security Bureau, Shanghai Municipal Public Security Bureau, and Xi’an Municipal Public Security Bureau have gradually built drone management systems that include purchase registration information and local police’s surveyed drone management data. During major event security, they also share “black flight” data with mainstream drone manufacturers for key protected areas.
As the largest demand entity, civil aviation management departments should establish channels to communicate with public security departments, sharing data on drone real-name registration and flight management. This would effectively identify cooperative-mode drone targets within the clearance zone and actively remind and publicize to drone enthusiasts, achieving scientific guidance and effective regulation of drone use.
Source Control: Guide Manufacturers to Install Identification Codes and Avoidance Modules
Currently, the Standardization Research Institute of the Ministry of Industry and Information Technology has drafted technical standards for unique digital identification codes for drones. These codes assign a unique identifier to each drone, containing information about the manufacturer, user, airspace, and flight management. Using three-dimensional spatial grid coding technology and the drone identification code broadcast protocol, regulatory authorities can effectively obtain drone information and flight status. In the future, civil aviation departments can lead the construction of a network for receiving and identifying unique digital identification codes, combining the existing civil drone real-name authentication system with these codes to assist the state in classifying and grading civil drones, thereby achieving rapid identification of authorized drones within the clearance zone.
In addition to complete drones, I suggest that the Ministry of Industry and Information Technology’s production supervision department strictly manage upstream manufacturers in the drone supply chain, especially flight controller and video transmission module suppliers. They should effectively associate unique digital identification codes with accessory serial numbers to prevent the use of self-assembled drones.
Civil aviation departments should actively coordinate with the Radio Regulatory Committee of the Ministry of Industry and Information Technology to restrict frequencies used by drone remote control and video transmission links, adopting standard frequency bands specified by the committee. For drones using 4G, 5G, or other mobile communication technologies, they should be subject to backend management similar to mobile phone real-name registration.
Furthermore, DJI Innovation has installed ADS-B signal receivers and active avoidance modules in new models. This is a beneficial attempt for guiding future drone production and can serve as an important technical standard for verifying the legality and compliance of drone production.
Combine Guidance and Blocking: Gradually Guide Enthusiasts to Designated Safe Areas
With China’s drone fleet exceeding 300,000 aircraft and frequent “black flights,” the number of drones is surging. Civil aviation departments should collaborate with domestic drone industry associations and general aviation associations to explore a “guidance and blocking” approach. On one hand, we must resolutely block illegal production or assembly of drones. On the other hand, for drones from legal manufacturers, we should work with local governments to designate specific drone flight zones in open, sparsely populated urban areas. For commercial drones used in agriculture, photography, logistics, etc., we should adopt technical supervision and voluntary filing to orderly monitor flight behavior. Combined with AOPA license issuance, drone inspection and maintenance services, we can reduce the risk of drone crashes.
Currently, China is progressively reforming low-altitude airspace. With the rapid development of the drone industry, local governments must allow legal drone use for specific purposes in designated areas. At this point, civil aviation departments, as the most experienced in aircraft management, can actively and effectively participate in drone flight management, providing professional technical guidance and services to contribute to the healthy and orderly development of the drone industry.
Bottom-Line Thinking: Gradually Improve Emergency Response Procedures for Illegal Drone Intrusions at Airports
The drone industry has experienced rapid growth and is now entering an orderly development phase. China has become a major drone producer after the United States. Drone applications are increasingly widespread. Civil aviation departments must always maintain “bottom-line thinking.” They should not only build technical defense networks at critical locations but also open channels for sharing drone “black flight” disposal cases among airports. They should optimize emergency response procedures for illegal drone intrusions, gradually improving reporting and disposal mechanisms. They should introduce rapid drone disposal measures that do not interfere with aircraft electromagnetic equipment or navigation signals, and explore how airports can maintain a rapid response posture to drone incidents on a regular basis. The goal is to achieve rapid response and effective disposal.
Under the guidance of CAAC, civil airports are continuously exploring drone regulation technologies and methods in the movement area. Leveraging the advanced aircraft management experience of civil aviation will provide positive and beneficial management and technical support for guiding the healthy and orderly development of the drone industry and maintaining low-altitude airspace safety in China.
Measures and Recommendations for Airport Management Organizations
As the entity responsible for providing a safe clearance environment for flights, airport management organizations currently bear the primary responsibility for drone regulation. The “Comprehensive Evaluation Management Measures for Transport Airport Operational Safety Assurance Capability” specifies that the occurrence of low-altitude, small-target, slow-flying objects has become an important indicator for assessing airport operational safety assurance capability. From the perspective of airport management organizations, I propose the following measures for drone regulation:
Solidify the Foundation: Implement Routine Prevention Measures to Enhance Drone Awareness
According to relevant industry regulations, clearance zone patrol and publicity have become basic duties of airport management organizations. Currently, almost all airports nationwide have established daily clearance zone patrol systems and carry out clearance publicity. Routine patrols serve as a fundamental measure in clearance management. Field handling of reported issues and timely intervention upon discovery demonstrate that patrol personnel are the main executors and enforcers of airport clearance management, and they are also the first responders in drone disruption incidents. Therefore, airport management organizations should assign dedicated personnel to clearance patrols, develop detailed patrol routes and plans, rationally allocate patrol forces, increase patrol frequency in key areas, and have a clear understanding of the clearance environment and drone-flying hotspots around the airport.
Currently, the civil aviation industry regulations do not include specific requirements for airport drone regulation. The duties of airport management organizations remain at the overall airport clearance environment level. However, with the development of drones in recent years, the harm of “black flights” and the difficulty of regulation are very high. During major event security tasks, drone regulation is always listed as an important duty of airport management organizations. Therefore, at this stage, drone regulation should become one of the main tasks of airport clearance environment management.
Joint Defense and Control: Utilize Law Enforcement Agencies to Drive Drone Regulation
Most local governments where airports are located have issued airport clearance protection regulations. It must be clear that local government law enforcement agencies are the enforcers in clearance management and drone regulation. Therefore, how to fully utilize the power of local public security bureaus, comprehensive governance offices, and other law enforcement units is an important consideration for airport drone regulation. Airport management organizations should actively communicate with local governments, strengthen cooperation and exchanges with local public security departments in drone regulation, clarify the scope of law enforcement, disposal methods, and investigation procedures. In daily work, they should actively seek public security’s support in publicity and patrol. After discovering a drone “black flight,” they should obtain public security’s criminal investigation technology and administrative punishment support.
In addition to public security, the comprehensive governance offices at the town and street level also have public security management forces that airport management organizations should actively seek. Although these offices have no enforcement power, they have a large number of local public security patrol personnel and checkpoint inspectors, who can provide first-line part-time forces for airports in the vast clearance zone.
Besides public security and comprehensive governance, the military should also be a partner of airport management organizations. Some civil-military joint-use airports or airports close to military bases have overlapping clearance protection zones. Therefore, cooperation between civil and military personnel will bring twice the result with half the effort to airport clearance management.
Focus on Key Points: Strengthen Communication with Key Surrounding Units to Reduce Drone Regulation Pressure
The drone industry targets not only individual enthusiasts but also many commercial users in agriculture, surveying, line inspection, photography, and maintenance. Commercial drones, due to their payloads, long endurance, and high-altitude flight requirements, are often larger, heavier, and have lower avoidance capabilities. Their potential harm may be even greater than small consumer drones. During my work, I have received inquiries from multiple drone flight units such as power line inspection, pesticide spraying, land surveying, evidence collection, and landmark photography. Therefore, strengthening the regulation of such commercial drones is an imperative task for airport management organizations. They should make full use of coordination mechanisms with local governments to actively communicate with local planning authorities, land resources departments, landscaping departments, regional power operation centers, local broadcasting and media, and construction project units near the airport. They should publicize the prohibition of drone flights and reduce disruption incidents caused by drones used for official purposes. Simultaneously, they should provide targeted training to clearance patrol personnel to identify projects, routes, and units that may use commercial drones. They should actively monitor activities such as project starts, completions, large-scale land development, large-scale farmland planting, and various media interviews that may involve drone use, and promptly inform them of clearance requirements.
With the rapid development of drone technology, the purpose of drones is expanding. The demand for drone use around airports will continue to change. Keeping abreast of the latest industry trends and understanding the development of new drone-related businesses should also become one of the responsibilities of airport managers. The fundamental goal is to nip any possibility of drone flight within the clearance zone in the bud.
Deploy Equipment: Use Technical Means to Improve Drone Detection and Early Warning Capabilities
With the rapid development of the drone market, the demand for drone monitoring and countermeasure systems is growing. Industries such as nuclear power, railways, airports, and major meeting security all have drone prevention requirements, giving rise to the drone detection and countermeasure industry. Currently, the main types of drone monitoring equipment on the market are radar, spectrum, and optoelectronic. Radar uses the Doppler effect of signal reflection from drones, actively transmitting signals to detect them. Spectrum detection collects electromagnetic signals between drones and their remote controllers. Optoelectronic equipment is generally used for final confirmation and does not have active detection capabilities.
The “Specification for Prevention and Control of Low-Altitude, Small-Target, Slow-Flying Objects During Major Civil Aviation Transportation Missions” (hereinafter referred to as the “Specification”) stipulates that airports undertaking major civil aviation transportation tasks should deploy monitoring and countermeasure equipment for such objects. It is understood that currently, all major airports in the civil aviation industry have planned or already adopted drone monitoring equipment. Smaller airports, which have relatively lower operational pressure and do not undertake major transportation tasks, should consider their own circumstances. Currently, the quality of detection equipment on the market varies. The “Specification” requires that relevant equipment pass electromagnetic environment interference testing by the Ministry of Industry and Information Technology. The ministry also has requirements for radar and countermeasure equipment. During deployment, attention should be paid to ensuring that the equipment complies with national regulations and standards.
Intercept at the Source: Engage Inside Drone Activity Networks and Control Online and Offline Sales Channels
In recent years, apart from intentional sabotage, most drone disruption incidents at airports are unintentional illegal acts. Currently, social media and self-media networks are well-developed. Internal chat groups among drone enthusiasts and flying schools may provide important clues and warnings for airport drone regulation. Airport management organizations can consider infiltrating such groups to obtain frontline information and simultaneously use various platforms and group chats to publicize the prohibition of drone flights in clearance zones.
If we can educate drone enthusiasts about clearance protection beforehand, most disruption incidents can be avoided. Clearance publicity includes various methods. How to specifically publicize clearance requirements to drone enthusiasts is an important issue for airport management organizations in their drone prohibition campaign. In addition to basic methods like distributing flyers and posting posters, cutting into sales sources—publicizing at drone sales stores within the clearance zone and issuing prohibition notices on major manufacturers’ online sales platforms—are accurate and effective means. Although clearance publicity may reduce consumers’ desire to purchase, educating consumers about correct drone usage is a positive guide for the overall drone market and contributes to the long-term development of the civil drone market. Airport management organizations should carefully consider how to establish good cooperative relationships with stores and platforms.
Quantitative Summary Tables
To summarize the key aspects discussed, the following tables present a structured overview of drone threats, current challenges, and recommended measures.
| Threat Category | Description | Impact |
|---|---|---|
| Foreign Object Intrusion | Drones crossing perimeter, dropping items, or crashing onto runways | Runway FOD, damage to infrastructure, flight delays |
| Proximity to Aircraft | Drone approaching or colliding with airliners during takeoff/landing | Aircraft structural damage, potential crash, loss of life and property |
| Privacy Leakage | Unauthorized aerial photography/videography of airport operations | Breach of sensitive information, security risks |
| Operational Disruption | Drone triggering flight holds, diversions, or airport closures | Economic losses, passenger inconvenience, reputational damage |
| Challenge | Details | Root Cause |
|---|---|---|
| Large Protection Area | Clearance zone up to 20 km from runway ends | Vast geographical coverage with complex terrain |
| Detection Limitations | Radar, RF, and optical sensors affected by ground clutter, birds, and electromagnetic interference | Imperfect technology and lack of standardization |
| Slow Response | Long time from detection to operator identification | Absence of real-time tracking and enforcement authority |
| Legal Gaps | Weak penalties, lack of clear sentencing, no mandatory registration enforcement | Incomplete legislation and coordination among agencies |
| Countermeasure Restrictions | Radio jamming may interfere with aircraft systems; no approved devices for airports | High electromagnetic compatibility requirements |
| Action Area | Specific Recommendations | Responsible Parties |
|---|---|---|
| Legislation & Publicity | Enact stricter laws, increase penalties, launch public awareness campaigns | CAAC, local governments, public security |
| Experience Sharing | Establish data-sharing platforms between civil aviation and law enforcement | CAAC, police departments |
| Source Control | Mandate unique digital IDs and ADS-B avoidance modules on all drones | MIIT, CAAC, manufacturers |
| Guidance & Blocking | Designate official drone-flying zones; restrict flights near airports | Local governments, CAAC, drone associations |
| Airport-Centric Measures | Regular patrols, deploy detection systems, collaborate with communities | Airport management organizations |
Mathematical Models in Drone Regulation
To illustrate the physical principles behind drone threats and detection, we can use formulas. For example, the kinetic energy of a drone impacting an aircraft is given by:
$$E_k = \frac{1}{2} m v^2$$
where \(m\) is the drone mass (e.g., 0.5 kg) and \(v\) is the relative velocity (e.g., 278 m/s for a 1000 km/h aircraft). The force during impact can be approximated by the impulse-momentum principle:
$$F = \frac{\Delta p}{\Delta t} = \frac{m v}{\Delta t}$$
If the collision duration \(\Delta t\) is about 0.001 seconds, then \(F \approx 139,000\) N, confirming the destructive power.
Another important formula relates to radar detection range for drones. The radar equation for a small target is:
$$R_{\text{max}} = \left( \frac{P_t G^2 \lambda^2 \sigma}{(4\pi)^3 S_{\text{min}}} \right)^{1/4}$$
where \(P_t\) is transmitted power, \(G\) is antenna gain, \(\lambda\) is wavelength, \(\sigma\) is radar cross-section of the drone, and \(S_{\text{min}}\) is minimum detectable signal. The small \(\sigma\) of drones (e.g., 0.01 m²) limits detection range, especially in clutter.
Probability of detection \(P_d\) can be expressed using the signal-to-noise ratio (SNR) and threshold:
$$P_d = Q\left( \sqrt{2 \cdot \text{SNR}} – \sqrt{2} \cdot \text{threshold} \right)$$
where \(Q(\cdot)\) is the Marcum Q-function. High false alarm rates near airports due to birds and ground clutter reduce effective \(P_d\).
Conclusion
In conclusion, drone regulation from the perspective of civil aviation management requires a multi-faceted approach encompassing legislation, technology, collaboration, and public education. The threats posed by drones to civil airports are real and significant, but with systematic implementation of the recommendations outlined above—combined with continuous improvement of detection and countermeasure systems—we can mitigate risks and ensure safe operations. The civil aviation industry must take a leading role in shaping a comprehensive drone regulation framework that balances innovation with safety. Only through persistent effort and cooperation among all stakeholders can we achieve a secure and orderly low-altitude airspace environment.