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C-UAV and C-RAM requirements Traditional missile-based air defense systems are very suitable for shooting down larger to medium-sized, complex military drones and larger-range LMs, such as the "Shahid" series. However, they are not a viable counter-drone option against small drone threats. Even if the latter could be detected within the engagement zone of very short-range air defense/short-range air defense (VSHORAD/SHORAD) systems, their ability to be used in large numbers would quickly deplete (V)SHORAD magazines, leaving the protected units vulnerable Under attack by more advanced aircraft or missiles. Cost asymmetries also make traditional air defense systems an economically unsustainable solution to such threats. To give some idea of ​​the extent of this asymmetry, CBS News reported in May 2023 that a single FIM-92 Stinger family missile costs more than $400,000, compared with a typical off-the-shelf small unmanned aerial vehicle. A drone such as a DJI quadcopter costs only a few hundred dollars. To date, radio frequency jamming remains the most widespread (and arguably most effective) weapon against small drones. Radio frequency jamming works by disrupting an aircraft's navigation and control systems, either by preventing the reception of command signals from a control station, or by blocking satellite navigation frequencies to disrupt GNSS guidance. Depending on the strength of the jamming system, the effect can scale both in intensity and in the width and depth of the target airspace. Both sides in Ukraine have deployed extensive interference to protect their positions from enemy aircraft and neutralize enemy drone capabilities ahead of offensive operations. The powerful electronic warfare system can be installed in a fixed location or vehicle-mounted for easy relocation. Low-echelon tactical units are equipped with portable jammers, while tanks and other combat vehicles have also been photographed with jammers on top of their turrets. However, countermeasures based on electronic warfare also have some weaknesses. Frequency hopping is often a simple and effective way to avoid radio frequency interference. Furthermore, as the Ukrainian attack on Russian electronic warfare sites demonstrated, jammers' signals can be triangulated, allowing them to be located and targeted via artillery, air-launched bombs, or missile strikes. Increased autonomy and the introduction of redundant navigation systems are expected to reduce the impact of radio frequency interference in the future, but this is not guaranteed. Some drones will continue to rely on radio frequency data links for remote control, receiving mission updates or relay situational awareness data back to the operator. Even as additional jam-resistant navigation systems become more common, GNSS will remain an important navigation tool. Even if interference does not completely disable vehicle control or navigation, it may still have a negative impact on the drone's effectiveness. Electronic warfare technology is expected to continue to evolve, improving signal strength, range and effectiveness, and using smaller portions of the electromagnetic spectrum to minimize collateral impact on friendly systems. The Pentagon plans to regularly field jamming capabilities at lower echelons, particularly at the platoon level, and is already experimenting with electronic warfare systems mounted on light infantry vehicles such as the U.S. Marine Corps' MRZR. Other armed forces are taking a similar approach. Improving jamming alone cannot offset the expected enhancements in tactical drone capabilities and operational concepts. Other kinetic technologies are actively pursued. Some of these measures also protect ground forces and facilities from rocket, artillery and mortar (RAM) attacks. Such a C-RAM system could have a large degree of functional overlap with the C-UAV role, making a system capable of performing both missions an attractive proposition. 本文来源全球无人机网（www.81uav.cn），原文链接：https://www.81uav.cn/uav-news/202402/14/75392.html

We went to Hangzhou, Yangzhou, Suzhou, Wuxi and Shanghai. We have a good time together.

DJI Matrice 350 RTK Global Launch: New Flagship Upgrade, New Heights for the Industry   (May 18, 2023, Shenzhen) DJI officially launches its latest industry drone platform, the Matrice 350 RTK (hereafter referred to as the M350 RTK). This is the first comprehensive upgrade since the release of the same model of M300 RTK three years ago. With a new graphics system and control experience, a more efficient battery system, and a rich load, it is currently DJI's flagship flight platform with the strongest performance and largest load in the industry, as well as a masterpiece that can solve complex aerial operation needs for industry users.       DJI Senior Director of Corporate Strategy Zhang Xiaonan said, "DJI always explores and progresses with users. The Warp series has always been popular among industry users, and we believe the new flagship platform M350 RTK can also solve more complex and diverse operational challenges for frontline workers in the industry, and continue to be a trustworthy and efficient and stable aerial productivity tool for everyone. "   More outstanding performance, defining a new height of the flagship M350 RTK continues the design concept of the previous generation of products, flight performance remains the flagship level. The M350 RTK supports IP55[2] protection in the unfolded state (IP54 in the folded state) and can operate in ambient temperatures from -20°C to 50°C. The vehicle and sensor system are also redundantly designed with six-way binocular vision and infrared sensing for all-around obstacle avoidance. When paired with millimeter wave radar [3], it can effectively detect minute obstacles within 30 meters, further enhancing safety. In addition, the M350 RTK new arm in place detection function, in case the user arm sleeve operation is not in place, flying more peace of mind.   M350 RTK body flight camera has excellent night vision capabilities, night operations can also clearly present the surrounding environment and obstacles. With intelligent pointing and positioning function, the operation is more secure.     Battery system upgrade, control more peace of mind M350 RTK standard with DJI RC Plus remote control, support dual control mode, 6 hours of endurance, the longest map distance up to 20 [4] kilometers. Working together with the 4G network[5], it can help the flight platform better cope with signal blocking conditions in complex environments such as urban buildings and mountainous areas. The remote control comes with a large 7-inch bright screen with clear images in the sunlight, as well as a rich set of buttons and dials, supporting a variety of custom shortcut modes, with DJI Pilot 2 flight software, the type of task and flight status at a glance, the user's operation is also more comfortable.   The M350 RTK battery is the highlight of this upgrade. m350 RTK is equipped with the new TB65 dual battery system, support battery hot replacement, regardless of the cold and heat, the battery can still cycle operation, easy to achieve multiple sorties without power flight. At the same time, the battery cycle charge and discharge up to 400 times [6], further reducing the cost of a single sortie battery use. The new BS65 smart battery box adopts a new universal wheel design, which is convenient for transportation and transfer, and can be a one-stop solution for battery charging, storage and transportation. It has multiple charging modes, with the option of storage or standby mode to determine the charging percentage, thus maximizing battery life. In addition, the battery box is connected to the remote control and the DJI Pilot 2 flight software provides a visual representation of the battery status and health performance.   The M350 RTK can quickly replace the battery without shutting down, and with the fast charging case, it can work non-stop, and with the advanced dual control mode, users in different industries can achieve more efficient and intelligent collaboration.     Dedicated Intelligent Functions, Continuously Empowering the Industry   Up to now, DJI's Matrice series drones have played a valuable role in many fields such as energy, mapping, emergency rescue, and environmental monitoring, thanks to the exclusive and powerful intelligent functions of the Matrice series platform. The new M350 RTK will continue to address the growing operational needs of industry users in complex scenarios. In the field of surveying and mapping, the M350 RTK supports a variety of routes, and with ground-like flight and intelligent swing shooting functions, it can efficiently collect data, and with DJI SmartMap software, it can quickly obtain high-definition 2D and 3D digital results, significantly improving the automation and informationization level of surveying and mapping work. In the field of public security, the M350 RTK can realize air-ground cooperation with the functions of high-precision pointing and positioning and real-time map building in the cloud. Together with DJI Sikong 2, it can quickly complete on-site modeling and transmit command information to flight platforms and ground operators. In the field of power grid and energy inspection, M350 RTK can generate inspection routes through online task recording, realize automatic operation, reduce repetitive inspection work and improve inspection efficiency. When using the precision reshoot function, it supports automatic frame selection and manual adjustment of the shooting target to improve the accuracy of repeat shooting and enhance the quality of inspection operations.       Powerful load, eco-win M350 RTK supports lower single gimbal, lower dual gimbal, upper single gimbal, E-Port interface, can carry up to four loads at the same time, providing reliable support for industry application ecology. According to different operational needs, it can be matched with DJI's self-developed loads Zenith H20 series, H20N, P1, L1, etc. to complete aerial operations efficiently. Meanwhile, the rich SDK open interface can also help more fields achieve application innovation. Previously, based on the M300 RTK platform customized third-party PSDK load, can still continue to collect with the new flagship platform, so that the drone application deep business scenarios. In addition, M350 RTK upgrades the original OSDK interface to E-Port interface and provides E-Port development kit that can be purchased separately. E-Port interface supports PSDK V3, which allows developers to start personalized load development projects using a set of hardware and software interfaces, greatly reducing the threshold of entry and maintenance costs and improving R&D efficiency.   Today, DJI has more than 100,000 registered SDK developers worldwide, and has released more than 1,000 applications based on MSDK and 200 third-party loads based on PSDK. DJI is always adhering to the concept of "ecological openness and win-win cooperation", working together with global developers to provide users with convenient, efficient, safe and reliable technology and services, so that drone technology can play a greater social value.   [1] Measured in a windless environment and unloaded, flying forward at about 8 m/s until 0% power remaining, for reference only, please pay attention to the app prompt for actual usage time. [2] Measured in a controlled environment, protection level is not a permanent standard, protection may be reduced due to product wear and tear. [3] Must be purchased separately. [4] Measured in an unobstructed, slightly disturbed environment under FCC standards, at an altitude of about 120 meters, for reference only. [5] Before using 4G enhanced map transmission, the aircraft needs to use M 350 RTK 4G map transmission kit (purchased separately), and the remote control needs to use DJI Cellular module (standard) or connect to the Internet via Wi-Fi. [6] Up to 400 cycles in a 12-month period if the battery is above 90% (inclusive) for a cumulative period of less than 120 days. Reprinted from DJI