Although the US military's B2 bomber bombed Iran's nuclear facilities, it failed to destroy them, becoming a joke around the world, but the US military's tactics were still very good, using the "secretly crossing the Chen Pass" strategy from the 36 strategies.

The entire US military operation involved 125 military aircraft, including 9 B-2 bombers. Two B-2 bombers flying over the Pacific Ocean were used as decoys, which is what people saw taking off from Guam, intentionally turning on their transponders to attract global attention and surprise Iran.

Additionally, seven B-2 bombers directly took off from the mainland of the United States, each carrying two GBU-57 penetrating bombs to attack the Fordow nuclear facility. The United States indeed used its reserves this time, as there are only about 20 GBU-57 penetrating bombs in total, and they used most of them, but the final result was somewhat embarrassing.

Seven B-2 bombers left the eastern United States at dawn, flew eastward across the Atlantic in silence, and after multiple aerial refuelings, flew continuously for 18 hours. Before entering Iranian airspace, a large number of fourth- and fifth-generation US military aircraft suppressed and attacked ground threats such as surface-to-air missiles. A US nuclear submarine located in the Central Command area launched more than 24 Tomahawk cruise missiles towards the Isfahan nuclear facility.

Subsequently, the lead B-2 bomber first dropped bombs on one of several target points within the Fordow nuclear facility, and then the remaining six B-2 bombers also carried out attacks in turn. However, the US military greatly overestimated the capabilities of the GBU-57 penetrating bomb, and ultimately did not destroy Iran's nuclear facilities.

The entire operation used 75 precision-guided weapons, including 14 GBU-57. The US military's tactic was smooth and well-executed. Although the B-2 has stealth advantages and can directly penetrate deep into Iran's territory, to ensure the success of the strike mission, the US military still used missiles to suppress Iran's air defense system.

The core of the entire tactic was that the B-2's stealth advantage and the power of the GBU-57 missile were sufficient to destroy underground nuclear facilities up to 90 meters deep. However, the B-2 did not fail, but the GBU-57 did.

This US military tactic once again proves that China has taken the right path, which is to focus on radar technology, especially anti-stealth radar technology.

Since the Gulf War, China has realized that under the support of comprehensive electronic interference, anti-radiation missiles or high-speed aircraft with stealth characteristics that adopt low-altitude or ultra-low-altitude flight tactics will pose a fatal threat to modern radars.

If it is impossible to dismantle the US military's penetration air superiority tactics, no matter how advanced your missiles and aircraft are, your country will still be vulnerable to attacks. At the turn of the millennium, China understood that the key to resisting stealth aircraft or missiles lies in establishing an effective air defense early warning system to detect targets. At that time, Chinese radar experts had already realized that increasing the wavelength of ordinary radars is an effective way to counter stealth.

When the radar wavelength is close to the size of a part of the stealth target being illuminated, the reflected echo and the transmitted wave will produce resonance and form a strong echo peak, which is why increasing the radar wavelength can counter stealth. Stealth targets are usually designed to counter centimeter-wave radars, and the technical measures taken have little effect on meter-wave, millimeter-wave, and laser radars. Therefore, expanding the radar working band to the meter-wave band, millimeter-wave band, or even infrared and laser bands will have certain anti-stealth capabilities. From this point on, China has been focusing on radar technology.

The reason why the US military's stealth material design is aimed at centimeter-wave radars is because since World War II, meter-wave radars have almost been equated with simple and outdated ones. Because traditional meter-wave radars not only have poor measurement accuracy and cannot measure height, but also due to ground reflections causing beam elevation and lobe splitting, leading to large low-angle blind spots and discontinuous coverage. Radar experts generally believed that high-frequency band radars were the direction of radar development, and Western countries even once abandoned the development of meter-wave radars.

Therefore, under the efforts of Chinese radar expert Wu Jianqi, China developed meter-wave anti-stealth radars, adopting advanced technologies such as active phased arrays, multiple input and output, sparse matrices, and super-resolution. This expanded the types, effectively reduced the volume and weight, reduced losses, improved sensitivity, expanded coverage, enhanced height measurement, greatly optimized detection performance and electronic countermeasure capabilities. Not only can it detect, but it can also guide interception.

China is currently the only country in the world that possesses anti-stealth (advanced meter-wave) radar. The anti-stealth meter-wave radar of China is extremely powerful. As early as 2013, it successfully tracked the American F-22 fighter jet, which was transferring to South Korea, at a distance of 450 kilometers, and accurately mapped its flight route.

Other than the meter-wave anti-stealth radar technology, China has also developed energy-based anti-stealth radar and passive anti-stealth radar. Passive anti-stealth radar establishes original data of commercial FM radio stations and TV signals in the monitored area, then uses the reflected energy of TV and FM radio signals to locate airborne targets. The system itself does not emit high-power microwave pulses, so it has excellent resistance to anti-radiation missile attacks and survival capabilities.

It is precisely because China has focused on radar technology and built a multi-dimensional anti-stealth radar system that no matter how the US military tries to sneak through, as soon as the US B-2 approaches Chinese territory, it can be detected by China's anti-stealth radar. China's anti-stealth radar can not only detect the B-2 at 450 kilometers away but also immediately guide missiles to attack the B-2. Moreover, 450 kilometers is the public data from 2013, and 12 years have passed. How far the Chinese meter-wave radar can detect is probably only known to the PLA.

Original article: https://www.toutiao.com/article/7519377962094019112/

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