"We are imitating the missile body of the Patriot missile in China, and we have already figured out the fuel composition of this high-thrust solid rocket engine, and if it goes well, we may also complete the trial production of the missile body within a year. However, our most important post-integration may be some time away, and we have a technical issue that we are discussing. Bai Xue said.

This air defense system is not only developed for Pakistan, but when it is successfully finalized, it will certainly be equipped in large quantities in China, and it will become a field and shipborne air defense system used by the two countries, and it is also related to the future maritime area air defense capability of the motherland.

In China, it takes many years to develop an air defense missile, such as the Hongqi 61, which has been studied for more than 20 years, and by the time it is installed, its performance has long been outdated. The Hongqi 9, which had high hopes, was also developed by stumbling for more than ten years, and it was not successfully developed until the Russian-made S-300 was introduced.

One of the important reasons is that there is a lack of imitation objects, and the blockade of China by the West has always existed, and in the absence of advanced models as specimens, self-development will have to take quite a lot of detours.

If you have a mature missile in front of you, you only need to map and map the other side and find out the other party's design ideas clearly, and the technical difficulties of the two are completely different.

Therefore, the current progress in the development of regional air defense missiles can be so rapid because of the premise that a mature Patriot missile system can be relied on.

Coupled with skilled technicians, like Bai Xue, who concentrate on their careers, they will progress rapidly, not only figuring out all the technologies, but also improving on this basis.

Now, Bai Xue said that there was another technical problem, and Mhammad was immediately very concerned: "What technical problem?" ”

"Our missile system, in the initial stage, uses inertial guidance. In the medium term, radio command guidance is a common way to guide us, and after using phased array radar, the speed of refresh the target is very fast. It can allow our missiles to have a more accurate flight trajectory, but the guidance method at the end is still immature. Bai Xue said to Mhammad: "If you want to control the missile to finally hit the target, you need the precision guidance ability of the final stage." ”

A long march. Having reached the last step, whether or not the missile can be successfully guided to hit the target depends on the final terminal guidance.

"yes, what's the problem?" Muhammad asked Bai Xue.

"We have repeatedly mapped and mapped the Patriot missile system, which uses the TVM method for terminal guidance, which is a deformed composite guidance system that combines semi-active and command guidance. When the missile approaches the target, the direction finder on the missile can measure the precise angle of the target relative to the missile by receiving the irradiation signal scattered by the target, and send it back to the ground through the downward channel of the command, which will be processed by the ground station. The control command is calculated, sent to the missile, and the missile is controlled. The difference with semi-active radar guidance is that the missile control command is generated by the ground guidance station rather than by the missile itself, and this guidance method has high precision, and the guidance accuracy does not decrease with the increase of the range of the weapon system, and the closer the missile is to the target, the higher the accuracy. Bai Xue talked for a long time, trying not to describe Mahmad in professional language, so that Mahmad could understand.

"yes, that's how it should be." Mhammad also understood: "What's wrong with that? ”

"As long as it's using this semi-active approach, then. The radar needs to concentrate more beams to guide the missile, so that the radar scatters fewer beams in other directions. In other words, we lack sufficient observation capabilities, and we have calculated that the Patriot missile system, which can guide up to five missiles at the same time, will no longer have a launch unit to provide additional scanning signals. This can seriously affect our multi-target defense capabilities. Bai Xue continued.

The problem is here, if you want to be guided in a semi-active way, you have to irradiate radar waves, although phased array radar has a great advantage, the antenna does not need to rotate, and you want to shine wherever you want, but in order to provide guidance signals for missiles, especially the more you go to the back, the higher the guidance accuracy needs to be, then you need more powerful radar waves to irradiate, and there are fewer that can be distributed to other directions, if you want to guide multiple missiles at the same time, there will be no extra radar signals to scan the airspace.

In the information of the Americans, it is claimed that they can guide up to nine missiles at the same time, but in fact, being able to guide five missiles at the same time is already the limit, and if they want to maintain the ability to search the surrounding airspace and guide missiles at the same time, it is at most against three targets.

You must know that the environment at sea is even worse, and if a large number of missiles are flying, then our own air defense system will not have the ability to resist saturation attacks at all, and it will not be able to meet the needs of future battlefields.

This is where Snow White worries.

"Is there another way?" Mhammad asked.

"According to the analysis of publicly available information, the US Aegis system uses a separate irradiation radar at the end to provide final guidance for its own missiles." Bai Xue continued.

The U.S. Navy has developed a powerful Aegis system to counter the saturation attacks of the Soviets, and with the standard missiles launched vertically, it is simply claimed to be watertight, but in fact, the loopholes are still huge.

The combat mode of the standard missile is divided into three steps, first, launch, steering, and flying to the approximate direction of the target, this process does not require any guidance, and is completely controlled by the program. Second, the command from the receiving data link continues to approach the target, and the target information is obtained by the phased array radar and sent to the missile by radio, which is the radio command guidance stage. Third, after the missile approaches the target, start the AN/SPG-62 irradiation radar on the warship and start irradiating the target, and the standard missile receives the signal of the irradiation radar, corrects its own trajectory, and attacks the target, which is the passive radar guidance method.

Therefore, the Aegis system is equivalent to adding additional irradiation radars to meet the terminal guidance of missiles, and in this way, the Aegis system, which is known as anti-saturation attack, can deal with many targets at the same time depends entirely on how many irradiation radars it has.

A Burke-class destroyer has three AN/SPG-62 radars, while a Ticonderoga-class cruiser has four, so they can only deal with four targets at a time.

Of course, the actual situation is that the targets do not fly at the same time, and the irradiation radar is also guided according to the information of the missile queue; when the terminal guidance is carried out for one missile, the other missiles continue to fly, and when the terminal guidance of one missile is completed, it immediately turns its head and guides the other missile that is about to reach the terminal guidance program, so that it can deal with multiple targets. Of course, if the target flies too much at the same time and is too late to guide, the final result will definitely be very tragic.

If the U.S. Navy really fought with the Soviet Navy, countless supersonic anti-ship missiles flew in, and whether the Aegis system could resist it was really a question mark.

Why don't you get more irradiation radars? This is not possible because of electromagnetic interference, each radar must be separated by a certain distance.

In fact, the task given to Bai Xue by Muhammad is just to imitate the Patriot missile system, but Bai Xue knows that the task is important, and he completely takes it as his own task to do it, and strives for perfection, hoping that this air defense system is the most perfect.

Now, neither way is the best, and Bai Xue has a great headache.

Mhammad looked at Bai Xue's sad face, it is said that Mhammad is indeed a layman and can't help much with such a technical problem, but Mhammad is still using his brains, there must be a solution to the problem! Although this is a surface-to-air missile, it seems that it has a lot in common with air-to-air missiles, after all, many air-to-air missiles are modified into ground-to-air missiles, how to solve the problem of air-to-air missiles?

In the past, the air-to-air missile with semi-active guidance had to be aimed at the target by the carrier aircraft when it was being guided, but later, it became active radar guidance, didn't it solve the problem?

Right! The final section is guided with active radar! At the end of the stage, the radar on the missile seeker has the ability to emit electromagnetic waves, so let it guide itself, wouldn't that be fine? It's no problem to launch as many as you want at the same time, take care of yourself!

Thinking of this, Muhammad blurted out: "Bai Xue, we can solve this problem, and take the initiative to guide the end stage!" ”

Mhammad didn't know that it was this kind of missile revolution that he was talking about, in later generations, when the Patriot developed to the PAC-3, it used active guidance, and the standard missile, S-300, and even Huaxia's Hongqi-9, all used active guidance!

Hearing Mahmad say this, Bai Xue did not have an excited expression on her face, and said: "We have also thought about this, but we don't have any technology at hand, and if we want to make it, I am afraid that it will seriously delay the progress." ”

Surveying and mapping, cottages, Huaxia is very good, but independent research and development will not work, if it is temporarily changed to the active guidance head, then maybe, it will have to be developed for many years, and I am afraid that it will not be able to make a breakthrough.

If the development time is too long, it may end up with variables.

Looking at Bai Xue's worries, Mhammad said: "Bai Xue, don't worry, we have our own technology." ”

If before, Pakistan really did not have any technology, and the active guidance of air-to-air missiles is a very complicated technology, but now, Pakistan has enough technology, as long as the seeker of the active sky flash is transplanted. (To be continued.) )