Chapter 665: Modern war is artillery battle!
It is actually normal for superiors to have concerns in this regard.
In fact, the passive positioning radar deployed on land is not necessarily a high-end product in itself.
For example, the 70M6 "Volga" early warning radar has a passive detection function, and it can even be regarded as a model close to shelf products.
But in the past, the common function of this kind of thing was to provide mid-course early warning of ballistic missiles, anti-stealth or anti-radiation, which can only be said to be a side function.
Not only will the software system not be optimized in this direction, but corresponding tactics have not been considered in terms of hardware.
So in order to ensure the detection distance and extend the reaction time of one's own nuclear counterattack, a radar antenna is generally deployed permanently like a building or even a hillside.
China has also researched similar early warning equipment in the past, and the size is basically similar.
It is really difficult to "smuggle" something of this size to another country without crossing a third country.
So, when people of this generation first heard that Chang Haonan wanted to change an ordinary vehicle-mounted fixed radar into a passive positioning radar, their first reaction was definitely confused.
It is also natural to subconsciously think that this may be a project with a very heavy workload.
However, the focus of the algorithm Chang Haonan developed before was "multi-point distribution".
If you want to achieve passive positioning with a single array, you will naturally need a huge size to calculate a sufficiently accurate angle difference.
But because the whole idea was originally intended to be used on an aircraft and two missiles, after transplanting it to the ground, the signal source can be completely separated from at least two receiving sources.
This is why he and the 14th Institute of Electrical Engineering chose the P18 radar, which was not familiar to China, as the target of transformation.
This type of early warning radar is extremely common in the countries of the original Warsaw Pact camp. Even more than 20 years later, you can easily take out a lot of them, and even out a few of them and modify them into passive radars, which will not affect the early The early warning capability will not produce too eye-catching movements.
Therefore, faced with Ding Gaoheng's question, Chang Haonan looked outside and after confirming that his family was not nearby, he answered:
"The specific hardware operation of the radar modification is done by The 14th Institute of Electrical Engineering is responsible for this, so if you need to compile a specific transportation list for Lao Wu, you have to contact them."
"But from the basic algorithms and signals that I am responsible for. From the perspective of the processing principle, since it basically does not involve changes to the antenna itself, the total components required to improve the two radars are mainly the feed and filtering equipment at the back end of the antenna, as well as the DSP and FPGA required for data processing at the output end. Digital signal processing chips. ”
“The number of components such as chips and circuit boards is indeed large, but they can be shipped directly as personal computer accessories, even with great fanfare. After all, if they are not dismantled, If you check them one by one, it’s actually not easy to tell the difference between these military-standard chips and desktop products.”
"The main trouble is those things related to analog signal processing and conversion. Because they are relatively large, if a knowledgeable person can see them almost at a glance, you need to be particularly careful..."
"Two things need to be changed. Radar?”
The questions on the other end of the phone were obviously more in-depth and detailed.
“At least two, in fact preferably three.”
For Chang Haonan, these technical route issues have been repeated countless times in his mind, and naturally at this time Able to answer questions fluently:
"However, one of them only needs to transmit signals as usual. The improvement is very small. At least two of them need to be changed to passive radars. Only by forming these three radars with exactly the same antenna parameters into a whole and then deploying them dispersedly can this be achieved. Signal detection in various environments. "
"Of course, if there is a relatively strong and stable signal source within the airspace itself, such as a relatively close early warning aircraft or a naval ship with regional air defense capabilities, then It doesn’t matter if there is one less radar that actively transmits signals. After all, this radar itself is very dangerous and is likely to be knocked out by the opponent’s air defense suppression operations.”
”The reason why I suggest retaining it is because I am worried that the opponent will take action. Relatively strict electromagnetic signal discipline. After all, the party we want to help does not have a strong air force or long-range strike force, so the opponent may not necessarily need to maintain a high level of air alert..."
After all, it was a confidential insider exclusively for high-level leaders, and he had already communicated with the other party before, so Chang Haonan did not go through all the twists and turns and directly analyzed the actual situation of both parties in the conflict.
His suggestions are naturally not just speculations, but have been verified by "future history".
Throughout the entire Allied operation, due to the relatively complex ground environment and proper preparations for electromagnetic countermeasures, the efficiency of the coalition's air defense suppression operations was extremely low, and the defending side's radar could remain switched on for a long time even until the middle and late stages of the conflict. without being destroyed.
In this context, deploying an additional controllable friendly signal source is basically a matter of no harm.
"Then I understand..."
Ding Gaoheng replied in a "I see" tone. In fact, according to Chang Haonan's understanding of him, the telephone communication should be over here
But today, Ding Gaoheng seemed to be particularly interested:
"Also, Xiao Chang, I remember you said two days ago that in addition to detecting invisible targets, you can also directly shoot them down?"
"Uh. ...You can at least give it a try."
Chang Haonan naturally has this idea, but the stealth fighter has never been successful, and his set of things has not even been tested, so it is definitely not good. It’s too damning to say:
“In my work in the past few years, I have found that many people, even comrades in the aviation industry system, deify stealth aircraft and even fear them. In fact, Our opponents often think so, and it has even become part of their strategic intimidation.”
"If we can take advantage of this opportunity to get some kills or even injuries before they become more vigilant about anti-stealth methods, I think it will be a huge positive incentive for the perception and confidence of our entire society. "
Ding Gaoheng seemed to be shocked by Chang Haonan's righteous statement, and it took him almost half a minute to reply:
"However, the nature of the electromagnetic wave of the long-range warning radar determines, Whether it is signal accuracy or data update frequency, it is unlikely that air defense weapons can carry out terminal attacks. If you really want to achieve a shootdown, you will need a hard kill method."
"You should be prepared. Smuggle in the new type of missile developed by the Aerospace Technology Research Institute?"
Chang Haonan was stunned by this question.
Of course I didn't stop him.
But Ding Gaoheng, as a leader with a technical background and a background in guidance and navigation technology, has almost never asked such detailed tactical questions in the past.
However, he quickly came to his senses:
“It is definitely inconvenient to smuggle missiles.”
“The nature of this thing is different from that of radar elements. The devices and the self-defense jamming system are different. In any case, they are serious weapons and equipment. We still have to be just in case. If we are stopped on the road, it is really difficult to explain. "
"Secondly, even if you don't consider the risks, that model is still in the development stage, and even the sample bomb has just been built. After all, missiles are pyrotechnics and different from radars. It is absolutely impossible to use them without a test launch... "
After hearing that Chang Haonan was not prepared to send out the missiles as well, Ding Gaoheng seemed to be relieved:
"Then what you think is... ”
For Chang Haonan, this is a complete question:
“They should have a lot of S125 “Pechora” air defense missile systems themselves. The most important thing is stealth aircraft. A sudden change, if the early warning radar can continue to effectively detect the target, even if it cannot lock, the fire control radar of the anti-aircraft missile can still indicate the direction. As long as the opponent's aircraft is caught and opened, or the RCS increases, such as a large-angle turn, etc. The window is still enough to complete one shot.”
"Taking a step back, even if the opponent uses electromagnetic interference to invalidate the missile's command guidance, we can still return to the most primitive method, through voice reporting and manual work, and try our luck with large and medium-caliber anti-aircraft artillery. Anyway, we are ahead It’s not like I haven’t considered similar tactics in recent years..."
"Modern warfare is artillery warfare...anything that can pull out pus is a good plaster, not a shabby one."
Finally. At the time, he even had a bit of a joking tone:
"It would be better to say that if the stealth fighter was really shot down by an anti-aircraft gun, it would be embarrassing for the world to circle around..."
After Operation Desert Storm, China, which was frightened by the coalition's electronic warfare, realized that the old-fashioned anti-aircraft missiles it had on hand were probably similar to fire sticks, so it rushed to import S300 anti-aircraft missiles and dragged them out again. Several divisions of 100mm and 57mm large and medium-caliber anti-aircraft guns were deployed.
Among them, the 57mm anti-aircraft gun was finally used until about 2018 before it completely bid farewell to the stage of history.
Back to basics, this kind of thing is the least affected by electronic interference.
Of course, it will definitely be useless in the end.
However, the ideas can still be used for reference...
(End of this chapter)