Chapter 1121: Being on guard against others is essential

"Extra preparation?"

Liang Shaoxiu frowned slightly:

"But based on the experience of my colleagues in other units, clients in the Middle East generally... don't care much about money."

Chang Haonan thought that what the other party wanted to express was that wealthy people buy equipment without considering the cost-effectiveness.

This has been a stereotype of domestic and foreign trade for a long time.

"How can it be……"

He waved his hand and said:

"Oil guys are just rich, they are not stupid... When we see others buying things without caring about the cost, it is because they are essentially spending money on more important things."

Liang Shaoxiu was slightly stunned, and then realized that they were not on the same channel.

So he quickly explained:

"No, what I mean is that the people who are in charge of purchasing generally don't care much about money... at least they don't care much about the money we can afford."

At this moment, Chang Haonan also reacted and held his forehead helplessly:

"When I say preparation, I don't mean to bribe key personnel on the other side...but to be on guard against other competitors doing bad things during the bidding process."

International arms procurement projects like this must be carried out in several rounds.

Considering that the three companies that have actually been shortlisted do not have finished products yet, the initial stage will definitely be a competition between paper performance and the political power behind each company.

But such a large order will inevitably require actual testing in the end.

And in this process, there are so many things that can be done.

For example, when Persia went to the United States to purchase fighter jets, Grumman asked its own F14A to turn on the engine first to consume some fuel.

The actual thrust-to-weight ratio of the aircraft is not that bad.

Liang Shaoxiu had certainly heard this story before, but he was still an honest man and lacked a deep understanding of the sinister nature of the international arms sales community:

"But the AWACS aircraft doesn't depend on mobility or ammunition load...how can it do any harm?"

"You can't secretly release interference during the test, right?"

Chang Haonan couldn't help but curl his lips:

"It's hard to say..."

"When the Greeks were bidding for a new tank, when the Challenger and Abrams were undergoing field tests, the French sent agents to secretly place jammers at the test site, causing the two models to lose their ability to follow the test routes..."

Liang Shaoxiu's facial muscles twitched slightly, and he obviously wanted to laugh but held it back:

"So... the French Leclerc tank was the winner in the end?"

"That's not true..."

Chang Haonan shook his head:

"Because the performance of these three products is very poor, the German Leopard 2A4 is cheaper."

"..."

Liang Shaoxiu finally couldn't hold it back.

Chang Haonan couldn't help laughing...

After a while, the two stopped smiling and returned to the topic:

"Anyway, although it is difficult to use these tricks in the testing of aerial equipment, we must be on guard against others... On the one hand, we don't deal with the Swedes much, but as for the Kingdom of David... we can't expect them to have too many bottom lines, you know that."

"On the other hand, sabotaging the test does not require bribing any decision-makers. All we need to do is to get through some low-level connections. In this regard, David has been dealing with them for decades and is much better than us."

Liang Shaoxiu lowered his head and thought for a moment, then analyzed:

"As for the aircraft itself, as long as there are no problems with the French personnel participating in the selection, there will be no hidden dangers. Besides, no matter how bold the Kingdom of David is, it is unlikely to tamper with the French aircraft, so the risk should be concentrated on the airborne radar..."

At this point, he hesitated for a moment.

Although he has participated in or presided over the research and development of three types of early warning aircraft, he is not an expert in the field of radar after all.

It would be safer to find someone from the Electronic Technology Group:

"Mr. Guo is still in Beijing. Comrade Fan Jimin is temporarily in charge of the equipment testing of the early warning aircraft. Do you need me to call him over as well?"

This is the good thing about Haojing.

There is a well-developed military industry locally, especially the military aviation industry.

Problems that require taking a plane to solve elsewhere can be solved by riding a bicycle here.

"can."

Chang Haonan checked the time:

"That's great. I'll also tell you about the early warning aircraft and some key points of the entire bidding..."

The order from the dog owner was too sudden.

And at this critical juncture, it is impossible for him to abandon the half-finished project at hand.

We can only entrust the responsibility to more reliable comrades.

……

After receiving Liang Shaoxiu's call, it took Fan Jimin less than an hour to stand next to the former.

"Academician Chang, I have long admired you..."

As a rising star promoted by Guo Lin, today was his first time meeting Chang Haonan in person.

There was an obvious tremor in his voice because of excitement.

Chang Haonan didn't respond, but handed a bottle of water to the breathless man:

"The conditions here are average. I don't have any tea leaves, so I'll just use mineral water..."

After just a few words, Fan Jimin calmed down again.

Then, Chang Haonan repeated his concerns to him and analyzed:

"'Gaoming' is a wide-bandwidth, wide-angle radar with pulse compression processing capabilities. It is indeed less susceptible to interference overall. Of course, everything has two sides. If the opponent prepares in advance and targets it, it is not without weaknesses."

"If we consider it from the interference party's perspective, the most effective method is probably to use the characteristic that the working wavelength of broadband radar is much smaller than the target size, and use intermittent sampling and forwarding interference using pulse-to-pulse coherent accumulation technology..."

"..."

The distance resolution unit of broadband radar is much smaller than the target size, so the complex target under the signal illumination can be regarded as a collection of scattering centers. The echo signal is no longer a simple copy and delay of the transmitted signal, but a synthetic signal of multiple scattering centers containing local subtle features.

In other words, higher resolution.

This characteristic makes it difficult for broadband radar to effectively accumulate echo signal energy within a repetitive cycle, and it is almost impossible to interfere with it using the method used by Chang Haonan on the Air Dry 100 pod.

But as a price, once the coherent interference obtains sufficient processing gain, and even slightly modulates the characteristics of the interference signal, the damage caused to the echo signal of the broadband radar system will be more serious.

It can be understood as "precision things are unlikely to go wrong, but once they go wrong, they are difficult to solve."

Fan Jimin's response was also quick:

"Then the best response strategy should be to develop more effective low-interception technology so that the other side cannot sense the radar search signal at all?"

It should be said that anyone who is favored by Guo Lin must have no problem with his ability.

But there is still a gap in experience.

"Low acquisition technology can indeed treat the symptoms and the root cause, but it requires a major overhaul of the radar from top to bottom."

Chang Haonan replied:

"According to what Comrade Shao Xiu has learned, the initial proposal comparison phase of Party A should begin soon, and the entire bidding process is expected to be completed within 18 months. We hope to receive the first aircraft within 2005... I'm afraid we don't have that much time."

"That……"

Fan Jimin looked embarrassed.

Electronic warfare actually has strong turn-based characteristics.

Everybody learns the same thing, which is basically you make a move and I respond, and the upgrade path is very clear, without too many tricks.

And generally speaking, interference is much easier than anti-interference.

Especially in the context of this bidding.

Because the opponent doesn't need to completely disable your equipment, just slightly affect your work efficiency.

Even a radar that is one generation ahead will inevitably experience increased latency or reduced resolution if it is deliberately targeted.

In actual combat, this will not have any impact.

But compared with Party A, the gap is very obvious.

After a brief silence, Chang Haonan was the first to break the deadlock:

"In fact, the inter-pulse coherence accumulation technology itself is not yet mature. In addition, David will not really drive an electronic jammer to cause trouble. It is more likely to aim at a specific radar waveform..."

"So we can preset commonly used waveforms such as truncated M sequence signals, OFDM signals, and LFM signals, and switch directly if we find any problems..."

"..."

Fan Jimin's eyes widened slightly.

The so-called low intercept technology is generally also called flexible beam control.

It can be understood that the beam characteristics and parameters are adjusted through algorithms to avoid being analyzed by the other party.

Chang Haonan’s idea is equivalent to the traditional method.

Flexible, but not completely flexible.

But it’s just like what he said just now.

It is enough to deal with the little tricks that the opponent may use.

"Then I'll ask the institute to make some adjustments to the radar control system after I return..."

Chang Haonan nodded, and then gave another special instruction:

"Don't disclose this to the French side for now, at least until the first phase of bidding is over..."