Chapter 1366: The Past of "Project 640"

"Ok?"

Liao Yongcai never expected that there would be a topic related to himself.

He looked at the young man in his early 30s with some suspicion. He didn't look like an eyewitness.

"You know that, too?"

Guo Lin did briefly mention what happened back then in his report, which served as evidence for their analysis.

But it is a serious written report after all, and considering that most of the description comes from the memories of the parties involved, not too many details are included.

Chang Haonan smiled:

"Yesterday, when I asked the Beijing Aerospace Control Center to do a cross-correlation test, I asked someone I knew to retrieve some data from that year..."

This sentence directly shocked Liao Yongcai.

Due to the lack of information for a long time, and the fact that a radar station director could not be considered a scientific researcher, and Guo Lin did not have time to give a full introduction just now, he actually did not know much about Chang Haonan.

All I know is that he is a very capable guy who can lead such an important military project at such a young age.

As for how powerful it was, I really had no concrete idea before.

But now there is -

As China's first attempt to build a strategic early warning system, Project 7010 was hastily concluded, but it was actually put into use after all. Compared with the "Counterattack No. " interceptor missile and the "Pioneer" super anti-missile cannon, which are also anti-missile interception projects and are only in the verification stage, it is closer to a complete state and has left behind a lot of valuable experience.

Part of it even affected the subsequent construction of the air force's air defense system.

Being able to easily retrieve information about such a project by "finding someone you know", and it sounds like the information is core information involving work details, can obviously be described as a magical power.

"But……"

For a moment, Liao Yongcai was even a little hesitant to make a judgment.

After looking back and forth for a long time, I finally asked the question in my heart:

"I remember that the final conclusion officially submitted by the station was that there was signal interference from a synthetic aperture radar satellite?"

In fact, although he now acts as if no one knows 7010 radar better than me, when the incident happened he was only a reserve backbone being vigorously trained by the organization, and not a member of the management team of Xuanhua Radar Station.

Now seeing that Chang Haonan seemed to have everything under control, Liao Yongcai became less confident.

"That's the conclusion, right?"

Chang Haonan replied while watching Guo Lin busying around:

"But I extracted some of the key outputs and re-analyzed them, and found that there were some problems with the conclusions drawn back then..."

The expression on Liao Yongcai's face became even more shocked.

The report conclusions that have been archived are equivalent to obtaining recognition from superiors.

When many of the parties involved are still alive, it cannot be overturned simply with just a few words.

Perhaps the word "supernatural powers" is not enough to describe this situation.

It's almost like having all-powerful hands and eyes.

Chang Haonan was already accustomed to this kind of scene, and without waiting for the other party to speak again, he continued to explain:

"Two years ago, my country launched its own synthetic aperture radar satellite. Because its main function is to prevent and reduce disasters and explore resources for the local area, the possibility of electromagnetic signals interfering with ground equipment has been considered."

"Finally, it was found that even if the spotlight mode is used, the interference of a single SAR satellite to the ground radar will not exceed the statistical threshold of -0.002dB interference-to-noise ratio at 6% of the time. If the scanning or strip working mode, which is more common in actual applications, is used, the interference will be further reduced."

In fact, when he heard this, Liao Yongcai had already realized the problem.

We are all technical people, and it is impossible for the other party to make up some random data to fool us.

The fact that the interference intensity cannot reach the statistical threshold means that even if the radar does not take additional filtering and noise reduction measures, there will be no erroneous parameters that are sufficient to be detected.

However, even though he realized it, he still wanted to struggle:

"If the satellite's transmission power is stronger..."

Chang Haonan knew what he wanted to say, so he waved his hand.

"Today's satellite-borne SAR payloads are indeed much more sophisticated than those of more than 20 years ago. The model we tested is relatively small, so the transmission power is not as good as the SIR-B satellite you analyzed back then, but there is not an order of magnitude difference. What's more, the interference intensity we calculated is actually far below the threshold."

Liao Yongcai had not planned to really insist on it, so after receiving the new explanation, he took the opportunity to retreat, pretending to be reluctantly convinced, and asked:

"The real reason is..."

Chang Haonan did not give a direct answer, but suddenly asked back:

"The situation back then is actually very similar to now, isn't it?"

"Ok?"

Liao Yongcai was stunned at first, and raised his head in confusion, but then he immediately understood what the other party wanted to express:

"You mean to say that the other party also set up an ambush during our debugging process, and then induced defects by interfering with signals at a specific time, causing the equipment to operate abnormally?"

Chang Haonan nodded:

"At present, this should be the most reasonable explanation, and it is also consistent with the content recorded in relevant historical materials. Unfortunately, due to the long time, the original parameters during the debugging process have not been completely preserved, so there is no way to 100% confirm it."

Having said that, it is only out of the rigor of a technician.

In fact, he was almost 90% sure that his conclusion was correct.

Liao Yongcai obviously agreed with this statement and showed an indignant expression.

After being alone with Hong Wen for a while, he couldn't help but utter a sentence:

"Fuck..."

Chang Haonan was originally preparing to go to the other side to see what Guo Lin and his team were doing, but when he heard this, he turned around curiously and looked at the other party with a look of shock and curiosity.

Ever since he graduated with a Ph.D. and assumed a leadership position, few people have been willing to open up to him like this.

Liao Yongcai sighed and explained:

"The international situation in those years was quite special... In September 1980, in order to demonstrate military mutual trust, we specially invited a Pentagon delegation to visit, and the itinerary included the 9 radar station."

Obviously, this is another story of "brothers exchange hearts with you, and you play brains with your brothers."

But at that time, it was not uncommon.

Moreover, the 7010 radar started antenna installation and array debugging in 1976 and entered trial operation in 1977.

At that time, the two sides had not yet established diplomatic relations. It was normal for others to plant mines in the key national defense projects of your main imaginary enemy.

As for what happened later, I can only blame myself for not being vigilant enough.

That visit was intended as an ice-breaking trip for exchanges between the two militaries and should have been conducted on a completely equal basis.

As a result, the Chinese delegation only visited the Hawaii base far away from the North American mainland, but allowed the other party to directly enter the part involving the most core secrets.

"From the perspective of the time, the performance of Project 7010 was actually very advanced."

After a moment of silence, Liao Yongcai continued:

"In July 79, our station coordinated with the 7 radar in Yunnan Province and continuously tracked the trajectory of Skylab's re-entry into the atmosphere. The final calculated crash site and time were only about 110 kilometers different from the actual landing site, which was even more accurate than the range announced by the Americans themselves..."

"Also in January 83, when Moscow did not release detailed orbital parameters, we were the first to provide the trajectory of the Cosmos-1 nuclear-powered reconnaissance satellite, and determined that it would not pose a threat to densely populated areas..."

"So when the radar was dismantled and the radar station was closed, we didn't quite understand it...Looking back now, it may be related to what you just said."

While speaking, Liao Yongcai raised his head and looked towards the Yanshan Mountains in the east.

Although I was in the underground control center without sunlight, I seemed to see Huangyang Mountain shrouded in the night again, the brightly lit Xuanhua radar station, the flashing indicator lights, the jumping technical parameters, the running footsteps, the busy command post, and the soldiers patrolling back and forth on the mountain, vigilantly watching every corner...

Although Chang Haonan had not personally experienced that era and could not easily empathize with the other party, he could still understand the other party's feelings a little.

He sat next to the other person and said comfortingly:

"The cancellation of the 7010 radar may have other factors, but the bottom line is that the parent project 640 was terminated... It is too extravagant to use a large radar with an antenna area larger than two basketball courts for space tracking and control."

"But this time, the superiors are very determined to build a strategic early warning system... I think if nothing unexpected happens, you should have the opportunity to personally command the new generation of anti-missile radar before you retire..."