The Military-industrial Scientific Research System of the Academic Master Chapter 827

Chapter 827 Penetrating the Earth's Surface

Tanzhou, if you say it is the capital city, it is indeed the capital.

But it's actually a hundred kilometers away from Beijing Hang University.

Even more than twenty years later, this place is still a place that has not been completely developed.

With such a distance, it is definitely impossible for Chang Haonan and Meng Zhenyuan to go back at night and come back the next morning.

So the two of them just spent the night at the measurement and control center.

Comrades in the aerospace system do not distinguish between black and white when they are busy, so there is no other thing in this place, but there is no shortage of things like folding beds in empty rooms.

Originally, I planned to finish the work the next day and then go back to wait for the results of the on-site exploration.

But the time it took to extract the data this time far exceeded Chang Haonan's expectations.

It will not be until the early morning of the third day that the concept decomposition will be completed.

This shows that the "useful" information contained in that picture is far more than he previously expected.

Fortunately, this algorithm is still in its infancy, so it's done here.

The subsequent feature identification and selection cannot be done by computer because the data has not been checked yet—

Similar to previous applications in the radar field, the algorithm can only extract signal features with specific differences.

As for the specific results corresponding to each feature.

That requires someone to calibrate it, at least initially.

After calibrating a sufficient number of times, you can make a judgment based solely on identifying the characteristics of the signal.

Similar to how sonar uses voiceprint information to determine the model of a target submarine.

Chang Haonan and others returned to the measurement and control center hall, stood in front of the screen, and looked up at the remote sensing data spectrum that had been processed by the manifold learning algorithm for dimensionality reduction.

There are more than one anomalies found by Li Nianheng on this picture.

So it should not be an occasional bug.

But it's not available everywhere.

So it's not like a simple noise interference.

“I think, first of all, we should figure out which sensor captured these strange data.”

Chang Haonan first broke the silence:

“It seems that in the past, these data should have been directly blocked as interference, but after using the new feature extraction method, it was exposed.”

Li Nianheng nodded, obviously very much in agreement with this opinion.

So, he hired Ye Jianpei, the deputy chief engineer responsible for the design of the spaceborne detection system—

Although the detector itself is not entirely domestic, the overall design of the entire satellite was entirely completed by China.

So everything is still under control.

“I'm afraid raw data alone is not enough.”

After listening to Li Nianheng's description of the situation, Ye Jianpei thought for a moment, and then expressed his position cautiously:

“It would be better to have logs of the entire remote sensing data extraction process, so that the reverse inference would be more efficient.”

“We previously performed the extraction operation on server 02, and the operation log should still be saved on it.”

Chang Haonan replied:

“Part of the dimensionality reduction process is a black box even for me, but if we just trace the source, it shouldn't have much impact.”

Ye Jianpei did not answer, just nodded, and then quickly walked to the server room with his two technicians.

"It seems...you have to stay here for another night."

Li Nianheng looked at the back of Ye Jianpei leaving in a hurry, and said to Chang Haonan and Meng Zhenyuan next to him.

“It doesn't matter.”

Chang Haonan waved his hand:

“I also want to see where those abnormal signals come from.”

This is a question that Chang Haonan has never been exposed to before, including in his previous life, and it does make him a little curious.

“Mr. Chang, Mr. Chang?”

I don't know how long later, Chang Haonan, who was leaning on his chair and half-lidded to rest, suddenly heard someone calling his name next to him.

He quickly opened his eyes and stood up, and draped the blanket that someone had covered him with on the backrest.

Li Nianheng and Ye Jianpei are standing not far behind the chairs.

“The result is out?”

"right."

Ye Jianpeiyan handed a document to Chang Haonan in a concise and concise manner:

“An L-band polarimetric interference synthetic aperture radar is part of the hyperspectral remote sensing equipment group we imported from France.”

"The function of this device when it was designed was to measure target elevation data, and to obtain detailed parameters of surface cover, such as forests, ice and snow, houses, etc. But now, it is clear that it also captured some things that we had not expected before. information arrived.”

Chang Haonan took the file and looked at it, and found that it contained detailed data for this L-band radar.

Even in the instructions provided by the French, there is no mention of other functions except the two above. Apparently, they don't know either.

"Is it possible...that it's resources buried underground?"

At this time, Meng Zhenyuan's thinking has already spread:

“Such as oil fields, coal mines or...”

When he said this, his eyes lit up.

Obviously, if so many mines can be found domestically, it will definitely alleviate the urgent need for energy shortages in the past two years.

Even if he only played a supporting role, he would probably be able to receive a special allowance.

However, Meng Zhenyuan's illusions were quickly shattered.

Chang Haonan put one hand on his forehead and replied helplessly:

"How is it possible... This is almost the 21st century. The depth of the mines that have not been discovered by humans until now is conservatively estimated to be more than a thousand meters. This is an electromagnetic wave, not a seismic wave. Even the L-band can only penetrate 20 to 50 meters at most. …”

At this point, Chang Haonan's voice suddenly stopped.

As a decimeter-wave radar with a relatively long wavelength, L-band may indeed have a certain degree of ground penetration capability in theory.

However, in the past, it was generally believed that the penetrating power of electromagnetic waves depended on the composition of the surface covering layer, so it was unstable and the resolution was average. Overall, it was difficult to obtain the desired effect.

The very few ground-penetrating radars that have been put into use are also mainly in the longer P-band, using the stronger penetration of long waves to conduct some rough searches.

For example, looking for shallow underground caves.

But judging from the picture they just obtained.

It is true that the penetrating power of electromagnetic waves is not stable.

But the effect is not necessarily bad.

It is more likely that there were not enough technical means in the past, and a lot of useful feature data was directly blocked as clutter.

Thinking of this, Chang Haonan turned around and looked at the other three people:

“Is there such a possibility?”

He said and pointed to the big screen:

“Even if it's the same topographic feature, there are still differences within it that we don't know about, or that couldn't be observed using remote sensing methods in the past?”

"you mean…"

This sentence is a bit convoluted, but as an expert in remote sensing technology, Li Nianheng quickly understood what Chang Haonan meant:

"For example, deserts can be divided into rock deserts, gravel deserts, deserts and mud deserts. These four landform features are also different in our past remote sensing data. Do you think these four landform features can be further subdivided? "

“That's right.”

Chang Haonan affirmed.

At this time, Meng Zhenyuan next to him also interjected:

“Then we can only ask the comrades from the Exploration Institute to take samples on site and then conduct detailed analysis.”

There was obvious excitement in his tone.

Although he did not find the mine as he just thought, if Chang Haonan's guess is true, then...

Well, I can't think of any practical significance at the moment.

However, at least in the field of geology, the names of the four people present today can definitely be left.

Furthermore, practical significance is often discovered during seemingly useless research processes.

What if?

But Chang Haonan shook his head:

“The areas with abnormal signals on this satellite map are widely distributed, not just in Longyuan. The exploration power of the petroleum system alone may not be enough.”

After speaking, he looked at Li Nianheng.

As the person in charge of the remote sensing mission, the other party will inevitably have to deal with relevant units in the geology profession.

In terms of professional research, they are obviously more professional.

Li Nianheng already understood what he meant without him opening his mouth.

The latter immediately called a staff member from behind:

“Xiao Song, please contact the land and resources department immediately and ask them to coordinate with the comrades from the China Geological Survey Bureau to cooperate with us to conduct on-site exploration at these points.”

“Do it all?”

There are dozens of marked points on the map. The person who was called was a young man who looked like he had just started working. He had obviously never seen such a formation.

Li Nianheng pondered for a while. After calming down, he felt that the movement was a bit too loud, so he chose a compromise plan:

“If the personnel and funds are really limited, we should at least do the research on the Loess Plateau area in the east of Longyuan and the Alxa desert area in the west of Mongolia Province. I think the characteristic signals extracted from these two areas are more complex.”

Complex means a large amount of information.

Since we are all on a trip anyway, we must give priority to places like this.

“In the east of Longyuan, the China Petroleum Exploration and Development Research Institute can send personnel to assist them.”

Chang Haonan finally added.

"yes!"

After the staff member answered simply, he turned around and trotted out of the hall.

“Professor Meng.”

Chang Haonan breathed a long sigh of relief and turned his attention back to the picture displayed on the big screen:

“Our project may not end so soon.”

(End of this chapter)

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