Just like that, a month passed quickly.

This year's Spring Festival, Chang Haonan did not go home again.

Basically, I just run between Xingcheng and Jinling to solve the problem of radar adaptation.

However, for him, as long as the calibration problem can be solved, having one more or one less radar will not actually affect the workload much.

Instead, you can get more application data for iteration.

Especially those radars whose main functions are air defense, the core programs can use the same one.

At most, we can take into account the different bands and adjust the weight coefficients of several typical features.

Of course, at his insistence, the 14th Institute still installed a small switch in the new target recognition algorithm.

It is up to the pilot/operator to choose whether to use it -

Although no negative effects have been found from this new technology in current tests, anyone who has written a program knows that even if there are no problems after testing it 10,000 times, there is no guarantee that there will be no problems in the future.

Although the story of a customer going into a bar and ordering fried rice which ended up with the bar exploding[Note 1] probably didn’t exist in this era, Chang Haonan had heard of it.

The business trip life continued until the end of February.

Just as the media across the country and even most of the world were still paying attention to the series of impacts brought about by China's formal accession to the WTO half a month ago.

2000 2 Month 25 Day.

With almost no one noticing, the first transmission-type remote sensing satellite that belonged entirely to China (Ziyuan-1 was used jointly by my country and Brazil) was sent into space by the Long March 4B carrier rocket at the Jinyang Satellite Launch Center.

After a series of twists and turns, including the loss of satellite signals, on March 3, the first hyperspectral remote sensing data of Longyuan and surrounding areas was transmitted back to the Tanzhou Tracking and Control Station in the northern suburbs of Beijing.

Chang Haonan, Meng Zhenyuan, and several comrades from the National Space Administration have been waiting here for a long time.

"Mr. Luan, Mr. Chang, Professor Meng, this is the first clear image taken by our Resource-01 satellite."

In front of the big screen of the measurement and control center, Li Nianheng, chief engineer of the remote sensing mission, reported to the three people standing next to him.

In addition to Chang Haonan and Meng Zhenyuan, the other person is the director of the National Space Administration, Luan Wenjie.

Of course, since the National Space Administration and the System Engineering Department of the Commission of Science, Technology and Industry for National Defense are two companies with the same team, Chang Haonan and Luan Wenjie can be considered old acquaintances.

It's just that we haven't had much work contact in the past.

“This should be the image after multi-band fusion, right?”

Chang Haonan asked as he looked at a huge black and white grayscale photo on the screen.

Or strictly speaking, it is several overlapping photos.

From the photo, you can vaguely see the mountain ridges, water systems, cities and roads.

In addition, there are some surface features.

These are the data captured by hyperspectral sensors.

Since the pure visible light band has extremely weak penetrating power, we can only see the situation on the outermost layer.

But the benefit is very intuitive.

Mountains are mountains, and water is water.

As the detection band range increases, the amount of information that can be seen also increases.

For example, forests, farmlands, deserts or grasslands under the snow.

These cannot be directly distinguished in the visible light band.

However, large amounts of multidimensional data mixed together will make it impossible for the human eye to distinguish the content in the data map.

Now that the image on the big screen contains clearly visible multiple layers of information, it has obviously undergone some processing.

"That's right. This time we referred to the most advanced technology abroad and adopted the technology of processing while transmitting. In this way, we can get the results as soon as the image transmission is completed."

Li Nianheng replied:

“Otherwise, the hyperspectral telemetry data is a picture-by-picture convergence, and the naked eye cannot see anything.”

In fact, this is the information gap between the two parties.

In principle, Meng Zhenyuan's project will only officially begin after the satellite enters orbit.

It hasn’t even been half a month yet.

Therefore, the space agency's original intention today was to let them visit the measurement and control center, familiarize themselves with the basic situation, and then go back to start the project.

Since it is a tour, it must be something intuitive and understandable.

That’s why I specially posted this picture.

As a result, Chang Haonan came here today ready to get to work directly.

China Petroleum has already sent out an exploration team in advance, and they are just waiting to receive specific exploration sites.

So he obviously didn't want to just watch the fun:

"Then you should have saved the original data?"

"Of course, they are all stored in the server room. I can take you there anytime you need me in the future."

Li Nianheng said this and pointed at his feet.

"call……"

Hearing this answer, Chang Haonan breathed a sigh of relief.

His worst fears did not happen.

If the data processing is done in a satellite computer instead of on the ground, it would be a bit more troublesome.

Because the extraction algorithm of manifold learning is completely different from the existing multi-band fusion algorithm, it is impossible to reuse the data that has been "contaminated" by the latter.

He calmed himself down and said to Li Nianheng:

"Then let's go over now. Our algorithm framework has been built, and we need the original data to extract it."

"it is good……"

Li Nianheng had already received instructions from Luan Wenjie. Without violating principles and involving satellite orbit and attitude control, the entire measurement and control team carried out their work around Chang Haonan.

So he nodded almost subconsciously, and then prepared to take Chang Haonan to the server room.

However, before he could finish saying "OK", his movement of turning around froze.

After a few seconds, he slowly turned his head.

At this time, Luan Wenjie next to him had also turned his gaze to Chang Haonan and Meng Zhenyuan.

"Have you figured out the algorithm...?"

Li Nianheng's brain was working rapidly, but after thinking about it, it seemed that this sentence only had the literal meaning...

but……

Resource No. 15 has only been launched for days.

If we exclude the day when we couldn't find the signal at the beginning.

Only 14 days.

Even our measurement and control center has just received the first complete surveying and mapping results of northwest China.

Then you two are the first ones here and you don’t even know which way the door of the measurement and control center faces.

Just developed the algorithm for extracting and analyzing remote sensing data?

Looking at the two people in front of him with confused eyes, Meng Zhenyuan took a step back calmly.

"It was Professor Chang who did it, not us. It has nothing to do with me..."

Of course, he was just saying this in his mind and couldn't really say it out loud.

"Cough cough..."

Chang Haonan cleared his throat:

"In principle, we can't say that we have figured it out yet."

"It's just that the framework has been built. Next, we need to compare it with the data from on-site exploration, verify the results, and then make some adjustments based on the actual situation."

But Luan Wenjie and Li Nianheng both had an expression that said, "I've read a lot of books, you can't fool me."

These two things can't be compared together, right?

If building the algorithm framework is like building a house, then adjusting parameters and verifying can only be considered as decoration.

Although it is also a necessary process before moving in, its importance and time required are obviously not on the same level as the former.

Now it is equivalent to that my land has just been approved for you, and the building has already been built.

Simply outrageous.

However, despite being shocked, the two still had their sanity.

After calming down a little, he took Chang Haonan and Meng Zhenyuan to the computer room where the original data was stored.

In order to ensure information security, such an unthinkable operation as using a laptop to directly physically connect to the server will definitely not be allowed.

They just copy the data and then you can do whatever you want with it.

Fortunately, the measurement and control center has no shortage of supercomputers, so Chang Haonan doesn’t even have to go back to Beijing Airlines, but can work directly on the spot.

……

Compared with the radar echo data processed in previous tests, the amount of information contained in each hyperspectral data map is more than an order of magnitude greater, so it is impossible to obtain and process it in real time like on the early warning aircraft.

In fact, it took five hours just to complete the first step of local embedded feature extraction.

But the effect is immediate.

"These places... seem to be different from the results of data fusion..."

Li Nianheng came forward with his laptop and compared the pictures on the screen in front of Chang Haonan.

Compared with the picture I saw in the hall before, there is a lot more information.

"It's strange..."

Li Nianheng pushed his glasses on the bridge of his nose:

"Look here."

He said, pointing to a position slightly above the picture.

A plot of land in the northern part of Longyuan, within the territory of Meng Province.

"This place should be the entire Alashan Desert, but the results after processing... let alone comparing it with other deserts, even within this area, the signal characteristics are messy, it feels like there is noise that has not been completely eliminated."

This is not where the West-East Gas Pipeline will pass, but it was captured in the satellite image.

Chang Haonan followed Li Nianheng's instructions.

It really is so.

"Don't worry, we will do regularized matrix decomposition and concept decomposition later."

After looking at it for a while, he decided to give up for the time being:

"This picture is just a semi-finished product at the moment. It is only output for comparison with the finished product later."

"Once all the data extraction is completed tomorrow, it should be clearer."

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