Chapter 864 Believe me, our satellite is for civilian use!

Of course, Chang Haonan didn't have to write the patent himself.

Anyway, he had already sorted out the most core calculation process.

As for other parts that need to be discussed, most of them are clichés and can be completely handed over to the students who are new to the research group to complete.

Wang Jie, who has not yet left for Shanghai, is a suitable candidate.

After all, writing patents is a specialty of the graduate school stage and one has to savor it.

As for Chang Haonan himself...

After deploying the tasks, he set off for the Science and Technology Commission.

Since he had promised Zhuang Bingchang to secure a spot for his seed, he would certainly not go back on his word.

……

Before leaving, Chang Haonan made a special phone call to confirm whether Ding Gaoheng was in the office.

Although he still had the authority to enter by facial recognition, he hadn't been to the Commission of Science, Technology and Industry for National Defense for several months.

The last time I met Ding Gaoheng was after I had just published the paper proving the Poincare conjecture, and he invited me to his home for dinner.

This time, I even felt like I was revisiting an old place.

"Director Ding."

Chang Haonan came to the door of Ding Gaoheng's office, habitually prepared to knock on the already open door, and then walked straight in.

But as soon as he finished speaking and before he could raise his hand, he saw another person sitting in the room.

So he stopped.

When there are outsiders around, you should still behave more formally.

Ding Gaoheng, who was talking to the man on the sofa, heard a knock on the door. He turned around and saw Chang Haonan standing at the door.

"Xiao Chang, come in and sit down."

When the other person heard Ding Gaoheng address Chang Haonan, he immediately turned around and looked over.

They are still acquaintances.

"Director Luan?"

A flash of surprise flashed across Chang Haonan's eyes.

But then he stepped forward and shook hands with the other party:

"haven't seen you for a long time."

After saying that, he sat on another sofa next to him.

Luan Wenjie, Director of the National Space Administration.

This is really too much of a coincidence -

Although Chang Haonan had called Ding Gaoheng just now, he did not explain his specific purpose in the call.

Nominally speaking, the commander-in-chief of the manned space program is the director of the Commission of Science, Technology and Industry for National Defense, that is, Ding Gaoheng.

But this is mainly to facilitate the coordination of the forces of the entire military-industrial system, and the nominal component is relatively large.

Therefore, in order to get a breeding opportunity for Zhuang Bingchang, it will ultimately depend on Luan Wenjie.

It turned out that the real owner was there.

However, Chang Haonan did not speak immediately after he sat down.

We are all colleagues under the same system. Now we don’t fight over houses or land. The first come first served principle still needs to be followed.

However, although Chang Haonan did not interrupt the topic, Luan Wenjie took the initiative to look at him.

"Boss Chang, Director Ding and I just mentioned you."

"Oh?"

Chang Haonan, who was originally planning to stare blankly for a while, suddenly became interested.

It's impossible that the two people opposite can predict the future, right?

"Mr. Chang, you should know that our country has launched a total of three resource-series remote sensing satellites independently and in cooperation with Brazil."

Luan Wenjie did not use a questioning tone, so Chang Haonan just nodded slightly.

Of course he knew this. After all, the satellite image that led to a series of subsequent topics and projects came from the Resource-01 satellite.

The former immediately continued:

"In recent years, especially in the six months since the launch of the two Ziyuan-2 satellites, space-based remote sensing has helped us solve many problems that were not easy to overcome in the past. Of course, we also owe a lot to Mr. Chang."

When we talk about Chang Haonan, we are naturally referring to the high-dimensional data dimensionality reduction algorithm he developed.

However, Chang Haonan himself was a little confused.

"Wait a moment, Chief Luan."

He raised his hand to interrupt the other party:

"I have just started studying the data obtained through data dimensionality reduction. Can you still use my knowledge to your advantage?"

Chang Haonan had indeed used that algorithm to process different data several times, but no further results had been produced, whether it was the desert soilification he himself was in charge of, or the permafrost and Loess Plateau geological analysis previously handed over to other systems for research.

How did it “solve many problems”?

I haven't exerted my strength yet?

But the way Chang Haonan looked at Luan Wenjie, it was obvious that he was not joking.

Luan Wenjie and Ding Gaoheng, who were interrupted, looked at each other and explained with a smile:

"The data that has been reduced from too high a dimension still needs to be analyzed by you, Mr. Chang. However, after reducing the dimension of some relatively low-dimensional data, we can still dig out a lot of useful content by increasing the sampling density and comparing it with known geographic information."

"For example, in July this year, we relied on these data to predict a large-scale mountain torrent and mudslide in Ziyang County, Qin Province, and evacuated residents of 7 towns in advance, avoiding at least hundreds of casualties..."

Chang Haonan suddenly realized.

High-dimensional data is just a general term.

Just as Luan Wenjie said, it can still be divided into different levels internally.

After dimensionality reduction, the low-dimensional data appears in different forms.

The only thing they have in common is that, because they are all converted into two- or three-dimensional data, they can all be directly recognized by human perception.

Of course, just because two or three-dimensional data can be read does not mean it can be easily understood.

That is why it is necessary to carry out the data verification mentioned earlier.

Since Chang Haonan is the developer of the algorithm and he is using cheats, his focus is naturally on data with higher original dimensions.

The amount of information hidden behind these data is greater, but correspondingly, it is also more difficult to analyze.

But the route chosen by the space agency is the normal one of starting with the easy and then moving on to the difficult.

So it is normal to come up with some results quickly.

In particular, the geological disaster risks of flash floods have relatively obvious characteristics.

If there is an earthquake, it might be more troublesome.

At least the algorithm he has currently developed certainly cannot handle it.

And Chang Haonan was naturally happy to see this.

After all, the route he set for himself when he was reborn was not just to be a Doraemon who produced finished products, but to drive the development of related industries in China.

He has achieved this goal in the fields of aviation and mechanics.

In the field of aerospace, this is at least a good start.

While Chang Haonan was thinking secretly, Luan Wenjie picked up the tea on the table and took a sip, then returned to the previous topic:

"In short, through the application of this period, the superior unit has also intuitively realized the role and urgency of building a space-based remote sensing system, so it has approved a new sum of funds for us."

"Want to launch other remote sensing satellites?"

Chang Haonan now understood what the other party meant.

"Yes, but this time it's not the resource series."

Luan Wenjie replied:

"According to the original plan, we were going to launch my country's first ocean resources satellite, Ocean No. 2002A, between 2003 and to provide services such as marine biological resource development, marine pollution monitoring and marine scientific research to the Ministry of Land and Resources and the State Oceanic Administration."

"But now that we have this funding, we are ready to speed up the progress and strive to advance the launch mission to the first half of next year, or no later than the third quarter of next year."

"So...what do you need me to do?"

Chang Haonan asked directly.

After hearing this, Luan Wenjie stopped talking about other things:

"The current resource series satellites use the onboard data system to transmit the raw data, and then our ground stations process the data to get the results. The advantage of this is that the requirements for the satellites are relatively low, but data can only be exchanged when the satellite passes overhead, so the timeliness is very poor."

"Of course, the resource series satellites mainly serve within our territory, so this is not a big problem. However, the ocean series satellites are mainly aimed at the Pacific region. If we use the old method again, it may not meet the requirements."

"So, we hope to be able to hand over at least part of the data processing to the onboard computer, which can greatly alleviate the transmission pressure..."

Hearing what the other party said, Chang Haonan immediately curled his lips:

"Director Luan, the development of marine biological resources, marine pollution monitoring, and marine scientific research... don't seem to require timeliness, right?"

He thought to himself that if Ocean No. 1 only had this function, he would dare to eat the satellite.

Sure enough, after hearing his question, Ding Gaoheng, who had been sitting behind his desk without speaking, smiled and said to Luan Wenjie:

"I told you that you can't fool him..."

Then, he looked at Chang Haonan and explained:

"In recent years, we have developed an active radar system for large and medium-sized surface targets based on the technology of the Soviet Union's 'Legend' ocean surveillance system. In addition to the tasks that Comrade Wenjie just mentioned, Ocean No. 1 is also responsible for testing the effectiveness of this radar."

Chang Haonan's eyes widened slightly.

He had indeed guessed that this satellite must have military uses, otherwise there would be no need to pursue front-end data processing and timeliness.

But playing such a big game was still completely unexpected:

"As I recall, the Legendary System needs to be powered by a satellite-borne nuclear battery. Our Ocean One..."

"Of course not."

Luan Wenjie shook his head:

"The safety of nuclear batteries is too scary. Fortunately, our radar equipment consumes relatively little power, and we have cancelled a data link system for direct communication between satellites and fleets, so solar panels are enough to serve us..."

"So that's it..."

Chang Haonan hasn't completely recovered from the shock just now——

The "Legend" ocean surveillance system was the core of the Red Navy's anti-aircraft carrier system in the 80s. It includes the active US-A and the passive US-P. It can locate the target individually based on the baseline interferometric phase comparison method, or it can use dual satellites to perform active and passive composite positioning.

Although the positioning accuracy is relatively average, only hundreds of meters or even kilometers under different conditions, anti-ship missiles with active radar seekers do not require particularly precise target information.

It seems that in recent years, China has exchanged a lot of things from the north that it didn’t get in the previous life.

If the ocean surveillance system could be built more than ten years in advance, it would definitely be a huge threat to the US military, which relies heavily on the naval fleet for physical deterrence.

Combined with the anti-ship ballistic missiles he had considered before...

Isn't this the trump card weapon?