I saw him taking a few steps forward quickly, coming to Mr. Wang's side and holding his left hand vigorously, his eyes a little red:
"Commander-in-Chief!"
Mr. Wang's slightly muddy eyes stayed for a while on 'Xiao Ge''s also somewhat withered face, and with emotion, he sighed slightly:
"Xiao Ge, I haven't seen you for so many years, even you are getting old."
'Xiao Ge' didn't answer when he heard this, but he suddenly tightened his grip on Mr. Wang's hands, and was obviously aroused.
at the same time.
Zhang Dong, Mr. Wang's personal assistant, approached Academician Pan and Xu Yun and introduced them to them in a low voice:
"Academician Pan, Dr. Xu, this is Professor Ge Tongyou from the Xichang Satellite Launch Base, and he was also a member of Mr. Wang's team back then."
"Professor Ge Tongyou's resume is relatively complicated. He served in the Navy in the early years and was mainly responsible for sonar balance issues."
"Later, due to certain situational reasons, the country launched the third-line in-depth construction, and Professor Ge was first transferred to the Jiuquan Satellite Launch Center."
"He assisted in completing the related design of Dongfanghong-1 under Mr. Wang, and many years later was transferred to the Xichang Satellite Launch Base, where he stayed until his retirement."
"Both of you must have heard of Dongfanghong-2, the famous project of the Xichang Launch Base. That satellite had Professor Ge's contribution - he was the project leader and the first person to complete the mechanical racemization method."
After hearing this introduction from Zhang Dong.
Academician Pan and Xu Yun looked at Ge Tongyou with seriousness and reverence.
In the modern history of China.
"Cadres going south" can be described as an important strategic move. Many cadres who went south stayed away from their hometowns for their entire lives.
In fact, not only Ge Tongyou.
Xu Yun’s grandfather was also a cadre who came south from Wendeng, Haidai Province. He met Xu Yun’s grandmother, who was originally from Shaanxi Province, in Shanghai. The two got married in Hangzhou and eventually took root in Fujian. It’s quite interesting to say that
.
The words "going south" and "third-line construction" may seem a bit frivolous, but for many people who have experienced it, these two words cover most of their lives.
However, Ge Tongyou obviously also knew that the current situation was not suitable for a long conversation, so after the greetings were completed, he took the initiative to act as an introducer to Mr. Wang:
"Mr. Wang, this is Political Commissar Dong of the launch base... This is Director Zhang, the chief dispatcher of the command and control hall..."
"This is Manager Huang, who is responsible for the Long March series of external high-throughput communication services..."
With Ge Tongyou’s introduction, the identities of the people present gradually became clear:
The three main leaders of the base, three technical researchers, plus Ge Tongyou and another retired veteran cadre named Guo Rui.
The welcoming lineup was not high-profile, and there was no loud pomp and circumstance, but the respect that should be given was still given.
The nominal purpose of Mr. Wang's visit to the Xichang base was to learn about the current situation of the base and to see old friends, but he did not reveal his intention in the car.
So after the greetings are over.
Led by Li Hua, the current chief designer of the Long March 3 rocket, everyone began to tour around the park.
"Old Wang."
Following Mr. Wang, Li Hua looked a little embarrassed. After all, this was the founder of China Satellite Aerospace:
"Over the years, the layout of our base has remained the same. It is mainly divided into three modules: the launch tower, the command and control hall, and the logistics center. However, a lot of internal equipment has been changed."
"For example, not long ago, the command and control hall just cooperated with the Electronic Information Basic Center of the General Armament Department to upgrade the 'Fuxi' fire control and dispatch system. The error feedback of thousands of signal simulations has dropped by 1.5 orders of magnitude compared with before."
"In addition, the launcher was also maintained and replaced at the end of last year. On the 13th of last month, we launched an APSTAR 6E satellite."
"Of course, the total number of launchers remains unchanged."
Mr. Wang nodded lightly.
Speaking of Xichang Satellite Launch Base, many people should know that it has two launch towers.
But what few people understand is that the numbers of these two launchers are not one and two, but two and three.
The earliest launcher No. 1 has not been completed yet, and its mission is actually quite magical:
It is the launch station designed for the Dawn manned spacecraft.
The Shuguang spacecraft is the famous Project 714, based on the "Gemini" spacecraft across the sea, and was proposed after the Dongfanghong 1 satellite.
Project 714 also selected a group of reserve astronauts from the Air Force, but was eventually canceled due to financial and technical problems.
However, there has always been a rumor among the people that I don’t know where it came from. It is said that 714 was actually successful and sent two people to heaven and they are still alive. There are no news reports because there is no decryption...
What's outrageous is that there are quite a few people who believe it. The question is that top secrets cannot be disclosed easily.
well, let's get back to business.
Today is a rare sunny day in Chengdu. Not only does it not hurt to take a walk outdoors, it is actually a very pleasant thing.
Everyone was walking and chatting like this, and Li Hua introduced Mr. Wang to other facilities in the base.
Almost an hour later.
The group finally arrived at the command center of the Xichang launch base.
The tasks of satellite launch bases these days are very complex. In addition to national launch tasks, most of them are commercial outsourcing.
Especially some small countries in Southeast Asia often outsource launch missions to several bases in China.
Therefore, although there is no national launch mission today, the command center is still quite lively.
From the moment we entered the hall, there were researchers walking around quickly holding documents or talking into communicators. They would also take the initiative to say hello when they met Li Hua and others.
"Mr. Wang, to tell you the truth, when there are no launch missions, the places with the most employees in our park are the command center and power supply station."
[A novel app that has been running stably for many years, comparable to the old version of the source-changing app, huanyuanapp, that is used by all chasing bugs.]
This chapter is not finished yet, please click on the next page to continue reading the exciting content! After arriving in a quiet conference room, Li Hua enthusiastically poured a glass of water for Mr. Wang and said with a smile:
"Of course, during the day, there are many people in the dormitory - after all, we who do scientific research are all night owls."
"Thank you."
Mr. Wang thanked him politely, then glanced at Xu Yun beside him, and slowly said:
"By the way, Xiao Li, I have been away from the front line for some years. I wonder what precision our satellite-borne instruments can achieve for load balance now?"
"Space-borne instrument..."
Li Hua's expression suddenly became solemn, he thought for a moment, and looked at Ge Tongyou beside him:
"Professor Ge, you are an expert in this field, why don't you come and talk to Mr. Wang?"
"no problem."
Ge Tongyou nodded cheerfully, his expression looking quite eager to try:
"Commander-in-Chief, what do you want to know about are the orbiting satellites or the equipment on the space station?"
Mr. Wang thought for a while, pointed to a satellite icon on the conference room projection screen and said:
"There is no need for a space station, let's talk about orbiting satellites."
Ge Tongyou picked up a glass of water from the table, moistened his throat, organized some words, and then continued:
"No problem, Commander-in-Chief, to tell you the truth, if you ask about the space station, I won't be able to tell you many things."
"The current on-board equipment of orbiting satellites seems to have many names, but in fact there are not many major categories. They are basically sensing or imaging equipment - of course, conceptual things like laser weapons are not included.
.”
"The current stability of our country in this regard... is second to none in the world."
As he spoke, he paused and continued:
"We optimized the calculation model of gravitational pull at the beginning of 2022, and the fitting curve parameters reached ."
"For example, the XX imaging satellite launched by a certain model of Long March rocket last year took photos of the same area within 90 minutes. The errors in parameters such as swing amplitude, polarization and swing frequency were all around 50,000 to 60,000."
Hear this.
Xu Yun couldn't help but raise his eyebrows.
His major has nothing to do with artificial satellites, but Zhang Heguang...that is, the good friend of the observatory on the campus of HKUST, has a doctorate in astrophysics.
In addition, the gravity gradiometer itself has a certain intersection with satellites, so Xu Yun had already learned some aviation knowledge a long time ago - as early as when the Diting project team was established.
The description of the process of launching a satellite into space is actually very simple in high school physics books, that is, the launch speed only needs to reach the first cosmic speed.
Then it is usually added that it is also the maximum speed at which the satellite moves in a circle around the earth.
But in fact.
For satellites carrying instruments, orbiting the earth is actually not an easy task.
Because this involves the issue of Lagrangian points.
The so-called Lagrangian point refers to a point where a small object can be stabilized under the gravitational pull of two large objects.
A small object is at a point in space under the gravitational pull of two large objects. At that point, the small object remains basically stationary relative to the two large objects.
There are five Lagrangian points between each star, represented by L1 to L5.
At present, the SOHO satellite is stationed at L1 point in the Earth-Japan system, and L2 point is more lively.
Across the sea, NASA's detectors, the James Webb Space Telescope and our Chang'e 2 satellite have all stationed at the L2 point.
to some extent.
The Lagrange point is the most stable point in the starry sky, so it is also called the cannon sister's chest in space...ahem, the apron in space.
In other words.
There is no problem with the operation of satellites that are not at these five points, but due to the gravitational drag, every time the satellite orbits the earth, the instruments on it will shift a little.
Refined to the aspect of imaging satellites, it is the parameter error of the three parameters of swing, polarization and swing frequency when going around the same area.
At present, the strongest satellite-borne instrument technology in the world is still across the sea. This is not difficult to see from the total number of satellites.
As of January 1 this year, there were 4,582 artificial satellites operating in Earth orbit, including 2,944 satellites across the Gwanghae.
There are 499 Chinese satellites in China and 169 Mao Xiong.
If you include satellites that are not working but have not fallen down, there are currently more than 6,000 artificial satellites in Earth orbit. (Reference from UCS official website, ucsusa./resources/satellite-database)
According to the information Xu Yun learned before.
The domestic parameter error in 2019 was about 1.5 to 2 thousandths, but the imaging width of general imaging satellites is 10 kilometers or more, so this error is almost negligible.
As for the opposite side of the sea, the ratio is 3 to 4 parts per 10,000, which is a relatively obvious advantage.
Woolly bears and rabbits are almost in the same category, also about 1.5 per thousand.
After these three companies, the gaps among other major countries and regions gradually become outrageous.
For example, the error of Neon's aerospace research and development agency JAXA can even be a few percent...
The result was what Xu Yun didn't expect.
Today's Xichang base can actually reduce the error to 50% to 60%?
Mr. Wang has been receiving treatment and recuperation since 20 years ago. He really doesn't know much about this kind of detailed information, so he is also a little surprised at this time.
But soon.
He came back to his senses and waved to Xu Yun on the side:
"Xiao Xu, come here for a moment."
Xu Yun stepped forward obediently.
Then Mr. Wang patted Xu Yun on the shoulder and introduced Ge Tongyou and Li Hua:
"Have Xiao Pan introduced the identities of Xiao Ge, Xiao Li, and Xiao Xu just now?"
Ge Tongyou and Li Hua nodded together.
During their previous visit to the park, Academician Pan introduced Xu Yun's identity to the two of them.
In fact, even if Academician Pan did not take the initiative to introduce him before, Ge Tongyou and others had already recognized Xu Yun's identity - it was less than 20 hours before the press conference ended.
This chapter is not finished yet, please click on the next page to continue reading the exciting content! Xu Yun’s performance at the press conference was extremely eye-catching. Now it is said that someone on the Internet has formed a fan support group called "ijiu", Ge Tongyou
It is impossible not to know Xu Yun.
But on the other hand.
Ge Tongyou and others only knew that Xu Yun was a top student in physics and biology, but did not know much about other aspects.
At first Ge Tongyou thought Xu Yun was just a transparent person carrying a bag, but now it seems...
Doesn't that seem to be the case?
At this moment, Mr. Wang spoke again:
"Xiao Ge, you may not know it well, but Xiao Xu has a topic on his hands right now...or a project, and the content is related to the Pangu particles at the press conference."
"However, when this project was first established, it was not to study dark matter, but to extend the survival time of Pangea particles so that they could be used in gravity gradiometers."
Ge Tongyou was stunned:
"Gradiometer?"
Seeing that Mr. Wang was having difficulty speaking at this time, Xu Yun beside him took the initiative to take over the conversation and said to Ge Tongyou:
"That's right, Professor Ge, I learned something from a certain channel this morning..."
Xu Yun briefly introduced the excavation of Yongling to Ge Tongyou, and reiterated the story of the Dingling tragedy, so that everyone gradually had a preliminary understanding of the general situation.
After listening to Xu Yun's introduction quietly, Ge Tongyou looked thoughtful:
"So Dr. Xu, your idea is... to let the Xichang base solve the problem of carrier platform balance for you?"
Xu Yun nodded and continued:
"Yes, Professor Ge, due to limited conditions, the full version of the gravity gradiometer, which can cruise over the Chinese territory for a long time, will definitely not be able to land for a while."
"But the area of Yongling is only 0.25 square kilometers, and many mass production issues do not need to be considered - to put it bluntly, in terms of hardware, we can pile up a set of 'trial equipment'."
"But the hardware is easy to solve, but there is nothing we can do in terms of technology, so we can only use Mr. Wang's car to come to our base to ask for help..."
Although Xu Yun didn't know that Mr. Wang had built a bridge for him until he set off, in this case it was obvious that he couldn't be said to have been dragged here by Mr. Wang, but that he was kind enough to help.
But what surprised Xu Yun was.
After hearing what he said.
Ge Tongyou, Li Hua and another project team leader all had subtle expressions on their faces.
Then Ge Tongyou thought for a moment and winked at Li Hua.
Li Hua made an apologetic expression to everyone, quickly walked to a corner and rummaged around a few times.
One minute later.
He returned to everyone with a document bag sealed in kraft paper, and handed the document bag to Xu Yun:
"Dr. Xu, look at this."
Xu Yun blinked when he saw this and took the document bag curiously.
The document bag was sealed with a thin thread. Xu Yun gently turned the thread and quickly opened the document bag.
Then he reached into it and slowly pulled out a fax document.
I saw a line at the beginning of the document:
"Letter of Intent for Collaboration on the Design of Partial Assemblies of Gravity Gradiometer"