Chapter 271: The Satellite with the Clearest Images in History
It is said among the people that the resolution of the US military satellites has reached 1mm.
It's so exaggerated that even the number of ants on the ground can be counted.
It is only because of confidentiality reasons that the images taken by these satellites have not been leaked.
Of course, such a statement is obviously false.
According to the laws of physics, it can be calculated that under current conditions, the diffraction-limited resolution of satellites in low-Earth orbit is only within a few centimeters.
Not to mention, it will also be affected by many other adverse factors such as atmospheric problems.
Only by using lens assembly or lens folding technology can a breakthrough in the diffraction limit be achieved .
The news that US satellites can clearly see the words on newspapers on the ground is completely alarmist.
As for those pictures with higher resolution and clearer pictures, they are all taken by drones, not satellites.
Xu You continued to explain the error calculation formula he established in the algorithm and explained the reasons behind it.
"The error here is the sum of the predicted coordinate error, predicted category error, and predicted confidence error. Based on the satellite's training on target detection, we can let the satellite further deeply learn the processing of the target detection algorithm and continuously optimize the satellite's imagery."
By comparing simulated satellite images, we can intuitively see the difference in clarity between the two generations of satellite images.
In fact, it is difficult to tell from these two pictures that these are photos taken by two satellites of almost the same specifications.
Of course, one of them was a photo simulated by Xu You’s algorithm and model.
As for whether the satellite can really capture such high-definition images after launch, no one can be sure now.
After listening to Xu You's explanation, Wu Jing said:
"I think the launch of the next Gaofen satellite can enter the preparation stage. Our backup satellite can come in handy."
Normally, during the development process of each satellite, an identical backup satellite is prepared.
Suppose, for example, that the launch of the first satellite failed due to unexpected circumstances.
In that case, the spare satellite can immediately take over and complete the mission of the previous satellite.
If the first satellite is successfully launched, the backup satellite may be used for other purposes or simply not used anymore.
This time, since Xu You optimized the satellite's image detection algorithm, he could maximize the use of this backup satellite.
After that, the China Space Administration formulated the launch plan based on the situation.
There is still some time before the launch, so Xu You and Wu Jing do not need to participate in the subsequent testing work.
Xu You and Wu Jing can finally go home together to see their relatives.
"Teacher Wu, can I change my words now?"
After coming out of the Fifth Academy of Aerospace, Xu You couldn't help but ask.
"Of course, Youyou."
Wu Jing could no longer hold back and called Xu You by his nickname.
No matter how old Xu You is or how many extraordinary achievements he has made, in Wu Jing's heart, Xu You will always be her child.
"mom!"
At this moment, Xu You could finally forget about his scientific research for a short while and return to his life.
After Xu You and Wu Jing returned to Shengcheng, they visited various relatives to make up for the regret of not going home for the New Year.
This year, the loneliest person was Xu Zhou.
In the past, only Wu Jing was not at home for the New Year, but this time, even Xu You was not coming back.
But Xu Zhou still understood very well how difficult it was for this mother and daughter.
As the person with the lowest status in the family, Xu Zhou had no choice but to endure it all silently.
As the satellite launch date approached, Wu Jing and Xu You went to the satellite launch site together.
Wu Jing and Xu You both witnessed the successful launch of the satellite with their own eyes.
This time, the satellite launch site is still at the Suzhou Satellite Launch Center.
With the previous experience, Xu You is already very familiar with this place.
However, because Xu You was involved in the design of this satellite, it is confidential information.
Xu You did not deliberately greet his comrades with whom he had fought side by side, but merely acted as a bystander.
On the launch day, Wu Jing and Xu You arrived near the launch site together.
Fifteen minutes before launch, all staff had evacuated from the tower.
Wu Jing and Xu You also stood in a safe area farther away, waiting for the rocket to launch.
This time the rocket launch was still broadcast live on CCTV.
However, the information revealed did not particularly emphasize how special this satellite was.
It is only represented by a simple and plain code name, "Gaofen 14-02".
Because it is just a backup satellite of Gaofen-14.
Such news did not attract special attention from the public, and only a few space enthusiasts watched the live broadcast of the rocket launch on TV.
As someone who has personally participated in this project.
Wu Jing and Xu You both knew the significance of this satellite.
If everything goes well, this will be the satellite with the highest resolution and the clearest images in human history.
There will no longer be any secrets in the areas it can capture.
Just before the rocket launch, all preparations have been completed.
"Countdown - one minute, get ready!"
As the countdown progressed, everyone became more nervous.
"Five, four, three, two, one, fire!"
At the command of the commander-in-chief, there was a loud bang and a strong flame burst out from the tail of the rocket.
"Rocket—take off!"
At this moment, Xu You witnessed the rocket launch for the first time.
Xu You still remembers the last time, when he was at the Suzhou Satellite Launch Center, just watching the test run process was enough to shock Xu You.
This time's rocket launch made Xu You feel even more excited.
After the rocket is ignited, the powerful thrust makes the rocket rise straight up into the sky.
"Procedure turn!"
"The position telemetry signal is normal!"
"160 position tracking is normal!"
"312 radar tracking is normal!"
"The cabin is flying normally!"
Each signal indicates that the rocket is operating normally and according to ideal conditions.
All signals indicated that the rocket launch was very successful.
But Xu You, Wu Jing, and all the staff at the launch center.
Their mood was still tense.
Because, there are two key nodes later.
Only by successfully passing these two key nodes can the success of the rocket launch be completely announced.
The first node is the separation of the satellite and the rocket.
After the carrier rocket reaches the predetermined altitude and speed and adjusts its attitude, the satellite will separate from the rocket at a certain relative speed.
