In the world, there are few countries that can launch satellites, and even fewer countries that can launch synchronous satellites. Before Han, it was necessary to rent synchronous satellites from other countries for communication. This is quite detrimental to national defense security.

For example, the connection between submarines and shores has mainly relied on long-wave radio stations for a long time. This kind of long waves can propagate against the surface of the earth and reach long distances. However, the speed of this propagation is very low. A few words of order will take a few minutes.

The longer the wavelength, the less information carried on the carrier. In contrast, looking at the microwave, the data carrying capacity is quite large.

Therefore, the long-wave method is gradually gone. Submarines use more satellites for communication. If you continue to rent foreign satellites, it will obviously be detrimental to the submarine. Who knows if they are listening?

Therefore, it is inevitable to develop communication satellites in China.

Now, this satellite is being launched.

Ordinary satellites are enough to be launched, but the current synchronous satellites need to be launched for several days.

Now, the satellite has entered the final circle of the large elliptical transfer orbit. According to various data, it has the best ignition conditions for the second ignition in the air.

Ho Kyung’s satellite measurement and control center is very nervous. Everyone is staring at the curve on the big screen. There is an actual curve and a theoretical curve. Only when these two curves are combined can success.

"Attention, now the countdown to ignition!" A voice sounded in the lobby of the measurement and control center.

This sound spread to the sea simultaneously, and people were also very nervous on the Yuanwang-1 survey ship.

Colonel Chen stood in the cabin, looking at the front row of operators, Qin Guan could also feel the tension beside Colonel Chen.

"Countdown!"

The countdown was once a product of science fiction. Before humans entered space, there was such a countdown in science fiction novels. Later, scientists thought it was good and used it in space.

When the countdown reached zero, the operator pressed the button, and through the huge antenna of Yuanwang-1, waves of electromagnetic waves were shot into space.

At this time, the satellite just passed the head of Yuanwang-2.

A series of data was injected into the satellite, and the engine immediately ignited at the tail of the Dongfanghong 2 satellite!

The liquid hydrogen liquid oxygen engine emits hot flames, pushing the satellite to accelerate in the dark space.

If it does not accelerate, it will start to follow the curve and fall towards the perigee! And now, its height has not dropped!

On the Yuanwang-1 survey ship, the radar monitors the movement of the satellite, and a series of monitoring data are converted by the computer and appear on the terminal.

On the screen, the curve marking the inclination of the satellite fell rapidly, while the apogee height mark jumped straight up.

"The satellite ignited successfully!"

"The satellite has entered a quasi-synchronous orbit."

When they heard the news, everyone cheered.

Qin Guan frowned, "What is a quasi-synchronous orbit?"

According to Qin Guan's vision, once the engine is turned on and the satellite is pushed up, isn't it already in orbit?

Hearing Qin Guan’s question, Colonel Chen on the side explained: “Mr. Qin, we still have a lot of tasks, and the work is far from over. The current quasi-synchronous orbit means that we have become a synchronous satellite, but , Our satellite has not reached the designated position, it is as if we have reached a certain village, and now we are going to a certain household."

Only then did Qin Guan understand that there are still many things left!

Launching a geostationary satellite is definitely not easy.

"Specifically, our current satellite is still in a horizontal state. We have to make the satellite stand up. This requires sending a series of commands. At the same time, we have to establish a drifting speed for the satellite so that the satellite can move towards the final fixed point. The area slowly drifted."

"When the satellite drifts to a predetermined area, will it stop?" Qin Guan asked.

Colonel Chen nodded: "Yes, President Qin, your thinking is very sharp. We will send the brake command to the satellite through the remote control system to fix the satellite over the equator at a height of 36,000 kilometers. The satellite is in space. The drift process takes one week to half a month. During this period, the satellite needs to be telemetered and monitored every day to prevent it from slipping out of the prescribed circle. It can only drift about five or six degrees a day."

After finishing speaking, Colonel Chen made an analogy: "It's like driving a cart. If the animal is not obedient, then use a whip to shake it a few times, ready to use it at any time. The whip is constantly shaking to make it honest."

Qin nodded his opinion: "That must be our survey ship in Pingyang. For us, we can actually just follow it. It's all for our additional mission this time."

When he heard Qin Guan say this, Colonel Chen finally gave a thumbs up, saying that Qin is always an all-rounder and knows everything. Sure enough, there is nothing to hide from President Qin.

In order to monitor satellites, there are survey ships in the three oceans, but when the satellite has entered a quasi-synchronous orbit, it is actually over the peaceful ocean. At this time, as long as one survey ship is enough, they are separated by half of the earth. It is absolutely invisible, here, just to cover the navy's inspection.

With a smile on Qin Guan's face, he knew everything well, and he gained a lot from launching the satellite this time.

To achieve global communication, at least three satellites are needed, so in the future, we will definitely launch satellites in other locations.

These days, waiting for Silver Country to continue to hold back big moves.

Qin Guan stayed on the survey ship for another day, was about to return to the destroyer, and came to the cabin of the survey and control ship again, but found that everyone was very anxious and seemed to be discussing something.

"What happened?" Qin Guan couldn't help asking.

"The measurement and control task of our satellite has already been completed. It had nothing to do with us, but now that something has happened to the satellite, we should work together," Colonel Chen said.

Sure enough, something happened to the satellite?

With a wry smile on his face, Colonel Chen said, "Our satellite suddenly got a fever."

Have a fever?

The outer space is cold. When it is out of the atmosphere, the outer space is almost on the order of absolute zero. Only when the sun is irradiated, the temperature on the satellite will slightly increase.

Therefore, on artificial satellites, there is no need to worry about how to dissipate heat. What needs to be worried about is how to keep warm.

The current satellite suddenly got a fever!

The so-called satellite "fever" means that the battery on the satellite suddenly heats up, causing the temperature of the satellite to rise.

Originally, according to the design requirements, the battery temperature on the satellite should not exceed 30 degrees, but now, in less than half an hour, the battery on the satellite has a "high fever" to 60 degrees!