Super Weapon Swap System

Communication satellite is a special satellite, which is used to transmit signals. Communication satellite is one of the earliest and most widely used satellites in the world.

As a radio communication relay station. Communication satellite is like an international Messenger, collecting all kinds of "letters" from the ground, and then "delivering" them to users in another place.

If the satellite can not move relative to the ground, it will greatly simplify the use of ground users. Therefore, most satellites are geosynchronous satellites.

At an altitude of 36000 kilometers, its coverage is particularly large. One satellite can be responsible for one-third of the communication on the earth's surface. If three communication satellites are evenly placed in the geostationary orbit, global communication beyond the South and north poles can be realized.

When the satellite receives the weak radio signal sent from one ground station, it will automatically turn it into a high-power signal, and then send it to another ground station, or send it to another communication satellite, and then send it to the ground station on the other side of the earth. In this way, we will receive the signal sent from far away.

However, the technical difficulty of launching synchronous satellites is quite great. Up to now, Han has no qualified communication satellites, so Han must rent satellites from other countries when needed.

This launch is also imperative.

At present, the launch of satellites is in full swing in China.

Yuecheng satellite launch center, a newly-built satellite launch site in the Han Dynasty, is its first launch this time.

Compared with the previous launch site, it has low latitude, high altitude, good launch inclination and short ground to air distance.

The lower the latitude, the closer it is to the equator, which can not only make full use of the centrifugal force of the earth's rotation, but also shorten the distance from the ground to the satellite orbit, thus increasing the payload of the rocket.

At the same time, the canyon here has good terrain and solid geological structure, which is conducive to the overall layout of the launch site.

In terms of climate, there are many sunny days, which is one of the regions with the smallest climate change in China. The sunshine is up to 320 days, there is almost no fog, and there are more test cycles and allowable launch time.

In short, it has low latitude, high altitude, less clouds, no pollution and high air transparency. Now, a modern high-tech satellite launch center has been established. At the same time, it is the only space base to launch geosynchronous satellites.

It can be said that the space base here was established to better launch geosynchronous satellites. At the same time, Qin Guan also proposed.

In terms of aerospace, we should also take the road of opening to the outside world and undertake satellite launch tasks. Aerospace engineering can also be effective.

Aerospace has always been associated with the military. The former satellite launch base has too many military secrets. After the establishment of the space base here, it will be opened to the outside world and undertake foreign satellite launch missions.

Now, on the launch pad outside, a rocket has stood up.

At present, the main carrier rocket launched in China is long March 2, which was developed on the basis of Dongfeng 5. Now long March 3 is a three-stage rocket developed on the basis of Long March 2.

In short, its first and second stage engines adopt the first and second stage engines of Long March 2C. The third stage is independently developed, and the world's most advanced liquid hydrogen / liquid oxygen engine is adopted. The rocket has a total length of 44.86 meters and the maximum diameter of the core stage is 3.35 meters. It can directly send a 1600 kg payload into the geosynchronous transfer orbit.

Now, it's its first test flight.

Time passed slowly. When the night came, it finally entered the countdown. There was silence in the launch hall. With the launch order, a hot flame burst out at the bottom of the rocket. The whole rocket began to climb slowly, left the launch pad and disappeared in everyone's sight.

The successful launch has nothing to do with the satellite launch base. What is needed now is measurement and control.

The whole measurement and control task is carried out by Ho Jing, where there is a special satellite measurement and control field.

Although we can't see the magnificent launch scene or the magnificent and lively landscape, thousands of instructions and massive data information from all directions intersect and run silently. Here is not only full of excitement and excitement, but also hidden tension and anxiety.

In the past, the TT & C center was mainly used to measure and control returnable satellites. To successfully bring the satellite back to the ground, it was inseparable from the TT & C center.

Now, their task is also very important to enable satellites to enter orbit accurately.

Since the first man-made satellite of China was launched in 1970, the center has been responsible for all the tasks of tracking and observation, telemetry and remote control, operation management, information exchange, data processing and attitude control. In the mission of the recoverable satellite, with valuable professionalism and superb measurement and control technology, the recovery success rate of the recoverable satellite has reached 100%.

Now, they must not fail!

At this time, on the ocean, three marine survey ships are also working at full strength. Yuanwang-1's antenna is aimed at the space overhead to capture the incoming satellite at any time.

The 10000 ton measuring ship opened its fin stabilizer, and the antenna on the top remained motionless, capturing satellites in space.

As long as you have studied the knowledge of man-made satellites, you will know that there are three orbits, a near earth circular orbit, a large elliptical orbit and a large circular orbit of synchronous satellites.

At this time, Qin Guan came to yuanwang-1. He listened to people on the side introduce the launch knowledge of synchronous satellite.

I was familiar with it last time. Colonel Chen was in charge of the whole measurement and control project. At this time, the satellite just flew overhead. "The attitude is normal and is still in large elliptical orbit," Colonel Chen said. "The most important step for us to launch a synchronous satellite is to ignite in the air."

Through continuous fighting day and night, the measurement and control system has accurately measured the satellite in the sky. At the same time, through thousands of instructions sent to the satellite, it has repeatedly controlled and adjusted the satellite orbit, satellite attitude and satellite speed, so as to adjust the satellite to an optimal attitude waiting for ignition according to human will.

The satellite is already in an elliptical orbit, which is also called a transfer orbit. In this orbit, it must be ignited again.

The apogee is 36000 and has reached the synchronous orbit, but the perigee is only a few thousand kilometers. You must light a fire at the apogee in order to enter the great circle orbit.

This ignition is a great risk. If the "ignition" command on the ground cannot be issued, or the engine on the satellite does not ignite after the command is issued, the satellite will not be able to reach the 36000 km high quasi synchronous orbit, but can only continue to "wander" in the large elliptical orbit until it falls and crashes.

In the launch of geosynchronous satellites, many satellites have finally failed in this step.

"Who will send this instruction?" Qin Guan asked.

"It's Yuanwang one," Colonel Chen said.