Can the satellite be retrieved after it is sent?

The satellite is generally referred to as the cabin on the satellite, which is completed by the remote control of the ground center control station. When the artificial satellite runs to the lowest point of the orbit, the ground crew ignites the bolt connecting the satellite and the module through the remote control device. After the bolt was blown off, the satellite separated from the ** module.

Immediately after that, the ground station sent a signal to start the thrust reverser rocket, forcing the operation speed of the ** module to gradually slow down, and finally deorbit and re-enter the atmosphere.

At this time, the speed of the ** cabin is about 25 times the speed of sound on the ground, or even higher. When the speed and altitude change sharply, it is impossible for a person to control the ** cabin through the guidance system. Therefore, whether the ** module can be guaranteed to fall into the predetermined area depends almost entirely on the calculation of its re-entry orbit.

When descending to a low altitude below 2000 meters, the ** cabin will automatically abandon the protective cover, open the drag parachute and parachute, and then slowly descend.

At present, satellites are mainly used in the form of sea and land, and there are also aircraft in the air. When the ** cabin slowly lands, the boats, vehicles or planes participating in the ** work are patrolling the predetermined area. The ground station constantly informs the patrol officers of the location of the ** cabin.

** As soon as the capsule lands, a signal is also sent out to allow people to find it as soon as possible.

Yes, because he was going back.

Can a satellite fly back after a successful launch? Generally speaking, the satellite will not be carried out after a successful launch. Because the cost of ** is very huge.

For satellites, there will only be attitude adjustments, that is, minor adjustments to the orientation and orbit of the satellite. But it doesn't take the satellite down from such a high altitude. There are also satellites that can be **, that is, after the satellite is launched, it will be.

Within a certain period of time, it will wake up and fly back to the ground, but this process requires the coordination and participation of humans and satellites. <>

First of all, let's talk about the non-recoverable condition of the satellite. Satellites that are generally not retractable can only have the ability to make attitude adjustments. That is, the satellite can change the orientation of the satellite camera.

It can also be said that the satellite adjusts the content of the ground scan record accordingly. Satellites can also make orbit adjustments, but the amplitude is not particularly large, and only fine-tuning. Through the gravitational formula, we can analyze that the orbit adjustment of the satellite also requires manual participation.

Because it involves a lot of physical principles, it needs to be done together to achieve the best state. When the satellite reaches the end of its useful life, the satellite can become a piece of space junk, so these obsolete satellites may become an obstacle to the aircraft when people are exploring outer space. Therefore, the issue of space junk has also attracted great attention in the international community, and this topic is currently being hotly discussed.

Secondly, let's talk about the satellites that can be **. But the satellites are like our spacecraft and can be launched and returned to the ground. But such satellites need to be equipped with certain thrust reversers.

It is calculated by the gravitational force formula, and when it continuously changes its orbit and lowers its orbit into the atmosphere, the thrust reverser is used to achieve the deceleration effect. At the same time, the thermal insulation of the outer surface of the satellite makes it less susceptible to scorching the interior by extremely high temperatures. The ground side will also have a certain degree of control over the satellite, and finding a reasonable landing site is also one of the tasks on the ground.

Therefore, the ** of the satellite needs to be completed by the ground and the satellite together in order to make the satellite safe**.

Satellites are a very key technology in the field of aviation. Each country has invested a lot of human and material resources in this area. Because in the future in the field of aviation will become an absolute factor in determining the military power of the country.

Under normal circumstances, after the satellite is successfully launched, it will not be carried out, because the cost is huge. There are also satellites that will fly back to the ground within a certain period of time after launch, which requires manual and satellite coordination to do.

No. Satellites are launched into space to work, and when they run out of energy, they float in space for a few years, and finally stay in space forever.

No, it won't. Because after the launch, he has already entered his corresponding orbit. If the laws of the universe do not change, he will definitely not fly back.

Summary. In the design, due to cost and technical considerations, general satellites do not have the function of returning. Even if there is a return function, it is only a part of the satellite (usually called the return capsule), considering the loss caused by high temperature caused by friction with the atmosphere, the general unprotected satellite or part of the satellite can not be directly returned to the ground**.

Can I come back after the launch of the artificial satellite, and if so, what is the principle?

Due to cost and technical considerations, general satellites do not have the function of returning. Even if there is a return limb clear energy, it is only a part of the satellite (usually called the return capsule), considering the loss caused by the high temperature delay caused by friction with the atmosphere, the general unprotected satellite or part of the satellite can not be directly returned to the ground**.

If you are satisfied with me, please give it a thumbs up.

In order for a satellite to return at a predetermined time and place, several basic conditions must be met. For example, the carrier rocket is required to have high navigation accuracy, and can accurately send the satellite to the predetermined orbit of the dry cherry blossom, so that the last lap of the satellite flight will pass over the predetermined area; Even if the satellite enters the predetermined orbit, since the ** satellite is generally a low-orbit satellite, it is subject to atmospheric drag and the shape of the earth.

Therefore, the actual orbit of the satellite must be accurately measured in order to determine the time, minutes and seconds to send a return command to the satellite; The ground and the satellite are required to cooperate with each other, so that the satellite can accurately transform into a return attitude, which is the key to whether it can return; It is required that the various instruments and equipment that carry out the return mission work accurately and without the slightest error. The return voyage of a satellite is arduous and has to endure many harsh environmental conditions. First of all, because the satellites have to be completed in a few minutes.

A range of 1,000 kilometers and entry into the dense atmosphere at a speed of almost 8 kilometers per second.

Strong aerodynamic drag and thrust reverser rocket ignition and extinguishing will produce violent shock, vibration and overload, and the structure and equipment of the satellite must be strong and not damaged; Secondly, the satellite travels through the atmosphere at a speed of more than 20 times the speed of sound, and the surrounding air is subjected to intense compression and friction, the temperature is as high as 8,000 10,000, and the surface of the satellite is also several thousand degrees Celsius.

Therefore, the surface of the satellite must have a good ablation and heat-resistant layer, otherwise, the entire satellite will be burned to ashes; When the satellite approaches the ground, there is still a speed of several hundred meters per second, parachute.

The deceleration device must be absolutely reliable, otherwise, the satellite will be smashed when it lands, and the signaling device must also be reliable so that it can be easily detected.

The main procedures of the satellite are: the first step is to accurately calculate the flight orbit of the satellite and determine the time to start the program; In the second step, the ground remote control station issues a return command, and the satellite adjusts its attitude. The attitude is incorrect, it is impossible to return to the predetermined place, or even fly high in the air; The third step is to throw away the excess cabins; In the fourth step, the thrust reverser rocket is ignited, and the satellite enters the return orbit; The fifth step is to draw and open the parachute at a certain altitude to further slow down the satellite; The sixth step is to recover the satellite with aircraft, ships, vehicles, etc.

There are three occasions and ways to return to the satellite, one is in the air, hook the rope of the satellite parachute from the airplane. The United States adopted this method in the early days. Second, on land, parachutes allow satellites to land at a speed of several millimeters per second. Our country and the former Soviet Union.

Russia) often uses this method. Third, at sea, the satellite lands on the surface of the sea with a parachute, floats on the water with the help of a sealing device, and applies seawater dye, and ships and planes escape to recover the satellite.

When a satellite is launched at a great speed, it moves in a circular motion. A centrifugal force is generated, and the magnitude of this centrifugal force is proportional to the square of the rotational speed. The greater the speed, the stronger the centrifugal force, when the centrifugal force and gravity are balanced, the object can rotate around the earth non-stop, so as long as the flight speed of the artificial satellite is large enough to balance the gravity, it can fly without stopping and not falling.

Under the gravitational pull of the earth, in order for an object to move in a circle around the earth, the velocity of the object must reach the first cosmic velocity. If the centripetal force required by the satellite happens to be equal to the gravitational force on it, it will move in a circular motion. If the centripetal force required is greater than the Earth's gravitational force, the trajectory of the object becomes an elliptical orbit.

The more the velocity of the object is greater than the orbital velocity (the velocity of the circular motion), the more the elliptical orbit becomes "flattened", until the second cosmic velocity is reached, and the object flies out of the Earth's gravitational field along the parabolic orbit. Because when launching satellites and spacecraft, the speed control of the orbit entry point cannot be absolutely accurate, and the slight deviation of the speed and the slight deviation between the speed direction and the local horizontal direction of the earth will make the orbit of the spacecraft not circular or elliptical, and the ellipse flattening depends on the velocity and direction of the orbit entry point.

According to the principle of physics, when an object moves in a circle, a centrifugal force is generated, and the magnitude of this centrifugal force is proportional to the square of the rotational speed. Therefore, the greater the speed, the stronger the centrifugal force, when the centrifugal force and gravity are balanced, the object can rotate around the earth non-stop, so the flight speed of the artificial satellite must be large enough to balance the gravitational force, so that it can fly without stopping. Among the commonly used satellite orbits, there is the so-called geosynchronous or sun-synchronous, which means that a certain parameter of the satellite orbit is the same as that of the earth or the sun.

If the satellite orbits the Earth as fast as the Earth's rotation, the satellite does not move from the ground, and this satellite orbit is called a geosynchronous orbit. If the orbital surface of a satellite changes as fast as the Earth's revolution, the angle between the orbital plane of the satellite and the Sun is approximately unchanged, and this satellite orbit is called a sun-synchronous orbit. Therefore, geosynchronous orbit is the pursuit of the earth by satellites; The sun-synchronous orbit is not a satellite chasing the sun, but an orbital plane chasing the sun.

Communication satellites require satellite land chasing; Telemetry satellites require orbital planes to chase the sun, allowing the satellite to perform telemetry under the same sunlight. How do artificial satellites break away from gravity and enter space orbit? In order for an artificial satellite to escape gravity, it must use a rocket to fly into the sky at a speed of at least one kilometer per second, which is called the exit velocity.

After the rocket separates the satellite from the satellite at a considerable height, the satellite uses the fuel it carries to propel into its final orbit. Why does the orbit precession? The so-called precession refers to the phenomenon that the satellite departs from the Earth's equator and orbits the earth around the earth without passing through the origin point when returning to the equator.

Since the shape of the Earth is not an ideal spherical shape, satellites are affected by the oblateness effect of the Earth, so the orbital plane is not fixed and precession occurs.

It can be explained by the relationship between gravitational force and centrifugal force.

Yes. With the development of science and technology, human beings can get the launched satellites back to Earth, but the cost will be very high, and there is no need to get them back after the mission has been completed.

No, because it's already in space, even if you launch a missile, you can't destroy it.

It can only be said that it can be done, but the gains outweigh the losses, ** or destroy the satellite structure needs to be redesigned, which will increase the load of the rocket, and the load of each gram on the rocket needs to be carefully calculated.