Working principle of the satellite

Working principle of the satellite: when the satellite is working, the image signal or sound signal or data signal on the ground is received by the high-frequency transmitting device to the geosynchronous satellite transmitting satellite, and then transmitted to the earth through signal amplification and frequency distribution. The satellite receiver on the earth receives the satellite signal through the satellite receiving antenna, and separates the signal through frequency division, then display or broadcast through the amplification circuit and terminal equipment.

Principles of satellite launch

Three principles were used in satellite launch, which was mentioned in middle school. The first principle used by rockets is that gases expand to do work, and chemical energy is converted into kinetic energy through combustion. The second principle is that force equals reaction, when the gas is ejected downward, the rocket will be pushed upward. The third satellite uses the principle of centrifugal force. As long as the centrifugal force of the satellite is equal to gravity, it will not fall. The principle is not complicated, but it is difficult to inject certain fuel quality and obtain certain power in actual technology; Since the total thrust is constant, the rocket will also obtain thrust until the speed reaches a certain height. The actual process is that the rocket must constantly accelerate and take off to reach 7.9 km/s (and air resistance). If the rocket accelerates from 0 to 7.9 km/s at the same time, it is expected that the rocket will be pressed into biscuits and astronauts will become meat paste. When the rocket flies to the corresponding orbit in space and the speed reaches 7.9 km/s, the surrounding environment will be similar to that predicted by Uncle Newton.

Satellite operation

When the satellite is running, the ground image signal or sound signal or data signal should be transmitted to the geosynchronous satellite through the high frequency transmission device. After receiving the satellite, it is transmitted to Earth through signal amplification and frequency distribution. Satellite receivers on earth receive satellite signals through satellite lines in the sky, then separate the signals by frequency division, and then visualize or transmit them through amplifying circuits and terminal equipment.

Principle of satellite communication

The principle of satellite communication is to launch the satellite into the geostationary orbit 36000 km above the equator, use the satellite communication repeater to receive the signal sent from the ground station, amplify and convert the signal and send it to other ground stations to complete the transmission between the two ground stations. In fact, the communication satellite is a microwave transmitting station, and the artificial earth satellite can operate in the earth orbit s, mainly because it has the first cosmic speed (7.9 km/s), and because the earth's gravity (centripetal force) pulls it, just like throwing a stone on a string.