There are many kinds of artificial earth satellites.
From the orbit, it can be divided into: low-orbit satellites with a height of 200 ~ 2000 kilometers; Medium-and high-orbit satellites with an altitude exceeding 2,000-20,000 km; Geosynchronous satellite with an altitude of 35,786 kilometers.
From the purpose, it can be divided into: scientific satellite, technical test satellite and application satellite. Among them, the technical test satellite is specially used to test the related performance of satellite engineering technology and space application technology. Many new aerospace technologies, new principles, new schemes, new equipment and new materials are generally tested by satellites before they can be officially used.
This time, Tianxing-1 is a technical test satellite, which is mainly used to carry out experiments such as space environment exploration.
Tianxing-1 specializes in exploring the physical environment in space. This kind of satellite can run for a long time without the influence of the atmosphere, and can directly detect the physical environment in space. The detection object mainly includes the following contents:
Neutral particles. There are gases around the earth, other planets and satellites, which are mainly composed of neutral atoms and molecules. We can use some scientific detection instruments to collect these samples, analyze their composition and density, and then we can get the atmospheric density.
High energy charged particles. In fact, there are many high-energy charged particles in space, such as electrons, protons and heavy ions, which are not only charged, but also have amazing energy, which will have a certain impact on the earth and aircraft. Their flux, composition and energy spectrum distribution can be measured by instruments.
Plasma. There are not only high-energy charged particles in space, but also a lot of plasma. If you are familiar with physics, you should know that most substances in space exist in the form of plasma, such as the ionosphere of the earth and the solar wind. It is very important to detect them.
Micro meteoroids. These solid particles are abundant in the solar system and will affect spacecraft in low orbit.
Magnetic field. It is an important parameter of space environment, and space exploration satellites can detect the earth's magnetic field and planetary magnetic field, because the distribution and change of these magnetic fields will have a great impact on the earth's space environment. Therefore, it is necessary to study them.
The successful launch of Star One was planned and prepared. It is impossible to say that a satellite is needed now and can be launched soon. It must have gone through a long and complicated process. The successful launch of Star One not only completed the established mission, but also reflected the overall scientific and technological strength of China.
I have to say that these satellites in orbit, including Tianxing-1, are really great, and the data they provide will definitely benefit mankind in the future, making people's lives more convenient, efficient and safe.