What Is a Soft Reference?

"Soft landing" is relative to "hard landing". There are usually two meanings. One is the landing in the physical sense, which specifically refers to a landing mode in which a spacecraft is safely decelerated at a certain speed after being decelerated by a special reduction device. The other is an extended landing. Specifically refers to the adoption of security measures in the financial and other fields to achieve the purpose of security and stability in the financial field.

Pronunciation run zhuó lù

[ Interpretation ] A landing mode in which a spacecraft is safely decelerated at a certain speed after being decelerated by a special reduction device. Conversely, space

The soft track surface includes grass, beach, mud, snow and other road surfaces. When taking off and landing on the soft track surface, it has the following characteristics:

It is difficult to land with a taxi.

The terrain of the land area is undulating, and the maximum undulation may even reach several kilometers, with ups and downs and dangers surrounding.

Landing requirements are high, and the equipment needs to be able to resist impact and overload.

Rough terrain may also cause landing equipment to jump.

A special reverse thrust device is required.

On February 11, 2015, American Space Exploration Technology Corporation launched a deep-air elephant satellite shelved for more than ten years. This is also the company's first deep-space mission. The "accurate landing" test was changed to a soft landing test at sea with relatively low technical difficulty due to weather conditions and was successful. ^[1]

At the beginning of the new year in 2019, China's lunar exploration project has achieved a good start-at 10:26 on January 3, after a long flight of about 380,000 kilometers and 26 days, the Chinese Chang'e-4 probe autonomously landed on the back of the moon to realize human detection The aircraft made a soft landing on the moon's back for the first time.