What is it like to "catch dolls" on the moon and "speed cars" on Mars? They can tell you the answer

What is it like to "catch dolls" 380,000 kilometers away?

What is it like to race on Mars?

Recently, the CCTV program "Let's Talk"

From Beijing Aerospace Flight Control Center

General Dispatcher "Beijing Knows" Bao Shuo

Zhang Hui, the driver of the Zhurong

Spacecraft orbit designer Ma Chuanling

Uncover the behind-the-scenes stories of China's space highlights↓

"Catching Dolls" on the Moon

Bao Shuo revealed that the moon is 380,000 kilometers away from the earth. When Chang'e 5 collects samples on the lunar surface, it needs to complete surface collection, sampling, and layout within 48 hours. The process is similar to "catching dolls."

"If we don't hold it firmly, all our efforts will be wasted. Seeing it grasp it accurately and lift it up little by little, our hearts are lifted as well."

The remote control operation has an accuracy of 1 mm. In order to develop tacit understanding, they practiced digging on the ground for about 3 hours, but in actual operation, the fastest time was 37 minutes. "The can fell into the sealed can with a 'swish' sound, and everyone cheered 'Mission Success'!"

Ma Chuanling, the orbit designer, said that the fuel for the spacecraft is limited and every gram is very precious. There are strict time constraints for Chang'e 5's landing and takeoff on the moon. If the window is missed, the lunar soil may disappear in the vast space.

Bao Shuo lamented that behind every piece of news about a "mission being a complete success", the preparation period for aerospace workers can be as short as a year or as long as ten years. "You have to work very hard to make it look effortless."

Racing on Mars

The terrain of Mars is extremely uncertain and has certain visual deceptions. It may appear flat but may have depressions. As the pilot of Zhurong, Zhang Hui needs to work with the team to avoid these depressions.

Zhang Hui calls himself a "Martian on Earth." Because Mars has 40 minutes more time per day than Earth, he and his team have to synchronize their schedules with the Mars rover and work 40 minutes more every day.

In order to successfully take the photo of the Zhurong rover and the landing platform taken by its separation camera, Zhang Hui and the rover's experimental team started over again.

During this time, Zhang Hui's daughter had a high fever late at night and kept crying "I want daddy". At that time, Zhang Hui was "racing" on Mars. Although he was only 400 meters away from home, his heart was on the Mars rover billions of kilometers away.

After three years of research, Zhang Hui and his team have developed a complete set of plans and plans. On the evening of May 31, 2021, Zhang Hui called his daughter and wanted to give her the most beautiful gift on Children's Day. The next day (June 1, 2021), on Children's Day, Zhang Hui and his team successfully took a photo of the two devices.

Do hundreds of thousands of useless things

"Queqiao" is the relay satellite of the Chang'e-4 probe and also a communication node connecting the Earth and the back of the Moon.

Before the launch of Queqiao, Ma Chuanling and his colleagues designed an orbit correction cycle for Queqiao of about every seven days. But when Queqiao was actually launched, they found that the shortened cycle would increase fuel consumption and shorten the life of the spacecraft.

After several months of exploration, Ma Chuanling and his colleagues designed a new method to correct the orbit of the Queqiao satellite, saving fuel and extending the life of the satellite.

A spacecraft has only one trajectory, but Ma Chuanling has to design thousands, tens of thousands, or even hundreds of thousands of trajectories in actual missions to protect the spacecraft. He said: "I hope that none of the hundreds of thousands of contingency plans will be used."

In their hearts

There is an infinitely vast sea of ​​stars

But they will always stay grounded

One step at a time

pay tribute!