Basic knowledge of this chapter: A basic understanding of the concepts of weightlessness and overweight is required.

——

After eating, An Chen was about to leave, but was stopped by Marina: "Hey, Sister An Chen, I really found a way to 'restore' the coordinate system we discussed last time-Riemann space, have you heard of it?" ”

"Nope." An Chen replied honestly.

Marina is a candidate of applied mathematics (кандидат_наук), while Anchen is not, so it is normal for her not to know a lot of mathematical "common sense".

"Riemann, have you heard of it? The one that studies the distribution of prime numbers is particularly famous. Marina gestured to her and said, "There is a geometric space called 'Riemann space', which can indeed meet the requirements of four-dimensional curvature. But I haven't learned much about this before, and I may have to learn it for a while. ”

"It's okay, there's no rush for this." An Chen comforted her, "In the near future, we still have to focus on the preliminary preparations for the long-distance -3 plan. ”

"Hey, I'll study for a while, that's just a day or two." Marina tilted her head and smiled, "Don't worry, Sister An Chen, I can tell you the day after tomorrow at the latest, whether that coordinate system meets the requirements of the Riemann space." ”

After she finished speaking, she left happily, and An Chen looked at Marina's back and couldn't help but want to laugh a little. The successor of the "Michelin Miracle" is full of interest and enthusiasm as long as it is not "serious" in front of him.

——

But "down to business" Marina did the same.

After An Chen returned to the satellite control team, he looked at the astronaut applicant information that Marina had screened out again.

The requirements posted at the time of recruitment are relatively broad, but it is also stipulated that applicants must have a bachelor's degree or college degree, as well as a Class A hornet driver's license.

Ten years ago, the newly revised traffic law of the Bee Kingdom stipulates four levels of driving qualifications: A, B, C, and D. In addition to the D class, which is for people with disabilities, the three grades A, B, and C correspond to the qualification to drive with a car, the qualification to drive with a cargo box, and the qualification to drive independently.

Because the safety requirements of carrying passengers will be much higher than that of transporting goods, the technical requirements for drivers with A-level driving qualifications with cars are also higher. One of the most important technologies is the so-called "aerial operation", in which the driver is required to control the wasp in the air while coming out of the car and operating the tow rope outside the car to simulate a dangerous situation in the air.

This technology does not exist in the B-level driving qualification test, because the driver of the cargo wasp should give priority to his own safety by abandoning the cargo in the event of danger, while the A-class driver transporting the passenger car, although still putting his own safety first, cannot abandon the passenger in the event of danger.

And "air operations" happen to be the skills needed for the long-haul-3 manned space program.

As a bee kingdom person, it can be said that it is quite common to ride a hornet, and simply riding a hornet with a C book is not much higher than riding a bicycle on the ground, and the requirements for personal physical fitness, reflexes and spatial direction are not much higher. The utricle and semicircular canals in the hornet's brain function as gyroscopes and levels, and they naturally maintain a fixed posture when flying, and the dorsal side of the chest is always directed in the opposite direction of gravity, so the rider does not need to worry about the direction of space.

But if you want to send people into space, what you need is a good sense of space direction and responsiveness. When the astronaut moves in a circle around the Earth in orbit, the astronaut will be in a state of weightlessness, and there will be no sensory difference between "up" and "down" without feeling the direction of gravity. At that time, they had to make sure that the weightless astronaut still had a good sense of direction.

Of course, in addition to having an A-level driving qualification and a bachelor's or junior college degree, the third major restriction on registration is that you must be a woman – that is, an ordinary woman.

This is mainly due to the traditional concept, most of the people feel that men can produce germ cells, although the vast majority of them cannot really use fertility, but they still need to be protected. In space, there is no protection from the atmosphere, and the intensity of ionizing radiation is much higher than that on the ground, which is easy to cause damage to germ cells. And ordinary women do not have this problem, so that ordinary women go to heaven and are less affected by the non-parliament of the folk morality.

With the exception of the three main constraints, the rest of the conditions are actually resilient.

Because this is the first time in human history that a person is going to be sent to space, no one knows how to select astronauts. Rather than setting up a bunch of standards, it is better to "cast a wide net" and then carefully review them.

More than half of the applicants' information left by Marina after the first review are young women engaged in the research of intra-atmosphere vehicles in the aviation division of the Sky Shield Group. Most of these girls have flown or helped fly fixed-wing aircraft, and some have even flown helicopters.

Marina probably thinks that people who have flown airplanes can also "fly rockets", but whether these girls are qualified for the position of astronauts of long-haul-3 manned rockets depends on the next simulated orbital module test.

The design of the simulation test was done by the satellite control group and was divided into four main items.

The first item is similar to the "air work" assessment format of the A-level driving qualification test, mainly to confirm that the applicant's A-level hornet driver's license is not watery.

The second is the weightlessness test, which requires participants to complete specific actions in a free-fall car to test their sense of space in weightlessness.

The third is the overweight test, which uses a large centrifuge to simulate the G-value that astronauts will endure when the rocket accelerates and decelerates, and tests the applicant's ability to adapt to the overweight environment.

The last one is a psychological test, which is mainly to see if the applicant can adapt to the short-term life in the quarantine cabin.

There is also a debate as to whether this item is necessary or not. In the isolation cabin on the ground, after all, it is different from the orbital module in space, and the psychological cognition of the two is different from the subject. People who are unable to adapt to true isolation will not necessarily perform worse than others in ground-based quarantine pods.

However, psychometric tests were still included in the interview after the initial screening. This is to screen out those who are too timid as soon as possible, and reduce the waste of resources for follow-up training and secondary selection.

After the first round of interviews, those who pass also undergo more targeted training. After another selection, five astronaut candidates were selected, and in the end, only one person could actually get into the payload of the long-haul-3 rocket, leaving the Earth's atmosphere and going into space.

An Chen actually wants to be the first person to break through the atmosphere, but she also knows that not everyone thinks this way among the girls who signed up for the election.

Flying into space is still dangerous, and no one can guarantee that the first time you send someone to space will be 100% successful. An Chen knew that among the hundreds of trillions of registration materials, there must be many applicants who went for the generous bonuses of the Emperor Sky Shield Group.

She thinks this is normal, after all, people are self-interested first and foremost. People like her and Paanka are well-fed and well-fed, and they can devote themselves to the cause they love. But for those ordinary workers who "stop talking", finding a job that pays satisfactorily is the focus of life.