When Tang Yue came up with the calculation result, he was very excited, thinking that he had held the handle of fate, the old cat once said that the end of the United Space Station was already doomed, but they couldn't see it - but now Tang Yue saw it, he calculated a very rough result, and there was hope in this result.

As long as there is hope, then he can try to turn it into reality.

"Tang Yue, you and Mr. Cat are crazier than the other." "It was very bold to use the Orion spacecraft as a lander before, and now you want to turn the cargo spacecraft into a fighter jet." ”

The implication is that you are too profligate.

The Orion spacecraft and the United Space Station are just gone.

"If it gets out of control, it's a situation from which nothing can be recovered...... Mai Dong expressed his concerns.

"We're long gone, and now it's time to live one more day and earn one more day." Tang Yue waved his hand, to be honest, he cared more about Mai Dong's life than the Tianzhou cargo spaceship, if the latter could not land safely, the Tianzhou spacecraft would blow up, anyway, he didn't like to eat lobsters.

According to Mai Dong's several estimated orbital altitudes, the altitude of the Joint Space Station is continuing to decline, and the rate of decline is getting faster and faster, and the simulation results of the station are that it will fall to the range of 100 kilometers to 110 kilometers on the seventh day, the altitude will fall below 100 kilometers on the eighth day, the orbit will remain above 90 kilometers on the ninth day, and it will fall below 80 kilometers on the tenth day.

This rate of descent is slower than expected by the old cat because the northern hemisphere has entered spring, the position of Mars in its orbit has changed, the atmospheric activity in the lower layers has gradually intensified, the temperature of the upper atmosphere has dropped and it has begun to sink, and the edge of the atmosphere is thinner than before, causing less drag on the space station.

But atmospheric activity is almost completely random, and no one can predict it with precision.

On the tenth day, the Tianzhou-37 cargo spacecraft will arrive and dock with the space station at an altitude of about 80 kilometers.

It's a pity that the distance estimated by the jumping eye method is not very accurate, and the slightest difference will smash the entire plate in such a difficult operation as docking, but now the data in Tang Yue's hand may have a huge error of several kilometers, so the calculation needs to be further accurate.

"Well, I'm at the limit of what I've done, and I'll need more complex mathematical models to go further along...... This is beyond my ability......" Tang Yue held the pen in his hand, stared at the equation on the paper for a long time, and then scratched his head, and when he touched the real hard bones, his essence as a scumbag from a non-professional class was exposed.

He double-checked his calculations to make sure there were no mistakes.

"I can try to be a little more precise, a decimal point should be able to do, I think I scored 138 in mathematics and 96 in physics in the college entrance examination, and the foundation is quite solid." Tang Yue raised his pen again and frowned, "It should be ...... below." ...... below"

"I'll leave it to the old cat."

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The old cat came back after inspecting the landing site.

Tang Yue handed it the scratch paper in his hand.

The old cat took the manuscript paper, raised his eyebrows, squinted his eyes and swept it, "This is the result of your busy work on the table in the last two days?" I was so busy that I couldn't eat well...... Predicted orbit ...... of the United Space Station"

The old cat suddenly laughed.

"Tang Yue, you're just an electrical engineer."

"What happened to the electrical engineer?" Tang Yue was very dissatisfied with the old cat's tone, "Isn't an electrical engineer counted as this?" ”

"Yes, yes, of course, you can do it if the law does not prohibit it, you can not only calculate this, but you can also calculate the life of the big black hole in the center of the Milky Way...... Let me see, let me see. The old cat put on the headphones, pulled over a chair and sat down, cocked Erlang's legs, stared intently, and began to examine Tang Yue's calculations, "Let me see ......"

Tang Yue was a little nervous, as if he had just handed in his homework, and the teacher was correcting it.

He thinks that his calculations are not wrong, but the old cat's admission can really make his results final and become a valid basis.

"How?"

The old cat was silent for a long time and didn't speak, it turned over the scratch paper in its hand and looked at it over and over again, and finally rolled its eyes, and its eyes scraped over Tang Yue's body, at this moment it really looked like an old teacher correcting homework.

"According to your calculations, by the tenth day, the Joint Space Station has fallen to an altitude of eighty kilometers." The old cat said in an inquiring tone, "At this time, you let Tianzhou come up, do you know what it means?" ”

"Yes."

"You know a." The old cat rolled his eyes, "Just imagine, let a hypersonic fighter open the cockpit cover during the flight and let the pilot climb into another plane a few feet away, do you think this is filming "Mission Impossible"?" The person trapped in the space station is the action veteran Tom? ”

"The Tianzhou spacecraft is a big steamed bun, without any pneumatic operation rudder surface, how do you precisely control it to dock with the space station in the atmosphere?"

"How do you control the posture of such an irregular thing as the Joint Space Station? What if it's too weirdly positioned? ”

"Do you know what happens if there is a scrape between these two things?"

The old cat's questions were very sharp, and they were thrown out one after another, leaving Tang Yue speechless and ruthless.

"Your idea is too anti-human and anti-social, and the probability of failure is 99 percent." The old cat finally patted the paper and commented.

It's one thing to calculate, it's another to actually implement.

"I ...... I can't do it, you can come up with a feasible solution. Tang Yue was anxious, "What problem can be solved by finding faults?" ”

"That's my plan." The old cat returned the scratch paper in his hand to its original owner.

Tang Yue was stunned.

"Your plan is actually the same as mine, I was going to tell you the detailed plan steps until tomorrow, but since you have calculated it yourself, then I don't need to wait until tomorrow." The old cat's serious old face suddenly relaxed, "It's just that your calculation results are too rough, and this result can't be used as a guide for the action plan, we still need more and more accurate data to improve it." ”

"So that's possible?" Tang Yue asked, "You just said that the chance of failure is 99 percent......

"It's not a question of whether it's feasible or not." The old cat shrugged his shoulders, "If there are conditions, we will go up, and if there are no conditions, we will create conditions, since the design allows, then we will squeeze the performance limit of the Tianzhou spacecraft...... Although it does not have the consecration of the Patriarch, the heavenly spirits of the Chief Master will bless us. ”

"We can set up the position of the third division, the chief engineer blesses the normal operation of the spacecraft program and completes the instructions, the chief designer blesses the perfect aerodynamic operation of the spacecraft without making mistakes, and the chief craftsman blesses the spacecraft body to be strong enough and make no mistakes." The old cat continued, "This is your forte, Tang Yue. ”

"Can you do the docking operation?"

"I can't do it." The old cat is very crisp.