There are still thirty seconds left before the first stage rocket detaches.

Thirty seconds later, the two Raptor 3C engines of the Eagle spacecraft will run out of propellant, and then detach from the payload compartment of the upper stage, and the next lander will enter the unpowered taxiing stage, once it enters the unpowered taxiing stage, then the Eagle spacecraft will fly completely according to inertia, like a stone thrown out, and the instructions issued by the Kunlun station will not play a role.

You shout "Fly!" at a rock that is in free fall. Fly! No matter how much the stone wants to struggle, it is also powerless.

The timer on the computer screen beats second by second.

The small green light in the upper right corner of the screen has turned red, it has not flashed for a long time, which means that the Kunlun station has not received a signal for a long time, the last time the Eagle spacecraft reported its own situation was two minutes ago, it is like their own children enlisted in the army and stepped on the battlefield, Tang Yue and Lao Mao, the two parents stay at home, and they will be anxious if they don't receive a letter from home for a month.

One hundred and eighty seconds after the launch of the Eagle spacecraft.

There are twenty seconds left before the first stage rocket detaches.

If nothing else, the lander at this moment should be flying at an altitude of 280 kilometers above the surface of Mars at a speed of 3,000 kilometers per second.

The old cat stared at the predicted trajectory on the screen, and the dotted line had its last short segment.

At the end of the dotted line is the rail injection point.

The Eagle spacecraft's docking orbit injection point is at apogee, which is the highest position from the ground in the entire orbit, at an altitude of 350 kilometers, and the two Raptor 3C rockets will send the payload module to the apogee at a speed slightly lower than the orbital velocity, and then the first stage rocket will disengage, and the lander will become an unpowered iron lump, which will fall from 350 kilometers from the highest point to 150 kilometers at the perigee, like a free fall, the gravitational potential energy is converted into kinetic energy.

Then from the 150-kilometer-high perigee back to the apogee, like a roller coaster, the kinetic energy is converted back into gravitational potential energy.

This is the landing vehicle's berthing track, which is drawn as a large ellipse.

"Let the storm come harder!" Tang Yue's shout came from the old cat's headphones, and in a few minutes, the thinking of this second goods had jumped from the afterglow of Long Yingtai to Gorky's "Haiyan".

"I know you're anxious." The old cat said, "But please be normal when you're nervous." ”

"I'm using the crystallization of the wisdom of my predecessors to soothe my excited heart, why is this not normal?"

"Then please recite the Mind Purifying Mantra in silence."

"Purifying the Mind Mantra? Mind Purifying Mantra...... It's too big a star, and the strain doesn't stop! Exorcise evil spirits and protect your life! Wisdom and clarity, peace of mind! The three souls are eternal, and there is no loss of soul! Tang Yue opened his mouth and came, reciting the incantation word by word, inexplicably imposing, this thing was holding an antenna and roaring in the storm with Mingguang armor, like a demon villain, "Urgent as a law!" ”

The old cat silently held his forehead, it didn't know that Tang Yue would really recite this mantra, otherwise it would change its mouth and let him recite the "Diamond Sutra".

"Isn't there any news from the little eaglet?"

"Nope." The old cat shook his head, "Why are you so verbose like an old mother?" You have to have faith in the lander...... Shouldn't parents trust their children? You have to believe that the Eagle ship is an obedient and good daughter. ”

"Good daughter?" Tang Yue was stunned, "No, no, no, no, the little eagle is obviously a son." ”

"Why does it have to be a son?" The old cat asked.

"Of course it's got to be a son!" Tang Yue said, "If it's a daughter, then who is willing to let her out?" Have you ever seen a family that sends their daughter to war? ”

The old cat casually chatted with Tang Yue while staring at the screen.

According to common sense, there will be no problems with the Eagle spacecraft at this time, in the eyes of the old cat, the biggest problem when launching is the storm, but they are very lucky, they just happened to encounter the cyclonic low pressure area, and the wind speed is reduced to less than 30 meters per second, and this level of wind speed will not have any impact on the lander.

By the time the Eagle spacecraft lost contact with the Kunlun station, the former had risen to an altitude of 20 kilometers, and at an altitude of 20 kilometers on Mars, it was almost indistinguishable from a vacuum, and the atmosphere was extremely thin, and there was no activity at all.

That is, it was a largely perfect launch with minimal external environmental influences.

There are ten seconds left before the first-stage rocket detaches.

The computer has begun to count down.

The green light in the upper right corner of the screen suddenly flashed, the old cat's eyes froze, his pupils shrank, and he yelled: "Shut up Tang Yue!" Don't ramble, adjust the antenna back by one degree! The positive elevation angle has been adjusted up by 15 degrees! ”

"Roger!"

Kunlun Station suddenly caught a hint of a faint signal, and the old cat was very keenly aware of it, and it asked Tang Yue to fine-tune the direction of the antenna back.

The strength of the signal increased suddenly, and the broken line on the computer screen that was close to the X-axis suddenly fluctuated in a certain range, like an electrocardiogram of a dying patient, and the data transmission speed suddenly increased from a few B's per second to a few KB.

"Tang Yue steady!" The old cat drank.

The speed of data transmission is fluctuating, only a few bytes per second at a low time, and thousands of bytes at a high time, which is slower than the Internet speed of the oldest dial-up Internet on earth in the era, but the old cat is nervous and excited.

The Kunlun station and the Eagle spacecraft once again established a fragile communication channel, a fragile kite line more than 200 kilometers long, fluttering in a sandstorm of 40 meters per second.

The countdown of the computer timer continues.

There are five seconds left for the first-stage rocket to detach.

There are still zero seconds left for the first stage rocket to break away!

The old cat was stunned.

Zero? Why did five jump to zero directly? What about four-three-two-one?

Before the old cat could react, a warning popped up on the screen, and a huge red exclamation mark began to flash wildly - the preset flight trajectory did not match the actual parameters of the Eagle spacecraft!

The old cat saw the data sent back by the lander.

The first-stage rocket has detached.

The height is two hundred and eighty-five kilometers.

Two hundred and eighty-five kilometers? The old cat's eyes widened, the first-stage rockets had already been abandoned, how could the altitude of the lander be only two hundred and eighty kilometers?

According to the preset flight procedure, when the first-stage rocket is detached, the altitude of the Eagle spacecraft should be 350 kilometers!

The computer detected that the actual parameters reported by the Eagle spacecraft did not match the preset orbit at all, so the countdown was interrupted and the alarm was started.

It's like the arduous Battle of Stalingrad is finally over, and the official sends a notice to your family, telling you that the battle is over, that your child should have triumphantly evacuated the battlefield and stepped on the train home, and you should wait for your son at home.

Just as you were sharpening your knives and preparing to welcome your son to his hometown, a letter from your son arrived, and he said to you: "Dear father and mother, I have been captured by the German devils and will be shot soon."

I'm rubbing...... What about the successful evacuation from the battlefield? What about stepping on the train home?

The old cat, who is a father, looks confused.