When the Eagle spacecraft was closest to the United Space Station, the distance between the two was only one hundred and ten kilometers.

At this distance, if someone were looking in the direction of the space station from the Eagle spacecraft, he could see each other with the naked eye, the huge solar panels and white bulkheads reflecting the sunlight like a sparkling diamond on pitch-black velvet.

The Russian-made RD-0172 engine is started, the turbopump is running rapidly, and liquid hydrogen and liquid oxygen are burned in the combustion chamber and sprayed out at high speed through the nozzle.

The vacuum isolated the roar of propellant burning, and the Eagle spacecraft accelerated in silence, and the behemoth weighing more than ten tons began to detach from its orbit!

The old cat stared at the computer, and the flight trajectory of the lander drew a large arc on the screen, which perfectly tangent to the orbit of the joint space station, which was the transfer orbit of the Eagle spacecraft - they gave up the safe plan of two orbit changes and two transfer orbits, and the price they would have to pay was that the accuracy of the operation must be greatly improved, and the lander jumped into the orbit of the space station without any difference.

It's like asking someone to drive a dozen tons of rear eight-wheeled trailer and make a drift lane change at more than a dozen times the speed of sound, driving it precisely into a narrow alley that is only two centimeters wider than a truck.

The old cat is the driver of the truck at the moment.

It is 300 kilometers away, remote control of the Eagle spacecraft, this is a docking mission with a success rate of only 2.477%, it is an opportunity that Tang Yue fought hard for it, so the old cat also has to fight for his life.

"Fix the orbital plane! Correct the posture! ”

Correcting Time Deviation...... The target aircraft and the tracking aircraft are synchronized in time, and the synchronization is complete! Track parameters are starting to be corrected! ”

"Fixed!"

"Forward Phase Modulation ......"

The old cat only has fast-changing icons and parameters in front of him, and the lower end of the computer screen is full of all kinds of countdowns, each process starts and ends, like gears biting into each other, and the old cat is the most important part of it, and all the data of the Eagle spacecraft and the United Space Station are summarized here!

The huge data stream poured down from the orbit of 400 kilometers above their heads, passed through the antenna in Tang Yue's hand, and entered the system computer of Kunlun Station, where the old cat sat in the center and gave orders.

"The Eagle ship passes through the first mooring point! The absolute velocity is 3451.22 m/s, and the relative velocity is 227.89 m/s! 60,166 meters from the target aircraft! Enter the remote guidance section! The old cat shouted, "Mai Dong! ”

"Roger!"

"Turn on the transponder and the MR system will start looking!" The old cat instructed, "Lock on the tracking aircraft!" Girl, you know how to do it, right? I just taught you! ”

"Uh-huh! I know, I know! Open the RAD control panel and TURN ON ...... POWER key! Next up is PRHEAT! Then adjust the microwave radar parameters...... Wait until the red cross appears in the center of the screen and adjust the pitch angle! ”

Two minutes later.

"Locked! Mr. Cat, the microwave radar has locked onto the target! ”

"Excellent! What a smart little girl! The Eagle spacecraft enters the second berthing point! The absolute velocity is 3554.36 m/s, and the relative velocity is 221.41 m/s! 35188.69 meters away from the target aircraft! The old cat shouted, "Mai Dong! ”

"Roger!"

"Goniometric with MR systems! Establish a relative motion coordinate system! ”

“OK…… The goniometric antenna element has been activated to confirm the signal carrier phase difference! Confirm the signal carrier phase difference! Mai Dong's voice trembled slightly, "Confirm the upper and lower bounds of the angle measurement range!" ”

"The upper and lower boundaries of the azimuth are determined! The azimuth step size is determined! ”

"The upper and lower bounds of the pitch angle are determined! The pitch angle step size is confirmed! ”

Mai Dong grabbed the headphones and shouted.

The data on the screen in front of the old cat's eyes was refreshed, and a complete coordinate map was constructed.

"Very good, girl, you are doing well, don't be nervous...... Calm down! Calm down! You can do it! The Eagle is ready to enter the homing stage! Absolute speed 3517.32 m/s! Relative velocity 220.08 m/s! 11278.39 meters from the target aircraft! The old cat comforted Mai Dong while giving instructions to the Eagle spacecraft, "The RD-0172 engine turns around!" Start slowing down! ”

The lander on the screen is getting closer to the space station, and the distance between the two has been reduced to ten kilometers.

At this point, even Mai Dong in the core module could see the Eagle spaceship, and through the porthole, she could see in the dark deep sky in the distance, there was a shiny white spaceship, it was only the size of a grain of rice, as if it was a lonely boat in the deep sea.

The girl's tears welled up uncontrollably.

"Tang Yue! Tang Yue, are you okay? Can it hold on? The old cat asked.

Tang Yue hadn't spoken for a long time, and the old cat was a little worried about his condition.

"Also...... It's okay, don't worry about me, it's ...... Where have we got? ”

Tang Yue's voice was very weak.

"The last five kilometers!" The old cat said, "The Eagle ship has entered the third berth!" Absolute speed 3511.17 m/s! Relative velocity 107.35 m/s! 4823.07 meters from the target aircraft! ”

"That'...... So are we...... Coming soon? ”

"That's right! That's right! We're on the verge of success! It's about to be a success! You hold on a little longer! The old cat nodded, the distance is close to five kilometers, which means that the long-range guidance section has ended, followed by the homing section and the approaching stage, the rendezvous of the Eagle spacecraft has been successful, and there are still five kilometers left for docking.

For this difficult and long 400-plus kilometers, five kilometers is really negligible.

"Mai Dong!"

"Roger!"

"Turn on the Track Control Sensor!" The old cat instructed, "Its operation panel is on the right side of the RAD system!" It has the English abbreviation TCS in white! Do you see it? ”

“TCS，TCS…… Got it! ”

"Open it!" Lao Mao ordered that different telemetry equipment on the space station have different operating distances, and at a distance of 100 kilometers, the guidance equipment of the joint space station is microwave radar, but the microwave radar has limited accuracy at close range, so when the Eagle spacecraft approaches within one kilometer of the space station, the microwave radar will take over the work of the TCS system, the full name is the orbit control sensor (Tark Control Sensor).

At the heart of the track control sensor is a laser rangefinder that measures far more accurately than microwaves at close range.

Mai Dong opens the TCS system.

In the next second, the data appeared in front of the old cat's eyes.

"Orbit parameters corrected again!"

"Azimuth corrected again!"

"Depression angle corrected again!" The old cat said, "Mai Dong turned on the optical imaging sensor!" ”

"Roger! The optical sensor is on! ”

"Beautiful! Mai Dong, you are such a genius beautiful girl! ”

The distance between the Eagle spacecraft and the space station approached to 800 meters, and the relative velocity dropped to 30 meters per second.

The old cat precisely controlled the lander, and the attitude control rocket finely adjusted the state of the Eagle spacecraft, which had already aligned the interface of the space station and was ready to enter the hole with one shot.

The old cat's old driver's driving level is really not true, the system computer gave a prediction result, a red line and a blue line perfectly coincided, which shows that the Eagle spacecraft is flying in the most perfect orbit, not bad.

It really drove the trailer weighing more than ten tons into the alley, and it didn't even touch the rearview mirror.

According to the current trajectory, the Eagle spacecraft can fully reduce to a safe speed before docking and dock autonomously.

The old cat breathed a sigh of relief.

There were still four hundred meters left, and the relative velocity dropped to fifteen meters per second.

"Tang Yue, can Tang Yue hear me?" The old cat called Tang Yue, "We're about to succeed!" Half a minute to go! The express delivery will be delivered in half a minute! ”

"Good...... Then I'll ...... again Hold on for half a minute! ”

The old cat nodded, if there was no Tang Yue this time, the docking would definitely fail, it was Tang Yue who risked his life to prop up the antenna, so that the old cat could successfully contact the lander and the space station, and provide them with guidance, even if the original success rate was only 2.477%, as long as you are willing to gamble your life, you can burst out of miracles.

There are still three hundred meters left, and the relative speed drops to ten meters per second.

The old cats want to cheer.

Haha, it works! It says it works!

"Cat...... Mr. Cat? Mai Dong called it timidly.

"Huh?"

"Is there something wrong with me...... There's an alarm on the space station. Mai Dong said.

Alarm? The old cat was stunned for a moment, and before he could react, an alarm window popped up on the screen in front of him, a huge exclamation mark, and eye-catching red letters flashed wildly.

WARNING:IMPACT！

The old cat was stunned for a moment, then pressed the headphones and subconsciously yelled: "Run!" Escape! Mai Dong escapes——! ”