Orion II finally broke through the height of 10,000 meters.

The Orion II spacecraft has survived the most difficult and dangerous level, the external temperature of the fuselage is decreasing, the engine thrust is normal, the state is basically stable, the system computer directs the various modules of the spacecraft, working step by step, the old cat said that this simulation test has the certainty of the Milky Way, and now it seems that it is really nine out of ten.

The chassis of the workstation was roaring, and the overall simulation of the Orion spacecraft had drained its performance limit, and the chassis shell was very hot to the touch, and Tang Yue had to bring ice cubes to cool it down.

"The IMU data is updated, the radio flight is normal, the Orion passes through the ninth waypoint, the landing ellipse is expected to be 30×30km, and the landing site elevation is expected to be 1.3km."

"The mass is trimmed, the track angle is adjusted again, and the throttling adjustment is normal."

"Dynamic pressure 880Pa!"

Tang Yue's heart slowly pulled up again, watching the height of Orion 2 gradually decrease, about to enter the descent landing stage, his heartbeat involuntarily accelerated, the huge spaceship weighing hundreds of tons broke through the limit of people's imagination, from a track more than 100 kilometers high headlong, through the black barrier and flames, across the heavy life and death, if there is anything in this world that is as close as a hand away and difficult to surpass the journey to the sky, then it must be the landing of the Orion II spacecraft.

He, the old cat and Mai Dong have worked hard for so long for this moment.

"6,457.3 meters above sea level."

"The altitude is 5107.9 meters above sea level."

"The altitude is 4826.0 meters above sea level."

Every once in a while, the old cat reports on the Orion.

The altimeter was rolling rapidly, and Orion 2 was already in a state of constant motion, and its flight speed was reduced to less than 100 meters per second.

"The altitude is 3989.4 meters above sea level." The old cat's voice was low and steady.

Tang Yue sat in the chair, his palms were full of sweat, the closer he got to success, the more nervous he became, Tang Yue had no intention of staring at the data on the monitor, the beating numbers had lost their meaning in Tang Yue's eyes, and his mind was full of prayers that the test could be a complete success.

Tang Yue stood next to the model of the Orion II spacecraft, he held the model with both hands, and whispered, "God, please roll a six."

The altitude of the constellation Orion goes to the last kilometer, and it enters the final stage of the landing process, the landing segment.

There was very little fuel left in the propellant tank, and the Raptor 10D rocket engine was a big fuel guster, burning three hundred gallons of fuel per second with five engines. The system computer adjusted the flow of the rocket again, increasing the thrust, and the Orion II spacecraft began to slow down for the last time.

Its current speed is eighty-seven meters per second, and Orion will have to reduce its speed to zero before landing.

"Miss Mai Dong!" The old cat called Mai Dong.

"Roger." Mai Dong replied, she raised her wrist and glanced at the time, seven hundred and twenty seconds after re-entering the atmosphere, according to the plan, she was going to leave Orion at the seven hundred and forty-fifth seconds, the old cat's plan was very accurate, and every moment was stuck on the point.

The Eagle lander is tied to an airbag and hung on the central module of the Orion spacecraft, and the stationary release limit of the lander is two hundred meters, that is to say, the altitude below two hundred meters is released, and the airbag can ensure the safety of Mai Dong - but for Tang Yue and the old cat, the height of two hundred meters is still too risky, and the ideal and safest height should be thirty-five meters.

Because the distance from the landing vehicle to the end of the spacecraft is thirty-five meters.

This also means having Orion hover at almost zero altitude close to the ground, and then allowing the lander to disengage from the spacecraft and land safely.

After the dismantling, the Eagle lander is a twelve-ton big guy, even in the gravity field of Mars, it is still a thing weighing nearly five tons, and it is difficult to say whether there will be any problems when it is smashed down at a height of two hundred meters - not to mention that the airbags on the lander have experienced the baptism of four hundred degrees of high temperature, and the strength may have dropped significantly, so the old cat and Tang Yue are not at ease.

The lower the detachment height, the better.

Mai Dong looked at the time on his watch.

Seven hundred and forty seconds.

The Orion spacecraft is one hundred and twenty meters above the ground.

"The GNC system is normal, the radio flight is normal, the UHF band communication is normal, the X-band communication is normal, the Orion landing speed is twenty meters per second, it enters the end of the landing segment and arrives at the intended landing site! Attention Miss Mai Dong, out of the countdown! ”

Seven hundred and forty-one seconds.

The Orion spacecraft is at an altitude of one hundred meters above the ground.

"The target attitude is stable, the RCS control is normal, the altitude is a hundred meters above sea level, there is a weak crosswind, and the angle of attack is rebalanced!"

The old cat and Tang Yue were in front of the same screen, the workstation had already summarized all the data here, a large number of sensors were alarming, and the Orion II spacecraft had broken through many obstacles to arrive here, and it was already scarred, like a soldier who had crossed the line of fire and was covered in bruises.

It still has its last breath left.

Less than five percent of the fuel remained in the propellant tank, enough to burn for another five seconds.

Seven hundred and forty-two seconds.

The Orion spacecraft is eighty meters above the ground.

"Code 1260 Alarm!"

"Code 1280 Alarm!"

"Code 1320 Call the Police!"

The old cat and Tang Yue clenched their fists at the same time.

No amount of alarm is important, the historical mission of the Orion 2 spacecraft is about to be completed, and it only needs to hold on for three more seconds to sail into history with glory and glory, as one of the greatest and most legendary spacecraft in the world, remembered by human civilization and even the whole universe.

Seven hundred and forty-three seconds.

The Orion spacecraft is sixty meters above the ground.

Seven hundred and forty-four seconds.

The Orion spacecraft is twenty meters above the ground.

Seven hundred and forty-five seconds.

The spaceship icon on the monitor is slowly grounded.

"Zero elevation!" The old cat and Tang Yue yelled at the same time, "It's now—get out!" ”

Mai Dong used all his strength to pull the lever under the command seat, and the wire rope moved to trigger the fuse, and the pyrotechnics in the docking mechanism exploded at the same time! The faint impact of the explosion pushed the lander away from the imminent crash of Orion, and the Eagle spacecraft landed along the parabola.

The Orion II spacecraft hovered in mid-air for the last second, until the propellant was all depleted and the engine shut down, and she held her child tightly in her arms like a mother, breaking through the catastrophe and finally reaching the other side, and then gently let go of her hand.

The lander slammed into the barren land of Mars, then bounced up and rolled away with a jump, the airbags providing comprehensive protection, compressing the moment they touched the ground and absorbing the kinetic energy of the collision.

The system's computer directs the Raptor engine nozzle to deflect the direction of the Raptor's engine at the moment before it runs out of fuel, and Orion's massive body topples in the opposite direction of the lander.

“SAFE LANDING.”

Pop-ups on all monitors at the same time.

End of mock test.

Tang Yue took a step back and sat down on the chair, he exhausted all the strength of his body, a little dazed.

"It worked."

"yes, we made it." The old cat turned his head and smiled, "It really worked." ”

Tang Yue raised his head and looked at the white roof of Kunlun Station, he didn't know whether he wanted to laugh or cry, and he didn't know what to say, his eyes were inexplicably red, he wanted to get up and hug the old cat, but his limbs couldn't exert his strength, so he could only repeat in a muttered voice: "We succeeded."

Mai Dong sat quietly on the command bench of the lander and asked softly:

"Am I still alive?"

"You're still alive, girl, you're still alive."