After completing the daily communication with the earth, Pang Xuelin lay back on his position, leaned against a pillow, picked up the paper and pen beside him, and continued to calculate.

One of the two roaming cars became the bedroom of two people, and they spent half of their time in the roaming cars every day. Most of the time they could only lie down and keep their eyes closed, reducing consumption and reducing carbon dioxide output.

Watney, who was standing by, saw that Pang Xuelin was still busy, couldn't help but feel curious: "Pang, have you handed over the mathematical model you made to Wen Carter and others? The results of the supercomputing simulation show that we have a chance to persevere until the supply arrives. What are you doing now?"

Pang Xuelin said: "I'll do a backup rescue plan just in case."

“A standby rescue plan?”

Watney was slightly stunned.

Pang Xuelin said: "Vencarter and his team originally planned to send us supplies at Homan's transfer window half a year later. Now the time is half a year ahead of schedule. I am worried that the task will be so hasty and there will be problems at that time, so I will make a backup rescue plan."

"Don't be a crow's mouth. If something really happens, we will be in trouble!"

Watney was startled.

After experiencing so many things on Mars, his heart can't stand the tossing.

Pang Xuelin shrugged and gave Watney a wry smile: "I don't want this either, but I have to be careful!

In the movie "Martian Rescue", it was because the supply mission was too hasty that the final supply spacecraft exploded on its way to the air, and the ship and arrows were destroyed.

According to the nature of the system, there will most likely be problems with this supply task.

Therefore, Pang Xuelin is preparing to refer to the final rescue plan in the movie and prepare a backup plan in advance.

...

The 221st Mars Day.

Earth, Florida, Cape Canaveral Kennedy Space Center.

This is a global launch mission.

Ares Project Command will use the Nasa's space launch system (SLS) to deliver supply spacecraft to Mars.

This super rocket with a low-Earth orbit payload of 165 tons and a ground-fire transfer orbit payload of 38 tons is standing on the Kennedy Space Center's LC39a launch pad.

1.5 kilometers away from the launch pad, thousands of tourists from all over the world filled the viewing platform.

Behind the crowd, a beautiful girl wearing a CNN reporter's certificate was talking to the camera.

"Friends, good afternoon, everyone. Today we will bring you the 92nd launch mission of the SLS space launch system. According to the information we received from the front, this launch mission will use the latest deep space cargo spacecraft. The spacecraft weighs about 15 tons and can send 20 tons of payload to the earth-fire transfer orbit. It is expected that it will fly for thirteen months, and finally enter the Mars orbit on the 585th Mars day, and then conduct a soft landing on the Asidalia Plain to provide supplies to Pang and Watney. Now there are fifteen minutes left before the launch time, we will return the time to the studio, and we will witness this historic launch with you later..."

Kennedy Space Center Command and Control Room.

Vincart and Makita stood aside, watching the engineers do the final preparations before the launch.

Tian Mu said: "Cap, are you sure you are sure of it. This launch is too important. This is a rare launch window. Once it fails, the next launch window will take at least a year and a half to arrive at Mars. Pang and Watney cannot support that long. If Pang and Watney are finally buried in Mars, it may have a devastating impact on the entire Ares plan."

Vincart smiled bitterly and said, "I can't guarantee you! This mission is too urgent. The preparation time for at least half a year was shortened to one month. Equipment testing and arrow ship debugging and testing have been cancelled. I can only say that everyone has done their best. Whether the supply task can be successfully completed depends on whether God can bless Pang and Watney!"

Vincart, who always considered himself an atheist, even rarely made a cross on his chest.

Tian Mu also sighed. He knew that Vencart was telling the truth, but at the moment, he could only hope that the launch can be completed smoothly!

The launch has entered the final preparation stage!

"I am the flight commander and start checking the launch status!"

"Received, the Launch Commander checked all sites, the personnel were in place, and the system was ready!"

"Preparation before launch begins!"

“Quantitative amplitude modulation 1.”

“In place!”

“Quantitative amplitude modulation 2.”

“In place!”

“Propulsion Engineer!”

“In place!”

“Power test operation!”

“In place!”

"Starting Weather Supervisor!"

“In place!”

"Air Force Logistics Supervisor!"

“In place!”

"Guiding Engineer!"

“In place!”

“Payload test command!”

“In place!”

"Rocket Launching Supervisor!"

“In place!”

"I am the flight commander and ready to launch!"

"Start countdown, ten, nine, eight, seven, six, five, four, three, two, one, ignite!"

A ball of white smoke rose from the LC-39a launch pad, and the dazzling firelight under the rocket could be vaguely seen. The SLS rocket burst out with a deafening roar and slowly flew away from the launch pad.

"The rocket is in good condition, the spacecraft is in good condition!"

“Good balance!”

“The route is correct!”

“Altitude 1000!”

“Altitude 1500!”

"Pitch and roll maneuver begins!"

The Rockets began to turn slowly. On the big screen of the accusation center, you can see that the Rockets are flying very smoothly and everything is going well.

Crazy

There was a warm applause in the lobby of the command center, and everyone stood up and cheered and hugged.

Vincart and Tianmai looked at each other and smiled.

At this moment, an engineer's voice suddenly rang out in the command center: "The rocket was trembling abnormally, aviation control!"

The originally relaxed atmosphere at the scene became tense again.

"The onboard guidance system has taken over! The arrow body is a little swaying, and it is temporarily controllable!"

"Continue to observe!"

Vincart and Tian Mu stared at the big screen, feeling their palms sweating.

“Altitude 3000!”

"The pitch and roll maneuver is completed, and the grade will be divided in 22 seconds!"

"The tremor is intensifying!"

"The aircraft pulse signal is abnormal!"

“Ground telemetry shows a 200m deviation from the route.”

On the big screen, the rocket, which was originally flying stably inclined, began to deflect its trajectory. Then, parts continued to fall from the rocket. Accompanied by a dazzling flame, the SLS rocket and the deep-space cargo spacecraft worth hundreds of millions of dollars turned into a ball of flames and disappeared into the sky.

In the lobby of the command and control center, everyone seemed to be a duck with a chained neck, and could not say a word.

Vincart and Tianmu had a gloomy face. What they were most worried about happened.

The Kennedy Space Center Observation Deck, which was cheering before, also became silent.

...

Mars, Asidari Plain.

Pang Xuelin and Watney were roaming the car, waiting for news from the earth.

"Pang, there should be no problem with this launch, right?"

Pang Xuelin smiled bitterly and said, "Watney, you have asked me three times. No matter if there will be any problems with this launch, I have a backup plan, don't worry!"

But obviously, this comforting effect is not great, and Watney is still restless!

At this time, the computer screen of the roaming car suddenly lit up, and a line of words appeared on it.

[20:51] jpl: Xuelin, Watney, I'm sorry, the supply mission failed to launch! The rocket abnormally occurred and disintegrated during the launch.

Sure enough, it happened.

Pang Xuelin sighed in her heart, and quickly typing on the keyboard and responding to the message.
To be continued...