The Science Fiction World of Xueba

庞 "Pang, otherwise, I will leave the landing module. I drove the rover to the Schiaparelli impact crater. I used Phobos navigation on the way. There should be no deviation in the approximate position."

Pang Xuelin shook his head and said, "No, if you have enough time, you can still do it, but now you only have fifty days. As long as there is a slight deviation in direction, it may take several days to correct it. When you bring it "The carbon dioxide absorber simply couldn't support the rover to reach the Schiaparelli impact crater."

"But I took the landing module away. What about your communication with the earth? The circumferential probability deviation of the landing position of the supply module reached five kilometers, and the landing area was nearly fifty kilometers from the habitat. Without satellite navigation, you may find it difficult to find the supply module! "

Wu Pang Xuelin's brow frowned deeply.

This is indeed a big problem.

The Beacon Rover was originally designed only for short-distance travel, and did not consider the problem of long-distance travel. In addition, the perch capsule could emit radio navigation beacons, so no navigation system was installed.

In general, if you want to travel long distances on Mars, you must either use satellite guidance or use the SINS / CNS integrated navigation system.

SINS / CNS integrated navigation system is mainly composed of strapdown inertial navigation subsystem and astronomical navigation subsystem.

Strapdown inertial navigation is inertial navigation, and the core device is a laser gyroscope, but the accuracy of this navigation method will gradually diverge over time.

Astronomical navigation is to calculate the relative position between the rover and Phobos (Phytothe) for navigation.

But the accuracy of this navigation method will also have problems.

Therefore, the engineers combined strapdown inertial navigation and astronomical navigation. The strapdown inertial navigation subsystem provided the mathematical platform and position matrix to the inertial attitude attitude measurement information construction unit, and also provided the latitude and longitude information to the inertial navigation position. The survey information construction unit, the astronomical navigation subsystem transmits the inertial attitude matrix to the integrated navigation filter, and the integrated navigation filter will provide attitude and position estimation errors according to the astronomical navigation subsystem and the strapdown inertial navigation subsystem, respectively.

The accuracy of this kind of navigation is very high, almost as good as satellite navigation.

现在 But now, they do n’t even have a navigation system available, making it impossible for them to make their own.

The Mars Pathfinder Landing Module was obliterated, and if something happened to him, he would not receive any support.

And the supply tank is about how he will survive on Mars in the future. If the supply tank is not found, the trouble will be great.

Watney said: "So the Pathfinder Landing Module must remain here. We need to find a way to allow me to reach Schiaparelli within fifty days. Unfortunately, we don't have enough carbon dioxide absorbers, otherwise we only need to advance Departure, even if Ferpos's navigation accuracy is not high, but there is enough time to always reach Schiaparelli. "

Pang Xuelin stayed a while, a flash of light flashed in his head, and asked, "Wotney, what did you just say?"

"I said the Pathfinder Landing Module must be here ..."

"No, no, the next sentence ..."

"We don't have enough carbon dioxide absorbers, otherwise it's enough to start early ..."

"Yeah, why didn't I think of it, you can just leave in advance!"

Xi Pang Xuelin clapped her hands and laughed.

Wotney frowned, and said, "But we don't have enough carbon dioxide absorbers!"

Pang Xuelin haha ​​laughed: "Wotney, we are all thinking, our carbon dioxide absorber is not enough, but we have sufficient liquid nitrogen and oxygen reserves. The rover is not a habitat, the space inside the car is limited, you can wait for the car When the internal carbon dioxide content exceeds 2%, then put on the EVA spacesuit, release the air in the car, and re-pressurize with nitrogen and oxygen tubes. In this way, can you not worry about how to absorb carbon dioxide? "

"What?"

Watney's eyes lighted up and he clapped, "This idea is awesome. If that's the case, I don't even need to bring so many carbon dioxide filters!"

Pang Xuelin smiled: "It is still necessary to bring carbon dioxide. After all, this method is relatively wasteful of liquid nitrogen and liquid oxygen. If you only rely on Ferpos navigation, you can reach Schiaparelli in 80 days?"

Watney said: "This is perfectly fine!"

Pang Xuelin laughed: "Okay, then I will prepare 50 liters of liquid oxygen and 50 liters of liquid nitrogen for you, which is enough for you to use for 100 days, and the food is also fully reserved for you. You start on the 370th Mars day, the 450th Mars day reached the Schiaparelli crater. The only thing that is a pity is that you have never returned on this journey and wasted a lot of biological fertilizer! "

Wotney Haha laughed: "I'll give you enough when you get back to Earth!"

"Go!"

Uh ...

After Pang Xuelin communicated his ideas with the Ares Project Command, he was quickly recognized by the Command.

Another benefit of doing this is that once Watney has a problem during the trip, Pang Xuelin can also drive another roamer to rescue him when it is discovered by the satellite.

This kind of plan is very important for high-risk space activities.

Uh ...

Time passes day by day.

Every day, the two prepare for this long journey, and their lives become busy and orderly.

In the living cabin, tomatoes also grew up one after another. This stuff was made into ketchup by Watney. In this way, it solved the problem that the potatoes were not seasoned after eating ~ www.readwn.com ~ During the period, Pang Xuelin and Watney harvested the third season of potatoes. Due to lack of fertilizer, the yield was even less than the second season, only 180 kg.

However, as long as the supplies can be reached smoothly, Pang Xuelin can avoid worrying about food problems. Therefore, the two have no need to save food in a short time.

顺利 After the fourth season of potato planting was completed successfully, Watney finally arrived.

The 370th Mars Day!

Early in the morning, Pang Xuelin prepared roasted potatoes, a gongbao chicken fried rice, mixed a portion of tomato with only a little white sugar, and two large cups of aerospace peptide protein powder drink.

Both sat at the table in silence, and Pang Xuelin smiled, "Eat!"

Neither of them talked when they ate, but just swallowed these carbohydrate-rich foods.

Finally, Pang Xuelin toasted: "Wattney, all the way!"

"Thank you!"

Watney toasted with Pang Xuelin and drank it.

Subsequently, both of them put on an EVA space suit and exited the habitat from the airlock room 2.

前 The two were silent before the rover.

Wotney stepped forward and hugged Pang Xuelin, reached out and patted his helmet, and said, "Pang, take care, I'll wait for you on earth!"

He said, he never got back on the rover.

He Pang Xuelin didn't speak, just stood in place, watching the rover car door closed, watching the rover engine start, watching the rover drift away and disappear into the horizon.

前所未有 An unprecedented sense of loneliness swept towards Pang Xuelin.

Pang Xuelin murmured to himself: "Next, I am alone!"