At this moment, time seems to pass slower, and every minute and second is a kind of torture for everyone. I am scared, but I am also looking forward to the arrival of the last moment.
At this moment, the picture transmitted back through the external camera at the bottom of the lander has shown the relevant situation of the area where the lunar scientific research station is located, including the completed communication data antenna, solar panels, and the previous lander. There is also a part of the foundation of the research station that has been printed out.
Of course, the most striking thing is the area where the landing site is located. The previous "Wangshu-2" lunar surface patrol rover made a large circle and some small circles in the landing site area. These circles are very conspicuous and can be seen from the lunar orbit.
At this moment, the external camera at the bottom of the lander also saw the circle and found the location where it was about to land. A large cross mark had appeared within a circle. This was the lander for the Lunar Cargo 2 spacecraft. The planned landing site is located not far from the No. 1 lander, about a hundred meters away, which is very close.
The reason why the plan is so close is of course because the current landing technology is relatively mature, so we dare to set the landing site so close.
On the other hand, setting the landing point so close is also conducive to the later transshipment of goods. It's too far, which is really not conducive to the transshipment of goods later. It will also occupy space at the landing site and affect the landing of the lander below.
The lander's intelligent control system has clearly captured and identified the landing cross surface, then locked it and began to adjust the angle and direction of the lander's descent according to the landing site surface to achieve a precise landing.
Glancing at the leaders who were paying close attention to the picture on the screen, Wu Hao smiled and introduced: "The entire landing process is not a one-time event, but is carried out in stages.
This is one stage from orbiter separation to orbit adjustment, the second stage is the orbit change and landing to a height of 100 meters above the moon, and the third stage is from the 100-meter position to landing. "
After hearing Wu Hao's introduction, everyone began to be puzzled. One leader immediately asked: "Why not land directly on the moon from space, but instead go to a position of 100 meters in stages? Is there any explanation for this? "
Seeing the leader asking, Wu Hao explained with a smile: "Actually, the reason is very simple. It's just like when we do some complex movements, we often can't do it right at once. Then at this time, there will be decomposition movements to break down the entire complex movements. Divide it into several steps and complete it at once, which can greatly reduce the difficulty of this action and make it easier to complete.
The same goes for the lunar exploration and landing process. It can be divided into several steps to complete. Each stage has its own tasks and priorities.
As for why this height of one hundred meters is designated, it is because the lander needs to reduce its landing speed to zero at this height. "
Looking at the doubts on everyone's faces, Wu Hao smiled and continued to explain: "There are many reasons for setting this height or this action.
First of all, it is for safety and insurance. Because during the ten-minute descent and landing process, problems may occur due to various reasons, resulting in errors in the descent speed and altitude. This height of one hundred meters above the ground is equivalent to a buffer height. Without it, if the lander lands directly on the earth, these possible errors may affect the landing speed angle, resulting in the lander crashing, rollover damage, etc. .
With such a buffer height set, even if there are some errors during the first ten kilometers of descent, there will be a height that can be buffered and adjusted. In this way, the success rate of the entire descent and landing process will be greatly improved.
The second point is that the lander will hover at this height for a few seconds, use its external cameras, lidar and other detectors to detect the terrain below, draw a detailed terrain map, and then select Land on a flatter position.
We all know that there are many craters and rocks on the moon. If the landing position is not good, you are likely to fall into the craters, or hit the rocks and cause equipment damage, or the landing will be uneven and cause rollover, etc. So this It's kind of an insurance policy.
Although our landing site was developed and explored by the Wangshu-2 lunar surface patrol rover, to be sure, we added this procedure to ensure that the lander can land safely.
Not only us, but other detectors in our country and detectors in other countries also proceed in this way. "
"The lander begins to hover."
While Wu Hao was introducing, a technician on site shouted. After hearing this, everyone immediately looked at the big screen, and saw that the falling picture on the big screen suddenly stopped. The circle and the cross in the center were exactly in the picture.
After about three or four seconds of being still, the whole picture began to move again. The cross mark below became bigger and bigger, and then with a burst of dust flying, the whole picture began to become dim and still.
Just when many of the leaders' entourage at the scene, including many reporters and guests, were confused, warm applause and cheers broke out, and all the technical staff stood up and cheered.
Bang bang bang...
The leaders finally realized what was going on, and immediately applauded. Under their leadership, others accompanying them also applauded.
"Xiao Wu, congratulations!" the leader extended his hand to shake Wu Hao's hand.
"Thank you, leader!" Wu Hao did not say too many words of thanks, but simply said thank you. With their current close relationship, there is absolutely no need to say these things. Let those words be left to those who are not very familiar with them.
Hehehe...
After some pleasantries, the latest images were also transmitted back on the screen, whether it was the first-person view image uploaded from the lander, or the image uploaded from the No. 1 lander, as well as the "Wangshu 2" From the surveillance footage on the lunar surface patrol and exploration vehicle, it can be seen that the No. 2 lander landed smoothly on the lunar surface.
In particular, the high-definition images sent back by the "Wangshu-2" lunar surface patrol rover also allowed everyone to see the spectacular sight of the lander landing from the lunar surface for the first time, and it was so close.
This feeling is as exciting as watching a manned spacecraft return capsule land on the ground. Especially when the lander finally landed on the lunar surface and the engine blew up the lunar soil, the spectacular scene was unforgettable for everyone. It was hard to imagine that this thing of more than ten tons landed like this.
(End of chapter)
