Military Technology

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 not yet automatically recognized the landing cross surface, then retreats and locks it, and then adjusts the angle and direction of the lander's ascent and descent according to the surface of the landing site to achieve precise landing.

Glancing at the leaders who were paying close attention to the screen, Wu Hao smiled and introduced: "The entire landing process is not a one-time event, but a phased regression.

It is one stage from the separation of the orbiter to the adjustment of the orbit. The seventh stage is the orbit change and the retrograde landing to a low position of one hundred meters above the moon. The eighth stage is from the one hundred meters position to the landing. "

After hearing Wu Hao's introduction, everyone started to understand. One leader immediately asked: "Why is it landing on the moon directly from space, but it is a stage of 100 meters? Isn't there any explanation? "

Before some pleasantries, the latest images were also transmitted back on the screen, whether they were the first-person images transmitted from the lander or the images transmitted from the No. 1 lander, as well as "Wangshu Qi" "No. 7" lunar surface inspection and exploration vehicle surveillance footage can be seen that the No. 7 lander landed smoothly on the lunar surface.

Bang bang bang...

It feels like watching a manned spacecraft return capsule land on the ground. It's exciting. Especially when the front lander 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 something more than ten tons landed just like that. The leaders realized what was going on and immediately started applauding. Following our lead, others accompanying us also applauded.

As you all know, there are relatively few craters and rocks under the moon. If the landing position is bad, it is likely to fall out of the crater, or the equipment may be damaged due to hitting the rocks, or the landing may be flat and cause rollover, etc. , so that’s considered an insurance policy.

"Da Wu, congratulations!" the young leader extended his hand to shake Wu Hao's hand.

About eight or seven seconds before it was still, the whole picture started to move again. The cross mark on it became smaller and smaller, and then with a burst of dust flying, the whole picture naturally became dim and still. got up.

While Wu Hao was introducing, no technical staff on site shouted. After hearing this, everyone immediately looked at the small screen, and saw that the ascending and descending screen below the small screen suddenly stopped. It was the circle and the cross in the center of the screen.

As for the seventh point, the lander will hover for a few seconds at that low altitude, using its internal camera, lidar and other detectors to detect the terrain above and draw a detailed topographic map. Then choose a more rugged location to land.

In particular, the low-definition images sent back by the "Wangshu-7" lunar surface patrol rover also allowed Xiaojia to see the spectacular scene of the lander landing from the lunar surface for the first time, and the distance was so close.

The same goes for the lunar exploration and landing process. It cannot be divided into several steps to complete backwards. Each stage does not have its own tasks and priorities.

As for why the low altitude of one hundred meters is defined, it is because the lander must reduce its landing speed to zero at that low altitude. "

And with such a sudden rush low setting, even if some errors occur during the ascent and descent of more than ten kilometers, there will be no low that cannot be adjusted for sudden rush. In this way, the entire situation will be slightly improved. Success rate of ascent and landing procedures.

Seeing the doubts on everyone's faces, Wu Hao smiled and continued to explain: "There are many reasons for setting that low level or that action.

It’s just you, other detectors in your country and detectors in other countries are also regressing in this way. "

"Thank you, leader!" Wu Hao did not say too few words of thanks, but said a complicated thank you. With our current close relationship, there is absolutely no need to say those things. Let’s leave these words to these strangers.

First of all, this is not about danger and insurance. Because during the ten minutes of ascent, descent and landing, problems may occur due to various reasons, resulting in errors in the ascent and descent speed. The altitude of one hundred meters above the ground is equivalent to a steep descent. Without it, the lander would land directly on the earth, and the possible errors would affect the landing speed and angle, causing the lander to crash. Rollover damage, etc.

Seeing the leader's inquiry, Ma Zhi explained with a smile: "Actually, the reason is very complicated. It's like when you do some simple actions, you often have a way to do it right at once. Then at that time, you won't break down the actions and the whole simple action will be broken down." The action is divided into several steps and completed at one time, which can greatly reduce the difficulty of that action and make it easier to complete.

"The lander is hovering."

Although your landing site was developed and explored by the Wangshu-7 lunar surface patrol rover, just in case something goes wrong, you still added that procedure to ensure that the lander can land safely.

Just when the many leaders and entourage at the scene, including a few reporters and guests, were confused, warm applause and cheers broke out at the scene, and all the technical staff stood up and cheered.

Hehehe...