First of all, congratulations to the Chang'e-6 complex on its successful soft landing on the far side of the Moon! After the successful landing, the solar panels are naturally deployed, the orientation and inclination of the assembly itself are measured, and the temperature and light intensity of the environment on the far side of the moon are changed, and these valuable data are quickly transmitted back to the command center through the Queqiao-2 relay satellite. Then through the Queqiao to receive the command center instructions, to achieve a variety of payload self-test start-up. After all is successfully completed, within 48 hours, it is time to start in-situ sampling at the landing site, and complete the initial sample encapsulation, laying the foundation for the ascender to carry the sample up and docking, and then return to Earth smoothly. The lunar surface sampling process of the Chang'e-6 assemblage is similar to that of Chang'e-4. It's just that it's done fully automatically on the far side of the moon, which is more technically difficult. The reason why it is said to be in situ sampling. The various operational equipment, which mainly consists in sampling, do not need to leave the assemblage itself, which has a stable attitude after a successful landing.
Only a drill pipe with a complex structure needs to extend down from the inside of the assemblage for sampling; There is also a small robotic arm that can move 180 degrees from the top. After the two samples are taken, the samples are transported to the sealing device and the initial sealing is completed. In the whole process of sampling, the combination of more than 2 tons of self-weight itself no longer makes obvious displacement, just like the car crane before lifting the heavy object, first fix itself, and then go down the drill rod; At the same time, the 180-degree sampling robotic arm like the boom is released. The whole assembly itself is a fixed bracket for all sampling actions, so it is called in-situ sampling. In fact, there are three categories of lunar samples to be sampled: the first is that the drill rod for downward exploration should be drilled into about 3 meters below the lunar surface in principle, just like the Luoyang shovel, and the samples will be directly stored in the original spline according to the depth and original hierarchical structure, and transported back to the earth for analysis; the second is a rotating sampling robotic arm that shovels the lunar soil at a depth of a few centimeters on the lunar surface.
The last item is to use the small gripper-type pliers on the robotic arm to directly grasp the small exposed and visible moon rock that is no more than the size of a ping-pong ball. Therefore, not only the deep and superficial lunar soil was retrieved, but also a small amount of lunar rock. The total sample volume is planned to be slightly more than 2 kilograms measured by Earth. The actual recovery of Chang'e 4 was only more than 1,730 grams, mainly because the drill bit part only hit more than 1 meter down, and it was stuck by the hard moon rock hidden below, and did not dare to force it down, so it did not return with a full load. It is hoped that this sampling will be able to hit directly to a depth of 3 meters. In fact, there is a small bug in this process, that is, through 4 consecutive successful soft landings from Chang 3 to Chang 6, it will be found that about 2 seconds before the combination touches the lunar surface, there will be a jet stream of 7500 N main engine that will instantly blow part of the lunar soil on the lunar surface; Then the lunar lander also landed directly above the partially blown position. And Chang 4 and the current Chang 6 are also partially,
Sampling of the position of the blowing. In principle, this slightly affects the effectiveness of in-situ sampling. Of course, it only affects the lunar soil taken by the robotic arm on the lunar surface, and basically does not affect the depth samples drilled and the lunar rock grabbed. The main reason is that the moon cooled and froze 3 billion years ago. This was followed by 3 billion years of solar winds and the fall of various alien objects. The surface of the moon is equivalent to the desktop that has been dusting for 3 billion years; At the moment of the falling moon, the 7500 N engine still did not completely shut down, and when it was blown on the dust tabletop and then sampled, there would be a little interference. Helium-3, as it is often called, is basically stored in the most superficial layer of lunar soil. Unless a special lunar sampling rover is allowed to walk 100 meters away from the main lunar lander and then take samples without interference on site. But this will have to wait until Chang 7 later. But the problem is obviously not big, and the high-precision analysis of the sample after returning to Earth will automatically rule out this inevitable disturbance. Say a thousand things and ten thousand, the lunar samples retrieved by the Chang'e series are 100% fidelity,
It is 100 million times better than a few major countries taking the Antarctic lunar meteorite and grinding it to cheat; I don't even bother to cheat on meteorites, and I dare to give it as a so-called national gift if I pinch it directly from the flower pot in the laboratory corridor, which is not only a loss of character, but also a defeat of the national fortune!