Chang'e-6 successfully dug treasure
Intelligent sampling is one of the key links of the Chang'e-6 mission. The probe withstood the high temperature test on the back of the moon and collected lunar samples by drilling with a drill and taking samples from the surface with a robotic arm, achieving multi-point and diversified automatic sampling.
On May 3, the Chang'e-6 probe was launched and started its journey to the moon. After near-moon braking, separation of the lander and ascender combination and the orbiter and returner combination, it successfully landed in the pre-selected landing area of the South Pole-Aitken Basin on the back of the moon on June 2. From June 2 to 3, Chang'e-6 successfully completed intelligent rapid sampling in the South Pole-Aitken Basin on the back of the moon, and packaged the precious lunar back samples in the storage device carried by the ascender in a predetermined form. During the sampling and packaging process, researchers simulated the geographical model of the sampling area and simulated sampling in the ground laboratory based on the probe data transmitted back by the Queqiao-2 relay satellite, providing important support for sampling decisions and operations in various links.
Intelligent sampling is one of the core key links of the Chang'e-6 mission. The probe has withstood the high temperature test on the back of the moon. It has collected lunar samples by drilling with drilling tools and surface sampling with a robotic arm, realizing multi-point and diversified automatic sampling.
The Chang'e-6 lander was equipped with a variety of payloads, including a landing camera, a panoramic camera, a lunar soil structure detector, and a lunar mineral spectrometer, which were powered on normally and carried out scientific exploration as planned, playing an important role in scientific exploration tasks such as the detection and research of lunar surface morphology and mineral composition, and the detection of lunar shallow structure. Before the probe drilled and sampled, the lunar soil structure detector analyzed and judged the underground lunar soil structure in the sampling area, providing data reference for sampling.
The international payloads carried by the Chang'e-6 lander, such as the European Space Agency's lunar surface negative ion analyzer and the French lunar radon gas detector, worked normally and carried out corresponding scientific exploration tasks. Among them, the French lunar radon gas detector was powered on during the Earth-Moon transfer, the lunar orbit phase, and the lunar surface working phase; the European Space Agency's lunar surface negative ion analyzer was powered on during the lunar surface working phase. The Italian laser corner reflector installed on the top of the lander became a position control point that can be used for distance measurement on the back of the moon.
After the surface sampling was completed, the five-star red flag carried by the Chang'e-6 lander was successfully unfolded on the back of the moon. This is the first time that China has independently and dynamically displayed its national flag on the back of the moon. The national flag is made of new composite materials and special technology. Due to the different landing positions on the moon, the Chang'e-6 national flag display system has been adaptively improved on the basis of the Chang'e-5 mission.
Compared with the ground takeoff, the Chang'e-6 ascender does not have a fixed launch tower system, but uses the lander as a "temporary tower". Compared with the Chang'e-5 lunar surface takeoff, Chang'e-6 took off from the back of the moon and could not directly obtain ground measurement and control support. Instead, it needed to achieve autonomous positioning and attitude determination with the assistance of the Queqiao-2 relay satellite and the special sensors it carried, which made the project implementation more difficult. After the Chang'e-6 ascender ignited and took off, it went through three stages of vertical ascent, attitude adjustment and orbital injection, and successfully entered the predetermined circumlunar flight orbit.
Subsequently, the ascender will rendezvous and dock with the orbiter and returner combination waiting in the circumlunar orbit, and transfer the lunar samples to the returner; the orbiter and returner combination will fly around the moon, waiting for the right time to return for the lunar-to-earth transfer, and the returner will re-enter the atmosphere with the lunar samples near the earth, and is scheduled to land at the Siziwang Banner landing site in Inner Mongolia.
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