China's Space Program Creates Another Miracle: Two "Doomed" Satellites Return to Lunar Orbit, Unveiling the "Perigee Kick" Technology

China's Space Program Creates Another Miracle: Two "Doomed" Satellites Return to Lunar Orbit, Unveiling the "Perigee Kick" Technology

China's Space Program Creates Another Miracle: Two "Doomed" Satellites Return to Lunar Orbit, Unveiling the "Perigee Kick" Technology

China has now firmly established itself as a major player in the global space race. After the successful launch of the "Tiangong" space station and "Chang'e-6," China has demonstrated its ambitious aspirations in the field, subtly challenging the space superpower status quo. This year, China has created another space miracle: successfully returning two satellites, previously deemed "doomed" by the US, to lunar orbit. This is considered a groundbreaking feat in the history of space exploration. So, how did China "turn the tide"? What is the story behind this "rescue operation"?

Satellite Failure, US Declares "Death Sentence"

In March this year, China launched two experimental satellites, "DRO-A/B." Ideally, these satellites were intended to reach lunar orbit, but the upper stage of the launch vehicle failed to ignite as planned, leading to a launch failure. While China refrained from public comment on the matter, the US closely monitored the situation.

After tracking the satellites, the US Space Force declared them "lost" and asserted that they were essentially "space debris," destined to burn up in the atmosphere.

Chinese Space Scientists Turn the Tide, A Miracle Occurs

However, much to the US's surprise, China, rather than giving up after the launch failure, immediately activated a backup plan and dedicated significant efforts to re-establish contact with the satellites. After a series of emergency procedures and operations, Chinese space scientists successfully "turned the tide" and returned the two satellites to orbit.

Eventually, the US confirmed that the two satellites, previously sentenced to "death" by them, were miraculously back in orbit and functioning normally thanks to the efforts of Chinese space scientists.

"Perigee Kick" Technology: The "Slingshot Effect" in Space

The successful rescue operation was no mere coincidence; it's a testament to the years of technical accumulation and innovation by Chinese space scientists. Orbit correction of satellites in space is akin to finding a needle in a haystack. Satellites move at high speed in space, reaching thousands of meters per second. Even a one-second deviation can lead to a positional difference of hundreds of kilometers. Moreover, satellites have limited energy reserves, and each orbit correction consumes considerable fuel. Balancing precise orbit correction with limited fuel resources presents an extremely challenging requirement for space technology.

Overcoming countless difficulties, Chinese space scientists successfully deployed a technique called "perigee kick" to "bring back" the two satellites. Simplified, this involves igniting the engine at the point where the satellite is closest to Earth. Using the "slingshot effect" of Earth's gravity, the satellite gains additional acceleration, enabling trajectory correction.

This technique sounds simple, but its practical application is incredibly challenging. It demands precise calculations of the satellite's trajectory, speed, and acceleration, taking into account factors like Earth's gravity and atmospheric drag. Even the slightest error can lead to mission failure. However, through their autonomous and innovative technology, Chinese space scientists have repeatedly achieved the "impossible task." They meticulously calculated and simulated each ignition, optimizing the timing and force to maximize fuel efficiency and increase the success rate.

The Significance of "Resurrection": Opening New Doors for Future Exploration

The rescue operation goes beyond merely "resurrecting" two satellites; it marks a new milestone in China's space program, opening a new door for future exploration.

These two satellites weren't ordinary. They were tasked with forming a satellite network, establishing communication between the Earth and the Moon, and connecting with the DRO-L satellite in near-Earth orbit for communication missions. In essence, this mission lays the foundation for China's future endeavors like manned lunar missions and the establishment of a lunar base.

Whether it's manned lunar missions or building a lunar base, communication is paramount. The success of Chang'e-6, with its flawless lunar landing, sampling, and return, is largely attributed to China's independently developed "Queqiao" relay satellite. Without the "Queqiao" bridge, China wouldn't even have been able to land on the lunar surface, let alone collect samples. Therefore, communication is the first crucial condition for mission success.

Now, with the return of these two satellites, they have resumed their missions. This signifies a critical step forward for China in laser communication and navigation technology. We can be immensely proud of these achievements, especially when, in the near future, Chinese astronauts leave their first footprints on the moon, becoming China's first "Armstrongs."

International Reactions and Challenges: Opportunities and Challenges Coexist

This satellite rescue operation has garnered widespread global attention. The US Space Force was particularly shocked, as they consider themselves the "space police." In their view, these two satellites were "condemned." But Chinese space scientists accomplished what they deemed impossible, forcing them to reconsider their perspective.

In fact, as China's space program continues to progress, more nations are recognizing the importance of collaboration with China. The inclusion of international payloads onboard Chang'e-4 is a prime example. Furthermore, Chang'e-6 carried payloads representing four other countries and international organizations, further captivating the international community with China's space advancements.

Moving forward, as China's space program further develops, avenues for international cooperation will expand. Whether it's lunar exploration or Mars exploration, these endeavors require collaboration from various countries to address challenges collectively.

Undoubtedly, opportunities and challenges always go hand in hand. As China's space program advances, we will face increasing competition and challenges. But China has both the confidence and the determination. Over the years, Chinese space scientists have cultivated a "steel army" capable of taking on tough tasks and winning battles. With their wisdom and hard work, they have repeatedly created miracles where none seemed possible. Moving forward, they will continue upholding this spirit, exploring the vast expanse of space and innovating in numerous fields. Let's look forward to seeing what they achieve.

Conclusion

From "Dongfanghong-1" to the "Shenzhou" spacecraft, from lunar exploration with "Chang'e" to the "Tianwen" Mars mission, China's space program has traversed an extraordinary journey. Along the way, China has tackled challenges, embraced innovation, and reached new heights. This satellite rescue operation is a microcosm of China's continued space advancement, showcasing its robust technological prowess, highlighting its autonomous innovation capabilities, and illuminating the path for future exploration.

However, this is merely the beginning. China's space program will continue to navigate the winds and waves, venturing further into the deep expanse of space. Let's join our country's progress and witness the wonders of the moon!

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