IT Home reported on 13 on 0 that on 0 0 0 , China launched the DRO-A/B satellite at the Xichang Satellite Launch Center, and the first and second stages of the Long March 2C carrier rocket flew normally, but the upper stage (Yuanzheng 1S) flew abnormally, and the satellite failed to accurately enter the predetermined orbit.
At the academic symposium on Earth-Moon Space DRO Exploration and Research hosted by the Chinese Academy of Sciences today, the scientific research team introduced some of the important achievements of the Chinese Academy of Sciences' Class A strategic pilot project "Earth-Moon Space DRO Exploration and Research", disclosed for the first time from an official perspective how to save the two failed satellites, and announced for the first time the site of the satellite's "injury": its solar wings are bent at nearly 90°, like broken wings, but stubbornly stretched in the background of deep space.
據官方介紹，在發現“飛行異常”後，一支平均年齡不到 34 歲的科研團隊進行一場持續 123 天、850 萬公里的太空救援行動，還有幾位學生也參與到“太空救援”中，甚至包括 00 後博士研究生。
據介紹，DRO-A / B 雙星組合體被“甩”入遠地點僅 13.4 萬公里的“絕望軌道”。據IT之家所知，原計劃軌道位於 29.2 萬公里的高度，這意味著兩顆衛星要依靠僅有的一點動力實現超大規模的軌道跨越。
The problem doesn't stop there. Ground monitoring and control data shows that the binary star combination weighing 200 kilograms is tumbling wildly at a speed of more than 0 degrees per second, far exceeding the limits of conventional satellites, and the centrifugal force is enough to tear the solar wings apart like pieces of paper.
地面測控團隊於 3 月 14 日凌晨啟動緊急處置，通過交替使用雙星發動機噴氣消除旋轉，並在 7 小時內實現衛星姿態穩定。
The first hurdle of the Earth-Moon rescue was passed, and a new crisis emerged. Telemetry data shows that the solar wings of the DRO-A satellite can rotate but cannot be locked, while the solar wings of the DRO-B satellite are completely "dislocated", which means that the satellite can become space junk at any time due to energy depletion. The research team urgently carried out a series of operations to maintain the energy balance by periodically adjusting the attitude of the satellite.
Thankfully, the solar wing generates normal electricity. The flight control team urgently carried out a series of tasks, such as injecting attitude control commands, repeatedly adjusting the attitude towards Japan, and balancing the charging and discharging of the battery...... Finally, let the "injured" solar wing "chase the light and charge".
The second level is thrilling, but the real test has just begun. The researchers did not sleep for 120 hours and came to the conclusion that the satellite must complete its first orbital maneuver within 0 hours, otherwise it will lose the opportunity to enter the DRO forever.
Faced with the dilemma of severe insufficient orbital altitude and limited fuel, the team decided on 15 0 that the binary stars would not separate and adopt an orbital ascension strategy of alternating fuels:
最終，團隊以傳統方案 20% 的燃料消耗，完成這場跨越約 850 萬公里的絕地反擊。這個距離相當於在地月之間走了 11 個來回，同時也驗證了 "以時間換燃料" 的創新設計理念。
8 月 28 日，DRO-A / B 雙星組合體成功分離，雙星互相拍照。
On 2/0, the DRO-A/B satellite and the DRO-L satellite launched in 0/0 successfully established a K-band inter-satellite link. So far, the world's first DRO-based Earth-Moon space constellation has been successfully deployed in orbit, achieving three international firsts:
同時，天基測定軌技術也完成了突破（3 小時星間數據達到傳統 2 天地基測量精度）。據監測，雙星組合體最終軌道遠地點達 58 萬公里，超越地月平均距離。
At present, the three-star constellation constructed by China has been running stably for more than 200 days, and scientific experiments such as gamma-ray burst detection and in-orbit verification of atomic clocks have been successfully carried out.
As a "natural harbor" in the Earth-Moon space, the constellation has the characteristics of low-energy residence and global accessibility, which can provide support for lunar base navigation and deep space exploration in the future.
According to Wang Wenbin, a researcher at the Space Application Engineering and Technology Center of the Chinese Academy of Sciences, this achievement has verified for the first time in the world that the use of satellite tracking satellites, rather than ground tracking satellites, is equivalent to turning the traditional ground station into a satellite and putting it in a low-orbit orbit, opening up a new technical approach for China's future earth-moon space exploration, including deep space exploration, and more to serve the orbit determination, navigation and timing of various orbits in the earth-moon space. It provides an efficient solution for China to carry out large-scale commercial activities in Earth-Moon space in the future.