At 23:44 on December 27th, the Long March 4 Bingyao 35 carrier rocket ignited at the Jiuquan Satellite Launch Center and successfully sent the remote sensing 33 satellite and a micro-nano technology test satellite on board into a predetermined orbit , The launch mission was a complete success. So far, the launch mission of my country’s Long March series of carrier rockets during the 13th Five-Year Plan period has successfully concluded.
The two satellites launched this time were all developed by the Eighth Academy of China Aerospace Science and Technology Corporation. The remote sensing satellite No. 33 is mainly used for scientific experiment research, marine and land resource surveys and other tasks. The Remote Sensing 33 satellite and the micro-nano technology test satellite have become the final stars of China in 2020 and the 13th Five-Year Plan.
The Long March 4C carrier rocket for this launch mission is a normal temperature liquid three-stage launch vehicle developed by the Eighth Academy of China Aerospace Science and Technology Corporation. It has the ability to launch multiple types of satellites with different orbital requirements. Single or multi-satellite launch, its sun-synchronous circular orbit carrying capacity can reach 3 tons.
The launch of this mission was carried out at the end of the year, and the launch window was late at night. The weather conditions were extremely cold, which brought great challenges to launch preparations. Based on the experience of Long March 4B series carrier rockets in response to winter launches for many times, the test team carried out a review of 20 winter launch safeguard measures for this rocket, covering ground equipment operation, propellant refueling, star cover environmental protection, and launch conditions Guarantee and many other aspects. In the end, the rocket was successfully launched within the scheduled window, and various measures achieved the expected results.
This mission is the sixth launch mission of the Long March 4B series carrier rocket this year, and it is also the final battle of the 13th Five-Year Plan for the Long March 4 model. During the “13th Five-Year Plan” period, the Changsi B series rockets carried out 24 launches and successfully put 53 satellites into the predetermined orbits, which strongly supported the implementation of major national space projects. The above-mentioned missions were launched at three bases in Taiyuan, Jiuquan and Xichang. The rocket adopts 7 different overall configurations. The mission covers various types such as sun-synchronous orbit, low-inclination orbit, and earth-moon transfer orbit. Adaptability.
In terms of technology, the Long March 4 series of carrier rockets have made considerable progress. Through the implementation of technologies such as dual strapdown redundancy in the control system, iterative guidance, three-stage engine improvement, and telemetry image monitoring, the performance of the rocket has been further improved. Reliability: The equipped grid rudder landing zone control system and the last sub-level orbit retention application system have successfully passed the flight verification, have a good application prospect, and have accumulated valuable technical reserves for subsequent expansion of the model.
In response to the demand for high-density launches, the Long March 4B series carrier rockets continue to optimize the scientific research and production mode and development technology process, and the pilot implementation of “detasking of launch vehicles” has greatly improved the flexibility of development and production and the speed of response to tasks. The cycle is also optimized from 25 working days to 18 working days.
This launch is the 69th launch of the Long March 4B series of carrier rockets, the 126th launch of the Long March series of carrier rockets developed by the Eighth Academy of Sciences, and the 357th launch of the Long March series of carrier rockets.