At 6:57 on July 16, Beijing time, China successfully launched the 4D 03/04 satellite (also known as the 4D High Precision 2 01 and 02 satellites) using the Long March 2C carrier rocket at the Taiyuan Satellite Launch Center .
At 6:57 on July 16, Beijing time, China successfully launched two 4D 03/04 satellites using the Long March 2C launch vehicle at the Taiyuan Satellite Launch Center. Photographed by Zheng Bin
The two satellites launched this time are two high-resolution commercial remote sensing satellites of China 4D Surveying and Mapping Technology Co., Ltd. (hereinafter referred to as China 4D ), a subsidiary of China Aerospace Science and Technology Group Corporation. Developed by the institute. Satellites mainly serve emerging markets such as urban security, real 3D, urban information models and digital agriculture, as well as traditional fields such as land surveying and mapping , disaster prevention and reduction, and ocean monitoring, providing users with delayed, high-performance spatio-temporal information services.
On April 29, 2022, the 4D high view 1 satellites 01 and 02 were successfully launched. The 04 4D high view 03 satellite is the second set of satellites of China's new generation of 4D commercial remote sensing satellite system. After the satellite is put into use, it will significantly improve the system's data collection and information service capabilities, marking the success of the first phase of the system's construction.
In May 2020, China Siwei launched a demonstration of a new generation of commercial remote sensing satellite system. The space segment plans to launch a total of 28 "16+4+8" satellites, and simultaneously build and match the ground segment (including measurement and control, reception, processing and application) based on the "4D Cloud", which can be expanded to 56 satellites according to market development.
At 6:57 on July 16, Beijing time, China successfully launched two 4D 03/04 satellites using the Long March 2C launch vehicle at the Taiyuan Satellite Launch Center. Photo by Zheng Bin
It is reported that the system will be fully completed in 2025. By then, it will have the global high return visit capability of 25 times per day, the high daily collection capability of more than 30 million square kilometers, and the emergency delivery capability within 2 hours.
The Long March 2C launch vehicle is a room-temperature liquid launch vehicle developed by the First Institute of Aerospace Science and Technology Group. In this mission, the rocket adopts a two-stage structure, with a total length of about 45 meters and a take-off mass of about 242 tons. In this mission, the Long March 2C launch vehicle provided customized "special vehicle" services, using an extended fairing with a diameter of 3.35 meters to make the satellite "ride" more comfortable.
In addition, the rocket uses efficient and simple short-term multi-star separation technology. Compared with the traditional attitude adjustment separation scheme, it has the advantages of maximizing the satellite carrying capacity and available measurement and control time, has better far-field security, reduces the support of special attitude adjustment systems, and simplifies the measurement of launch site and launch process, reducing launch costs. This launch of
is the 427th launch of the Long March series launch vehicle .
