On February 2 at 15:51, China successfully launched the "Zhang Heng No. 1" electromagnetic monitoring test satellite from the Jiuquan Satellite Launch Center using the Long March II rocket. The satellite was placed into its designated orbit, marking a significant milestone for China in the field of geophysical research. This achievement places China among the few nations globally with high-precision geophysical field exploration satellites in operation.
According to the National Defense Science and Technology Bureau and the China National Space Administration, "Zhang Heng No. 1" is a new national civil aerospace scientific research satellite, serving as the first in China's geophysical field exploration satellite program. It is designed to monitor various physical phenomena, including the global electromagnetic field, ionospheric plasma, and high-energy particle sedimentation. These observations will aid in seismic mechanism studies and space environment monitoring, while also offering new technological approaches for Earth system research.
Zhao Jian, deputy director of the Systems Engineering Department at the National Defense Science and Technology Bureau, emphasized that "Zhang Heng No. 1" features wide coverage, excellent electromagnetic conditions, strong dynamic information capabilities, and no geographical limitations. The satellite's advanced design allows it to collect critical data for scientific exploration.
The project was approved in 2013 by the National Defense Science and Technology Bureau and the Ministry of Finance. Developed by the China Aerospace Science and Technology Corporation's Fifth Academy, Aerospace Dongfanghong Satellite Co., Ltd., and the Shanghai Aerospace Technology Research Institute, the satellite was launched and tracked by the China Satellite Launch Measurement and Control System. The application system was built and operated by the China Earthquake Administration.
Zhou Feng, director of Aerospace Dongfanghong Satellite Co., Ltd., highlighted that "Zhang Heng No. 1" is equipped with eight different payloads, including a high-precision magnetometer, plasma analyzer, and high-energy particle detector. Notably, it also carries Italian high-energy particle detectors, which complement the Chinese-developed instruments for enhanced joint detection.
Shen Xuhui, chief scientist of the electromagnetic monitoring test satellite project, noted that the overall technical performance of "Zhang Heng No. 1" has reached international advanced levels, with some indicators even leading globally. The satellite represents several domestic "firsts," such as the first high-precision electromagnetic cleanliness control for low-Earth orbit satellites, filling a gap in China’s space-based science detection capabilities. Its high-precision magnetometers and inductive magnetometers are expected to capture valuable global geomagnetic data.
In addition to "Zhang Heng No. 1," the mission also included the launch of six domestic and foreign microsatellites, including the "Junior Star One." This educational satellite is the first of its kind in China, born from the creativity and aspirations of over 100,000 primary and secondary school students. Schools and educational institutions across the country with satellite monitoring and control stations can use "Junior Star One" data for aerospace science education, making space exploration more accessible and inspiring future generations.
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