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ZEREN ZHIMA, HUANG Jianping, YANG Yanyan, YAN Rui, LIN Jian, ZHANG Zhenxia, CHU Wei, LIU Dapeng, YANG DeHe, XU Song, LU Hengxin, WANG Jie, HUANG He, HU Yunpeng, TAN Qiao, LI Wenjing, ZHOU Na. High-precision In-orbit Calibration Technology for the CSES-01 Geophysical-field-detection Satellite (in Chinese). Chinese Journal of Space Science, 2026, 46(5): 1-17 doi: 10.11728/cjss2026.05.2026-0023
Citation: ZEREN ZHIMA, HUANG Jianping, YANG Yanyan, YAN Rui, LIN Jian, ZHANG Zhenxia, CHU Wei, LIU Dapeng, YANG DeHe, XU Song, LU Hengxin, WANG Jie, HUANG He, HU Yunpeng, TAN Qiao, LI Wenjing, ZHOU Na. High-precision In-orbit Calibration Technology for the CSES-01 Geophysical-field-detection Satellite (in Chinese). Chinese Journal of Space Science, 2026, 46(5): 1-17 doi: 10.11728/cjss2026.05.2026-0023
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High-precision In-orbit Calibration Technology for the CSES-01 Geophysical-field-detection Satellite

doi: 10.11728/cjss2026.05.2026-0023 cstr: 32142.14.cjss.2026-0023

  • National Institution of Natural Hazards, Ministry of Emergency Management of the People’s Republic of China, Beijing 100085

  • Received Date: 2026-01-28
  • Rev Recd Date: 2026-06-28
    • Available Online: 2026-06-29
    Abstract
  • This study focuses on the data calibration challenges of eight types of payloads in four major categories (electromagnetic field, in-situ plasma, energetic particles, and ionospheric structure) carried by the China Seismo-Electromagnetic Satellite (CSES-01, also known as Zhangheng-1), The in-orbit full-chain calibration system for electromagnetic satellite data has been established. Vertically, this system achieves precise end-to-end validation from “raw signals to physical quantities and then to data products” for each payload. Horizontally, it conducts multidimensional cross-validation among payloads, satellites, and ground-based observations, as well as between models and measurements. Overall, the validated data from CSES-01 have reached an internationally advanced level, with some indicators leading globally. The frequency resolution of electromagnetic fields (0.45 Hz), as well as the flux (0.01 MeV) and pitch angle (5°) resolution of high-energy particles, outperform those of DEMETER and POES; the magnetic field accuracy (better than 1 nT) and plasma relative accuracy (better than 10%) are comparable to those of the Swarm satellites; the instrument bias accuracy of the GNSS occultation receiver is comparable to that of COSMIC. The magnetic field data have become an important data source for international models such as IGRF and CHAOS-8. This on-orbit validation technology system establishes a proprietary technical framework in the field of electromagnetic satellites, and has been successfully applied to the data production of the CSES-01 satellite and has driven engineering improvements for the CSES-02 satellite, significantly enhancing satellite observational performance. The validated data products have been applied to earthquake monitoring and space weather research, laying a key technological foundation for China’s transition from “catching up” to “keeping pace” and even “leading” in related technological domains.

     

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