The Joint Total Solar Irradiance Monitor captures TSI from low Earth orbit, indicating new insights on solar radiation.
The Joint Total Solar Irradiance Monitor (JTSIM) onboard the Fengyun‐3E meteorological satellite has been launched successfully on 4th of July 2021. It aims at measuring the Total Solar Irradiance (TSI) from the Low Earth Orbit. The instruments on the Fengyun‐3E/JTSIM include the Digital Absolute Radiometer (DARA) from the Physikalisch Meteorologisches Observatorium, Davos and World Radiation Center (PMOD/WRC) and the Solar Irradiance Absolute Radiometer (SIAR) from the Changchun Institute of Optics, Fine Mechanics and Physics Chinese Academy of Sciences (CIOMP/CAS). The first light measurements and TSI value determined from DARA and SIAR are compared with other active missions (SOHO‐VIRGO,TSIS‐1).
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Zhu et al. (2025) studied this question.
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