EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

 Total Solar Irradiance monitored by  DARA/JTSIM : first light observations

Jean-Philippe Montillet1, Wolfgang Finsterle1, Margit Haberreiter1, Werner Schmutz1, Daniel Pfiffner1, Silvio Koller1, Manfred Gyo1, Wei Fang2, Xin Ye2, Dongjun Yang2, and Duo Wu2
Jean-Philippe Montillet et al.
  • 1PMOD/WRC, Dorfstrasse 33, 7260 Davos Dorf, Switzerland
  • 2Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

The Joint Total Solar Irradiance Monitor (JTSIM) onboard the Fengyun-3E spacecraft has been launched successfully the 4th of July 2021. It aims at measuring the Total Solar Irradiance (TSI) in 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 JTSIM experiment will use the two different types of TSI radiometers to track the stability of TSI measurements, and to better understand instrumental degradation in space. We will present results from this new experiment at first light. We will compare the measurements from DARA and SIAR over the first few months and relate them to other active missions (SOHO/VIRGO/PMO6v, SORCE/TSIS). 

How to cite: Montillet, J.-P., Finsterle, W., Haberreiter, M., Schmutz, W., Pfiffner, D., Koller, S., Gyo, M., Fang, W., Ye, X., Yang, D., and Wu, D.:  Total Solar Irradiance monitored by  DARA/JTSIM : first light observations, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-616,, 2022.