Total Solar Irradiance Recorded by the FY3E/DARA-JTSIM Radiometer
Description
Since 1978, space instruments have measured Total Solar Irradiance (TSI) to track variations in the Sun's energy output. One of the latest missions contributing to this effort is the FY-3E satellite, launched in July 2021. It carries the Joint Total Solar Irradiance Monitor (JTSIM), which includes the Digital Absolute Radiometer (DARA)—a precision instrument developed by PMOD/WRC to measure TSI with high accuracy.
A high precision and accurate measurement record of the spectrally-integrated TSI arriving at the top of the atmosphere is essential to understand both the energy balance of the Earth's climate system and the impact of TSI variations on decadal and centennial timescales. TSI is defined as the value of the integrated solar energy flux over the entire spectrum arriving at the top of the terrestrial atmosphere at the mean Sun-Earth distance of 1 AU (the astronomical unit, AU). These measurements are critical inputs to help understand the effects of solar variability on climate.
This dataset is the JTSIM-DARA dataset with a 6 hr sampling rate. It is periodically updated.
Data access
To access this dataset, please visit the AstroMaterials page. The data is preserved on that platform and made available for dissemination here.
Learn more
To learn more about this dataset, please check the publications below:
- The Fengyun-3E/Joint Total Solar Irradiance Absolute Radiometer: Instrument Design, Characterization, and Calibration
-  Total Solar Irradiance monitored by  DARA/JTSIM : first light observations
- Assessment of Solar Variability Through the Analysis of TSI Observations Recorded by the FY3E/JTSIM/DARA Radiometer
Notes (English)
Note that before 01.01.2025, the dataset is refered to the v1.0. (https://doi.org/10.5194/egusphere-egu22-616; https://doi.org/10.22541/essoar.170365223.34450405/v1 )
The new version v2.0 is associated with 10.22541/essoar.174344688.80517698/v1
