131 / 2023-09-20 20:34:50

Attenuation analysis of the Solar Spectral Irradiance Monitor in 300nm-700nm

Solar Spectral Irradiance Monitor,Solar monitoring,decay model,Model corrections

Special Sessions > SS17 - Principles, methods and applications of photoelectron spectroscopy analytical instruments

During the long-term monitoring of the sun by the Solar Spectral Irradiance Monitor in orbit, the optical system itself suffers from the decay of transmission efficiency by solar irradiation, thus affecting the high-precision monitoring of the sun. In this paper, based on the monitoring data of FY-3E Solar Spectral Irradiance Monitor in orbit for nearly two years, we analyze the actual transmission efficiency changes of each part of the optical system in the visible band of 300nm-700nm, and give the model of the instrument's decay law. The model is used to correct the actual solar monitoring data, thus giving the relative change rule of the sun in the visible wavelength band. Comparison with the international similar instruments, the sun in the band of the law of change is consistent, the magnitude of the slight difference.