Future Long-term Measurements of Solar Spectral Irradiance by the TSIS Spectral Irradiance Monitor: Improvements in Measurement Accuracy and Stability

摘要

The TSIS Spectral Irradiance Monitor (SIM) is the next-generation space-borne spectrometer that is designed to measure twice daily the solar spectral irradiance (SSI) between 200 and 2400 nm and meet the requirements for the long-term SSI data record. Significant design improvements have been implemented over that of the firstgeneration (SORCE) SIM. Key performance advances include improved radiometric detector design, reduced uncertainties in long-term stability, and significant improvement in pre-launch calibration of absolute accuracy.