The Total and Spectral Solar Irradiance Sensor-1 (TSIS-1) Hybrid Solar Reference Spectrum (HSRS) is a new solar irradiance reference spectrum.

TSIS-HSRS spectrum is developed by applying a modified spectral ratio method to normalize very high spectral resolution solar line data to the absolute irradiance scale of the TSIS-1 Spectral Irradiance Monitor (SIM) and the CubeSat Compact SIM (CSIM)

The TSIS-1 HSRS spans 202 nm to 2730 nm at 0.01 to 0.001 nm spectral resolution with uncertainties of 0.3% between 460 and 2365 nm and 1.3% at wavelengths outside that range.

【References】
Coddington, Odele M and Richard, Erik C and Harber, Dave and Pilewkie, Peter and Woods, Thomas N. and Chance, Kelly V. and Liu, Xiong and Sun, Kang, The TSIS-1 Hybrid Solar Reference Spectrum, Earth and Space Science Open Archive, pages.14, 2021, 10.1002/essoar.10506142.2,
https://doi.org/10.1002/essoar.10506142.2