SORCE Solar Spectral Irradiance Monitor Data Release V24, and a Look Forward to V25

The Spectral Irradiance Monitor (SIM) onboard the Solar Radiation and Climate Experiment (SORCE) mission has been taking daily Solar Spectral Irradiance (SSI) measurements from low-earth orbit (400 miles) since April 2003. We present the latest data release from SORCE-SIM, focusing on the improvements in the new (May 2018) Version 24 (V24) data release.

V25 of the SORCE-SIM data release is on schedule for 2019 and includes enhancements to the time and temperature dependencies of the prism and diode degradation corrections. We discuss the V24 and V5 improvements through a comparison of the SSI over the overlapping wavelengths for SORCE-SIM and SORCE-SOLSTICE. Finally, we compare SORCE SSI measurements to those from the Total and Spectral Solar Irradiance Sensor (TSIS-1), which has been operating on the International Space Station (ISS) since March 2018.