Authors: Greg Kopp, George Lawrence, Gary Rottman
The SORCE Total Irradiance Monitor (TIM) is continuing the 25-year record of space-borne total solar irradiance (TSI) measurements, providing the primary external radiative forcing of the Earth’s lower troposphere. The TIM has been acquiring data since early March of 2003. The instrument has low noise and shows very little sign of degradation to date. The measured TSI values are 0.3% lower than other currently-flying instruments, but show good self-consistency and agree well with relative changes in TSI. I will give an overview of the TIM performance and data availability.