Title: The Total Irradiance Monitor for Future Solar Measurements
Author: Greg Kopp
Affil: Univ. of Colorado Laboratory for Atmospheric and Space Physics
Email: Greg.Kopp@LASP.Colorado.edu
Authors: George Lawrence, Gary Rottman
Affils: CU/LASP
Abstract: We present an overview of the Total Irradiance Monitor (TIM), a total solar irradiance (TSI) instrument designed to achieve a relative standard uncertainty (1 
accuracy) of 100 parts per million (ppm) and a precision and long-term uncertainty of 10 ppm/year. This instrument is one of four on the Solar Radiation and Climate Experiment (SORCE, http://lasp.colorado.edu/sorce), a satellite mission scheduled for launch in July of 2002. The TIM will report four TSI measurements daily, continuing a 22-year record of solar irradiance through SORCE’s goal 5-year mission life. The instrument is currently in its final stages of assembly and calibration at the University of Colorado.