A session devoted to optical calibration was held at the 2004 CEDAR workshop. TIDI calibration procedures do not require absolute intensity information to extract line of sight Doppler motion. However, day-to-day relative intensity variations and channel-to-channel intensity changes are required to produce a reliable TIDI product. Also, long term monitoring of the space-borne interferometer is necessary to incorporate any detector or etalon drift dependence. See Presentation
