This project is executed between April 1, 2004 to December 31, 2004. In all, following results are obtained:  Detailed recording of instrument operation output to set up reliable calibration procedure, and the SOP (stand operation procedure) of Calibration procedure;  To maintain a third-level working standard;  Close contact with EPA to exeute the calibration task;  Set up a reliable calibration system and QA/QC operational procedure;  Calibrate of all on-site UVI instrument, and additional to help EPA to calibrate of all new “Kipp & Zonen” UVI instrument;  Compare the calibration result, and set up a QA/QC operational procedure on site;  Up-date regularly the forecasting parameters based on observational data.  Collect international information;

UVI, calibration, SOP