REMOTE SENSING OF ATMOSPHERIC CONSTITUENTS AND THE MULTI-FUNCTION SPECTROPHOTOMETER

A multi-functional solar and skylight spectrophotometer has been developed for the study of atmospheric constituents and aerosols.The instrument and its performance are described.Due to telescope structure and lock-in amplification technique adopted,the sensitivity of the instrument is high enough to conduct direct sun moon and twilight measurement for several atmospheric species and the degree of polarization and intensity observation for sky light.From measured results,the total column abundance of atmospheric species and theoptical characteristics of aerosol can be retrieved.In this paper,the daily averaged column abundance of O3 measured in Beijing by direct sun was compared with Dobson spectrophotometer nearby.The two did not show significant difference.