Brewer Spectromerter


The Brewer Mk III Spectrophotometer provides high accuracy measurements of UVA, UVB, UVE, total column Ozone and Sulphur Dioxide (SO2). Some aerosol properties (Aerosol Optical Depth) can also be derived from the data. Using Umkehr method, profiles of ozone from surface to 50 km can also be obtianed using sun’s occulation (typically during sunrise and sunset times). This system is installed in Sep.2014. It operates in the wavelegth ranging from 286.5 to 363 nm with wavelength resolution of 0.6 nm, wavelength stabilty of ±0.01 nm, wavelength precision of 0.006 nm (±0.002 nm) per step. Ozone and SO2 are measured in the wavelengths of 303.2, 306.3, 310.1, 316.8 and 320.1 nm. Direct sun is viewed through UV-quality quartz window. Coloumn ozone is measured with accuarcy of ±1%.