Statistics – Methodology
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mst...........e&link_type=abstract
Masters Thesis, INPE-7254-TDI/697
Statistics
Methodology
6
Broadband, Narrowband, Solar Radiation, Ultraviolet Radiation, Optical Thickness, Ultraviolet Spectrophotometers, Brazil, Bolivia, Chile
Scientific paper
The National Institute for Space Research (INPE), operates a network of solar ultraviolet B (UV-B) radiation meters, at ground level, since the 1990's, at sites in Brazil, Bolivia, Chile and Antarctica. The ultraviolet meters are broadband meters (UV-Biometer), and narrowband meters (Ground-based Ultraviolet Radiometers, Brewer Ozone Spectrophotometers). Several analyses of UV-B radiation are presented, with emphasis on a methodology derived from Langley's method to calculate the atmospheric total optical depth in the UV-B. This methodology was then applied to global radiation data measured by the Brewer spectrophotometer. The total optical depths obtained with global radiation were compared with total optical depths obtained with direct radiation data, also measured by the Brewer spectrophotometer, with good match. The methodology to calculate optical depths was then tested also for UV-Biometer data, although these do not follow the Langley requirements. The results obtained with UV-Biometer data for total optical depth were in good agreement with optical depths calculated from the Brewer data, at 310 and 320 nm.
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