Filters: Tags: Mount Pagan (X)
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On 6 April 2014, a Differential Optical Absorption Spectroscopy (DOAS) instrument was used to measure the radiance of scattered solar radiation passing through the plume emitted from Mount Pagan volcano, Mariana Islands. Spectra were recorded in the ultraviolet (UV: 240 – 390 nm) wavelength range at 0.6 nm resolution. A scanner was used to scan the spectrometer's viewing direction vertically through the volcanic plume. The scanner was located at 18.1235N, 145.7608E and aimed directly to the north (0 degrees azimuth). It scanned the spectrometer's viewing direction from 1 to 90 degrees elevation in steps of 1 degree. The plume was encountered at about 15 to 20 degrees elevation. The scanner was held at each position...
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