ASCOS-OOTI-MAXDOAS-BrO01

MAXDOAS instrument sampling rate was between 5 and 15 minutes depending on the light conditions. Multi-Axes Differential Optical Absorption Spectrometer build by University of Heidelberg, Germany around Ocean Optics USB 2000 spectrometer was used to record solar spectra at elevation angles of 0, 2, 5, 10 and 20 degrees. Data collected were investigated for BrO, oxygen dimer O4, NO2 and HCHO trace concentrations.

Results are included in ASCOS-OOTI-DOASBrO01.cvs file. The first column contains elevation angle of the instrument telescope (0 means horizontal position; the second Solar Zenith Angle, the third one is Date (DD/MM/YYYY). UTC time of the beginning of measurement interval (up to 15 minutes) as HH:MM:SS is included in the forth column; the fifth column contains RMS error of the simulated result with respect to the original spectra; the sixth one Differential Slant Column Density of BrO (molecules per square cm) with respect of each elevation cycle zenith measurement; Differential Slant Column Density of oxygen dimer O4 (molecules per square cm).

NO2 and HCHO concentrations were bellow the de tection limit during the sampling campaign.