Typical measurement
Figure 1. A typical day of ODS measurements in cloud free conditions at Ouagadougou, Burkina Faso, on 12 November 2004, when the aerosol optical depth was about 0.5. Displayed are the signals of the two channels (red channel in red, blue channel in blue) at the output of the logarithmic amplifier (0.86 volt equivalent to a flux change of one decade) and the color index (thin grey line) derived from the ratio between the two channels.
Figure 2. Similar to Figure 1, but for ODS measurements in cloud free conditions at Ouagadougou, Burkina Faso, on 26 November 2004, when the aerosol optical depth was about 3.
Palaiseau, France, 2004-2005
Ougadougou, Burkina Faso, 2004-2005
Ougadougou, Burkina Faso, 2005-2006
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