Filters

20162

More filters

20192
Reset filters

Settings

Author: Freudenthaler, Volker × End date: 2019 × Start date: 2010 × search.filters.applied.f.series: EPJ Web of Conferences, Volume 119 ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Measurement of the linear depolarization ratio of aged dust at three wavelengths (355, 532 and 1064 nm) simultaneously over Barbados
    (Les Ulis : EDP Sciences, 2016) Haarig, Moritz; Althausen, Dietrich; Ansmann, Albert; Klepel, André; Baars, Holger; Engelmann, Ronny; Groß, Silke; Freudenthaler, Volker
    A ground-based polarization Raman lidar is presented, that is able to measure the depolarization ratio at three wavelengths (355, 532 and 1064 nm) simultaneously. This new feature is implemented for the first time in a Raman lidar. It provides a full dataset of 3 backscatter coefficients, two extinction coefficients and 3 depolarization ratios (3+2+3 lidar system). To ensure the data quality, it has been compared to the well characterized two-wavelength polarization lidar POLIS. Measurements of long-range transported dust have been performed in the framework of the Saharan Aerosol Long-Range Transport and Aerosol-Cloud-Interaction Experiment (SALTRACE) in the Caribbean.
  • Thumbnail Image
    Item
    Accuracy of linear depolarisation ratios in clean air ranges measured with POLIS-6 at 355 and 532 NM
    (Les Ulis : EDP Sciences, 2016) Freudenthaler, Volker; Seefeldner, Meinhard; Groß, Silke; Wandinger, Ulla
    Linear depolarization ratios in clean air ranges were measured with POLIS-6 at 355 and 532 nm. The mean deviation from the theoretical values, including the rotational Raman lines within the filter bandwidths, amounts to 0.0005 at 355 nm and to 0.0012 at 532 nm. The mean uncertainty of the measured linear depolarization ratio of clean air is about 0.0005 at 355 nm and about 0.0006 at 532 nm.