LIDAR FLS-12
Purpose of Participation
- Vertical profiles of aerosol concentrations and size distributions in the boundary layer
- Use of the above data to derive aerosol optical properties
Instrument description
The lidar FLS-12 system is a tunable laser system designed for remote sensing of the atmosphere in the VIS range of spectrum. The source of UV pumping for the dye laser is a XeCl excimer laser (308 nm). The backscattered energy is collected by a Cassegranian configured telescope. The choice of a particular wavelength depends on the type of dye used.
| Species | Aerosol (vertical profiles) |
| Method | The backscattered signal from various distances is registered by separate channels of multichannel (8 channels) photoreceiver. |
| Quantity primary | Backscatter and extinction coefficients |
| Quantity secondary | For spherical particles :index of refraction (real + imaginary part); mean particle size; size distribution |
| Spectral range | 400 - 657 nm |
| Altitude range | 700 m |
| Vertical resolution | 7.5 m |
| Temporal resolution | 50 ns |
| Operation | No precipitation |
| Precision | 30-50% |
| Data availability (during campaign) | Weekly |
| Final availability (after campaign) | Three months |
Specific remarks
- Combined measurements with laser particle counters and sunphotometers as well as during the airplane overflights.
References
Potter J. 1987, Two-frequency lidar inversion technique, Appl. Opt., 26 (7), 1250-1256.
Zielinski T., Zielinski A., 2002, Aerosol extinction and aerosol optical thickness in the atmosphere over the Baltic Sea determined with lidar, Journal of Aerosol Science, 33(6), 47-61.