A Novel Lidar Ceilometer: Design, Implementation and by Joshua D. Vande Hey

By Joshua D. Vande Hey

In this thesis, a brand new lidar (light detection and varying) ceilometer in a position to tracking cloud base and delicate to boundary layer aerosols is brought. the foremost to this novelty lies in its divided-lens layout that addresses a classical lidar challenge of balancing transmitter-receiver overlap and signal-to-noise ratio, in addition to a style for characterizing overlap within the laboratory. stronger sensitivity within the near-range of the device is accomplished with no compromising signal-to-noise in a layout that's basic to fabricate for vast deployment. The tool, its optical characterization, and its functionality within the box are defined. The prototype device defined the following has given that shaped the foundation of a advertisement sensor for tracking clouds and aerosols.

High-resolution, non-stop observations of clouds and aerosols are had to lessen the big uncertainties in our present figuring out in their impact on weather which were highlighted by way of the foreign Panel on weather switch. And as overseas wellbeing and fitness agencies point out starting to be public overall healthiness threats over the arriving many years due to terrible air caliber, vast aerosol tracking is needed to evaluate own publicity to and the health and wellbeing affects of anthropogenic particulates. Ground-based optical distant sensing measurements made by means of well-characterized tools, reminiscent of that defined in those pages, are severe to this.

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Extra resources for A Novel Lidar Ceilometer: Design, Implementation and Characterisation

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Based in Finland, has produced two standard ceilometer models. Their current model, the Vaisala CL31 [61] has a specified altitude range of 7,500 m [62]. This instrument, which has a coaxial, common optics design where the laser beam and receiver utilise different regions of the same lens, replaced a previous model with a similar specification, the CT25K [50], which had fully-shared common optics. Both of these instruments are based on 905 nm laser diode sources. One advantage of both the CT25K and the CL31 over the biaxial instruments of other manufacturers is good sensitivity in the near-range.

12–17, May 1997 67. O. Krasnov, H. Russchenberg, A synergetic radar-lidar technique for the LWC retrieval in water clouds, in 7th International Symposium on Tropospheric Profiling: Needs and Technologies, Boulder, CO, USA, 11–16 June 2006 References 21 68. E. O’Connor, A. Illingworth, R. Hogan, A technique for autocalibration of cloud lidar. J. Atmos. Oceanic Technol. 21, 777–786 (2004) 69. aspx 70. D. Engelbart, J. Reichardt, G. Teschke, Intercomparison of methods for determining mixing height using a new network of single-photon-counting high-sensitivity ceilometers in Germany, in Proceedings of WMO meeting, December, 2008, St.

In other work on ceilometer aerosol retrievals, Münkel et al. [85] compared ceilometer, radar, sodar, and in situ particulate measurements of the urban boundary layer. They found that PM10 (10 µm particulates) concentrations showed an essentially linear relationship to backscatter intensity measured by the lidar. This suggests that in constrained conditions particulate pollutant concentrations might be inferred from ceilometer data. In related work, Heese et al. [86] have considered the effectiveness of aerosol optical property retrieval by ceilometers, Tsaknakis et al.

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