Essays about: "Extinction coefficient"

Showing result 1 - 5 of 13 essays containing the words Extinction coefficient.

  1. 1. Atmospheric Attenuation for Lidar Systems in Adverse Weather Conditions

    University essay from Umeå universitet/Institutionen för fysik

    Author : Johan Viklund; [2021]
    Keywords : Lidar; Lidar equation; Extinction coefficient; Signal attenuation;

    Abstract : In this study, the weather impact on lidar signals has been researched. A lidar system was placed with a target at approximately 90 m and has together with a weather station collected data for about a year before this study. READ MORE

  2. 2. Characterizing optical and electrical properties of monolayer MoS2 by backside absorbing layer microscopy

    University essay from Uppsala universitet/Institutionen för fysik och astronomi

    Author : Nathan Ullberg; [2020]
    Keywords : backside absorbing layer microscopy; BALM; monolayer MoS2; TMD; TMDC; 2D materials; nanomaterials; nanotechnology; refractive index; extinction coefficient; absorption coefficient; field-effect transistor; FET; semiconductors; optoelectronics; optics; raw image processing; chemical vapor deposition; CVD; in situ characterization;

    Abstract : Nanomaterials are playing an increasing role in novel technologies, and it is important to develop optical methods to characterize them in situ.  To that end, backside absorbing layer microscopy (BALM) has emerged as a powerful tool, being capable to resolve sub-nanometer height profiles, with video-rate acquisition speeds and a suitable geometry to couple live experiments. READ MORE

  3. 3. Verification of HARMONIE-AROME, ECMWF-IFS and WRF: Visibility and Cloud Base Height

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Elin Kindlundh; [2020]
    Keywords : HARMONIE-AROME; ECMWF-IFS; WRF; verification; visibility; cloud base height; HARMONIE-AROME; ECMWF-IFS; WRF; verifikation; sikt; molnbashöjd;

    Abstract : Visibility and cloud base height are two important parameters within aviation meteorology and verification of operational numerical weather prediction (NWP) models with regard to these two parameters is therefore important. Visibility is often parameterized through an extinction coefficient, which is dependent on for example liquid or ice water content, however it also depends on the humidity, precipitation intensity and particle concentration. READ MORE

  4. 4. Deriving characteristics of thin cirrus clouds from observations with the IRF lidar

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Jennifer Edman; [2019]
    Keywords : cirrus; lidar; polar regions; optical thickness; clouds; ice clouds; BSR; backscatter coefficient;

    Abstract : Cirrus clouds play an important role in radiative transfer, and thus have impact on the energy balance of the atmosphere and the climate of the Earth. Furthermore, they occur often and cover large areas globally at any time. Nevertheless, cirrus clouds are poorly studied, especially in the polar regions. READ MORE

  5. 5. Use of Satellite Data for Prediction of Weather Impact on EO-Systems

    University essay from Linköpings universitet/Institutionen för fysik, kemi och biologi

    Author : Cecilia Gullström; [2018]
    Keywords : EO-systems; Aerosols; Extinction coefficient; Satellite data; CALIPSO; EO-system; Aerosoler; Extinktionskoefficient; Satellitdata; CALIPSO;

    Abstract : To predict the performance of an electro-optical sensor system (EO-system) requires taking the weather situation into consideration. The possibility to use weather data from satellites instead of ground – and flight stations has been investigated. READ MORE