https://atmos.meteo.uni-koeln.de/ag_crewell/ 2026-05-18T18:47:43+00:00 https://atmos.meteo.uni-koeln.de/ag_crewell/ https://atmos.meteo.uni-koeln.de/ag_crewell/lib/exe/fetch.php?media=wiki:logo.png text/html 2025-11-17T16:44:33+00:00 Anonymous (anonymous@undisclosed.example.com) https://atmos.meteo.uni-koeln.de/ag_crewell/doku.php?id=instruments:current_data&rev=1763397873&do=diff Current Data from JOYCE The following table shows current images and a short description of the measurement. Clicking on the image brings you to a page for every instrument with further data. Main purpose of these pages is to control whether the instruments work properly. The data shown are mainly preliminary and not quality controlled. text/html 2024-04-16T08:09:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://atmos.meteo.uni-koeln.de/ag_crewell/doku.php?id=instruments:instruments&rev=1713254967&do=diff Instruments operated by RG Integrated Remote Sensing AERI The Atmospheric Emitted Radiance Interferometer (AERI) measures downwelling infrared radiation from 3-25 µm at less than one wavenumber resolution to derive profiles of tropospheric temperature and humidity. It is also sensitive cloud properties and CO2. text/html 2021-01-22T21:17:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://atmos.meteo.uni-koeln.de/ag_crewell/doku.php?id=instruments:mwr_references&rev=1611350234&do=diff References on MWR Overview Articles and Books Bohren C. F. and D.R. Huffman, 198s: Absorption and Scattering of Light by Small Particles, New York, John Wiley. Bohren, C. F. and E. Clothiaux, 2006: Fundamentals of Atmospheric Radiation: An Introduction with 400 Problems, Physics Textbook, Wiley-VCH, 472 pp. text/html 2024-05-03T10:26:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://atmos.meteo.uni-koeln.de/ag_crewell/doku.php?id=instruments:ramanlidar&rev=1714731974&do=diff Raymetrics Raman Lidar Mentor: N.N. Principle The Raymetrics raman lidar provides continuous (24/7), unattended day and night temperature, water vapor, backscatter coefficient and extinction profiling within the atmospheric boundary layer, through the entrainment zone and into the free troposphere, at a fixed location. text/html 2021-10-01T19:32:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://atmos.meteo.uni-koeln.de/ag_crewell/doku.php?id=instruments:wind_lidar&rev=1633116761&do=diff Doppler Lidar Mentor: J.H. Schween The instrument is a Streamline XR from HALO Photonics (Worcestershire, Great Britain) instrument nr.17 build in 2010. Principle The backscattered light from an emitted laserbeam is used to measure wind speed. Analysis of doppler shift gives wind speed along the beam. Combination of several beams allows an estimate of the three components of the wind vector. Amount of received backscattered light allows calculation of backscatter coefficient.$\mu$$^{-1}$$^…