World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Validation of Spectral Sky Radiance Derived from All-sky Camera Images – a Case Study : Volume 7, Issue 1 (10/01/2014)

By Tohsing, K.

Click here to view

Book Id: WPLBN0004000265
Format Type: PDF Article :
File Size: Pages 29
Reproduction Date: 2015

Title: Validation of Spectral Sky Radiance Derived from All-sky Camera Images – a Case Study : Volume 7, Issue 1 (10/01/2014)  
Author: Tohsing, K.
Volume: Vol. 7, Issue 1
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Seckmeyer, G., Riechelmann, S., Tohsing, K., & Schrempf, M. (2014). Validation of Spectral Sky Radiance Derived from All-sky Camera Images – a Case Study : Volume 7, Issue 1 (10/01/2014). Retrieved from

Description: Institut für Meteorologie und Klimatologie, Leibniz Universität Hannover, Herrenhäuser Straße 2, Hanover 30419, Germany. Spectral sky radiance (380–760 nm) is derived from measurements with a Hemispherical Sky Imager (HSI) system. The HSI consists of a commercial compact CCD (charge coupled device) camera equipped with a fish-eye lens and provides hemispherical sky images in three reference bands such as red, green and blue. To obtain the spectral sky radiance from these images non-linear regression functions for various sky conditions have been derived. The camera-based spectral sky radiance was validated by spectral sky radiance measured with a CCD spectroradiometer. The spectral sky radiance for complete distribution over the hemisphere between both instruments deviates by less than 20% at 500 nm for all sky conditions and for zenith angles less than 80°. The reconstructed spectra of the wavelength 380 nm to 760 nm between both instruments at various directions deviate by less then 20% for all sky conditions.

Validation of spectral sky radiance derived from all-sky camera images – a case study

Blumthaler, M., Grübner, J., Huber, M., and Ambach, W.: Measuring spectral and spatial variations of UVA and UVB sky radiance, J. Geophys. Res., 23, 547–550, 1996.; Ansko, I., Eerme, K., Lätt, S., Noorma, M., and Veismann, U.: Study of suitability of AvaSpec array spectrometer for solar UV field measurements, Atmos. Chem. Phys., 8, 3247–3253, doi:10.5194/acp-8-3247-2008, 2008.; Bener, P.: Der Einfluß der Bewölkung auf die Himmelsstrahlung, Theor. Appl. Climatol., 12, 442–457, doi:10.1007/BF02242986, 1963.; Cordero, R. R., Seckmeyer, G., Pissulla, D., and Labbe, F.: Uncertainty of experimental integrals: application to the UV index calculation, Metrologia, 45, 1–10, 2008.; Czibula, G. and Grundmann, O.: Skyscanner – Gerätebeschreibung, Czibula and Grundmann Engeneering GbR, Berlin, 2002.; Dahlback, A.: Measurements of biologically effective UV doses, total ozone abundances, and cloud effects with multichannel, moderate bandwidth filter instruments, Appl. Optics, 35, 6514–6521, 1996.; Deering, D. W. and Eck, T. F.: Atmospheric optical depth effects on angular on anisotropy of plant canopy reflectant, Int. J. Remote Sens., 8, 893–916, 1987.; Dorno, C.: Studie über Licht und Luft des Hochgebirges, Vieweg und Sohn, Braunschweig, 1911.; Dubovik, O. and King, M. D.: A flexible inversion algorithm for retrieval of aerosol optical properties from Sun and sky radiance measurements, J. Geophys. Res.-Atmos., 105, 20673–20696, 2000.; Feister, U., Shields, J., Karr, M., Johnson, R., Dehne, K., and Woldt, M.: Ground-based cloud images and sky radiance in the visible and near infrared region from whole sky image measurement, in: EUMETSAT Satellite Application Facility Workshop, German Weather Service and World Meteorological Organization, 79–88, 2000.; Hernández-András, J., Romero, J., and Lee, J. R. L.: Colorimetric and spectro-radiometric characteristics of narrow-field-of-view clear skylight in Granada, Spain, J. Opt. Soc. Am., 18, 412–420, 2001.; Huber, M., Blumthaler, M., Schreder, J., Schallhart, B., and Lenoble, J.: Effect of inhomogeneous surface albedo on diffuse UV sky radiance at a high-altitude site, J. Geophys. Res., 109, 1–9, 2004.; Huo, J. and Lu, D.: Calibration and validation of an All–Sky Imager, Atmos. Oceanic Sci. Lett., 2, 220–223, 2009.; Iqbal, M.: An Introduction to Solar Radiation, Academic Press, Canada, 1983.; Johnsen, B., Kjeldstad, B., Aalerud, T. N., Nielsen, L. T., Schreder, J., Blumthaler, M., Bernhard, G., Topaloglou, C., Meinander, O., Bagheri, A., Slusser, J. R., and Davis, J.: Intercomparison and haromonization of UV index measurments from multiband filter radiometers, J. Geophys. Res., 113, 1–9, 2008.; Kouremeti, N., Bais, A., Kazadzis, S., Blumthaler, M., and Schmitt, R.: Charge-coupled device spectrograph for direct solar irradiance and sky radiance measurements, Appl. Optics, 47, 1594–1607, 2008.; Kreuter, A. and Blumthaler, M.: Stray light correction for solar measurements using array spectrometers, Rev. Sci. Instrum., 80, 096108, doi:10.1063/1.3233897, 2009.; Lenoble, J.: Atmospheric Radiative Transfer, Deepak Publishing, Hampton, 1993.; Liou, K. N.: An Introduction to Atmospheric Radiation, Academic Press, Orlando, 2002.; Li, Z., Goloub, P., Blarel, L., Damiri, B., Podvin, T., and Jankowiak, I.: Dust optical properties retrieved from ground-based polarimetric measurements, Appl. Optics, 46, 1548–1553, 2007.; López-Álvarez, M. A., Hernández-Andrés, J., Romero, J., Olmo, F. J., Cazorla, A., and Alados-Arboledas, L.: Using a trichromatic CCD camera for spectral skylight estimation, Appl. Optics, 47, H31–H38, 2008.; Lütjohann, H.: The stepwise regression algorithm seen from the statistician's point of view, Metrika, 15, 110–125, 1970.; Milton, E. J. and Rollin, E. M.: Estimating the irradiance spectrum from measurements


Click To View

Additional Books

  • A Comparison of Rainfall Measurements fr... (by )
  • Sources of Uncertainty in Eddy Covarianc... (by )
  • Real-time Profiling of Organic Trace Gas... (by )
  • Potential of Airborne Lidar Measurements... (by )
  • Validation of Two Independent Retrievals... (by )
  • Nitrous Oxide Emissions from Managed Gra... (by )
  • Light Extinction by Secondary Organic Ae... (by )
  • An Intercomparison of Gc-fid and Ptr-ms ... (by )
  • Laboratory-generated Primary Marine Aero... (by )
  • High-resolution Measurements from the Ai... (by )
  • Retrieval of Water Vapor Vertical Distri... (by )
  • Improving the Bias Characteristics of th... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.