Sbdart manual

Git stats 47 commits. Failed to load latest commit information. View code. Releases No releases published. Packages 0 No packages published. You signed in with another tab or window. Reload to refresh your session. In the previous example, the input parameter NSTR, which sets the number of in- ternal radiation streams, was left at its default value of 4 four polar angles and four azimuthal modes.

As a result, given the same wavelength integration interval, the calculation of radiance takes much longer than irradiance. A similar top of the atmosphere dotted and at the surface solid. Iacono, and J. Moncet, Line-by- line calculations of atmospheric fluxes and cooling rates: Ap- plication to water vapor. Dahlback, A. Stamnes, A new spherical model for computing the radiation field available for photolysis and heat- ing at twilight. Space Sci. Ellingson, R.

Hansen, J. Kato, S. Ackerman, E. Clothiaux, J. Mather, G. Mace, M. Wesely, F. Murcray, and J. Michalsky, Un- certainties in modeled and measured clear-sky surface short- Fig. The horizontal axis of each semicircle de- wave irradiances. Shettle, W.

Gallery, J. Chetwynd, upwelling directed radiation shown in the upper panel L. Abreu, J. Selby, S. Clough, and R. The Kondratyev, K. Academic relative azimuth angle is labeled at the outer edge of Press, pp. Since the radiance is symmetric with Koskela, T. Damski, P. Taalas, and A. Kylling, UV-B radiation at common optical air masses: Geo- respect to relative azimuth, only the relative azimuth graphical comparison and model performance tests.

Radiation Symp. In the optical depth 5 case, Harcourt Brace Jovanovich, pp. Lubin, D. Ricchiazzi, C. Gautier, and R.

Whritner, A the photons emerging from the bottom of the cloud method for mapping Antarctic surface UV radiation using mul- are directed predominately along the direct beam di- tispectral satellite imagery.

This is due to Measurements and Biological Effects, C. Weiler and P. As the Penhale, Eds. Ellingson, Y. Fouquart, S. Fels, N. Scott, and W. Wiscombe, Intercomparison of radiation codes in cli- anisotropy of the radiance decreases, and the direction mate models ICRCCM : Longwave clear-sky results.

McClatchey, R. Fenn, J. Selby, F. Volz, and J. Garing, Optical properties of the atmosphere. Papers No. References Neckel, H. Berk, A. Bernstein, and D. Part I: Spatial effects. MA — Peng, New molecular transmis- Bernstein, L. Berk, D. Robertson, P. Acharya, G. Chetwynd, Addition of a correlated- Anson, and D. Landen, Eds. Schwartz, The atmospheric radia- Remote Sensing.

First ed. Photogrammetry, pp. Gautier, Investigation of the effect and design of the cloud and radiation test bed. Deroo, P. Duhaut, M. Herman, J. Morcrette, 3D radiative transfer model. Perbos, and P. Deschamps, Description of a com- ——, ——, and D. Lubin, Cloud scattering optical depth puter code to simulate the satellite signal in the solar spectrum: and local surface albedo in the Antarctic: Simultaneous re- The 5S code. Remote Sens. Gore, and L.

Giver, 21 —21 Radiative flux measurements in the troposphere. Fenn, Models of the atmospheric surements. Kneizys, and W. Gallery, Suggested modifi- Wiscombe, W. Evans, Exponential-sum fitting of radia- Staetter, R. Schroeder, Spectral characteristics of tive transmission functions. Warren, Part I: Pure snow. Cess, and X. SBDART determines the radiation flux for one single day of the year and time used to determine the solar relationship with the earth.

Data Processing. Averaged gas absorption over solar spectrum and filter function. The output quantity is the negative log of the transmission which, aside from non-Beer's law behaviour, is like optical depth.

If the input quantity NF is non-zero then the transmission is averaged over the solar spectrum. It does not include the solar direct beam. Also, keep in mind that UURS represents the radiance at the user specified sample directions. Radiative flux at each layer for each wavelength. One output record per run, integrated over wavelength. Radiant fluxes at each atmospheric layer integrated over wavelength. Radiance output at ZOUT 2 km.

Radiance and flux at each atmospheric layer integrated over wavelength. Calibration Efforts and Validation. The downloadable tar file also includes a set of UNIX shell command files, sbcmd.

These five command files produce output corresponding to the five sample problems given in some of the available data. To ensure the code is operating properly, you should compare your results with the contents of these files.