Atmospheric transmittance and radiance, methods of calculation
Abstract
The report is broadly divided into the categories of scattering and absorption, with the greater stress laid on absorption. The first of these is the socalled linebyline direct integration method, which requires a detailed compilation of the characteristics of individual molecular lines. The second of the absorption methods of calculation presented is the bandmodel technique. In this method, the line spectrum is approximated by some mathematically manipulatable distribution function with undetermined bandmodel parameters. By comparison of calculated results with laboratory experimental data the parameters are defined, and the bandmodel is used for calculating transmittance under any required meteorological conditions. The third general set of techniques is given the heading MultiParameter Analytical Procedures. These techniques are derived from the bandmodel concept, incorporating a larger number of parameters, with presumably greater accuracy in the resultant calculations. The rest of the report is either tutorial or supportive, presenting details of information which is required as input to the calculation procedures.
 Publication:

Unknown
 Pub Date:
 June 1975
 Bibcode:
 1975atrm.rept.....L
 Keywords:

 Atmospheric Attenuation;
 Atmospheric Scattering;
 Light Transmission;
 Radiative Transfer;
 Distribution Functions;
 Integral Equations;
 Line Spectra;
 Mathematical Models;
 Numerical Analysis;
 Transmittance;
 Geophysics