XTRAN: An Atmospheric Transmittance Code Based on XSCALE

Abstract

Several Electro-Optical Systems Atmospheric Effects Library modules require the use of XSCALE for calculation of the natural atmospheric transmittance value. XSCALE is a large (over 1600 lines of code) algorithm, which, in some cases, requires other external modules or data files for execution. XTRAN, a comparatively smaller (less than 240 lines) computer code, was developed for use with the KWIK (crosswind integrated concentration) munition expenditure stand-alone versions (SKWIK and IKWIK). XTRAN computes horizontal extinction and transmittance values based on the XSCALE module for visible, near-, mid-, and far-infrared wavelengths by using estimated values of visibility and polynomial regression equations for aerosol extinction as a function of relative humidity. This report shows the usefulness and practicality of the XTRAN code as a horizontal transmittance model.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1991
Accession Number
ADA237624

Entities

People

  • Ricardo Pena

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Air Force
  • Air Masses
  • Algorithms
  • Artillery
  • Atmospheric Sciences
  • Computer Programs
  • Computers
  • Equations
  • Extinction
  • Humidity
  • Meteorology
  • Military Research
  • Munitions
  • Plastic Explosives
  • Test And Evaluation
  • Transmittance
  • Visibility

Readers

  • Chemistry (specifically Chemical Fluorescence)
  • Computer Science.
  • Spectroscopy.