Background Atmosphere Radiance Day (BARD) and Night (BARN)

Abstract

This document describes the format, the details, and methods used to calculate the BACKGROUND ATMOSPHERE RADIANCE DAY (BARD) and NIGHT (BARN) data bases. BARD/BARN (v4.1), in tabular ASCII form, consists of 57 bins, each 5% in energy, spanning 1.9 to 34 micron. BARD/BARN (v4.1) is now available and is being used within fast running codes such as IRSim, HiSEMM, and SCENARIO. ARCHON was used to determine the non-local thermodynamic equilibrium quantum state populations for tangent altitudes starting at 40 km up to 200 km. The radiation transport code NLTE was then used to determine the line-of-sight radiance within each bin for the 75 transitions occurring for CO2, H2O, CO, NO, and O3. For LTE atmosphere, MODTRAN was used for the tangent altitudes from 60 km to 0.1 km. The procedure merging the overlapped portions of the NLTE and LTE data is described. Graphical representations of the BARD/BARN data is appended for user reference.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1991
Accession Number
ADA243153

Entities

People

  • J. P. Kennealy
  • R. A. Armstrong
  • R. J. Larkin
  • S. B. Downer
  • S. P. Mcgowan

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Abstracts
  • Altitude
  • Atmospheres
  • Atmospheric Chemistry
  • Chemical Kinetics
  • Chemistry
  • Databases
  • Dynamics
  • Experimental Data
  • Line Of Sight
  • Quantum States
  • Radiance
  • Radiation
  • Radiative Transfer
  • Test Facilities
  • Transitions
  • Transport Ships

Readers

  • Computer Science.
  • Solar Physics
  • Spectroscopy.

Technology Areas

  • Quantum Computing