Accession Number:

ADA243153

Title:

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

Descriptive Note:

Technical rept. 14 Mar 1990-15 Apr 1991,

Corporate Author:

MISSION RESEARCH CORP NASHUA NH

Report Date:

1991-12-01

Pagination or Media Count:

140.0

Abstract:

This document describes the format, the details, and methods used to calculate the BACKGROUND ATMOSPHERE RADIANCE DAY BARD and NIGHT BARN data bases. BARDBARN v4.1, in tabular ASCII form, consists of 57 bins, each 5 in energy, spanning 1.9 to 34 micron. BARDBARN 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 BARDBARN data is appended for user reference.

Subject Categories:

  • Atmospheric Physics
  • Infrared Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE