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

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

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Armstrong, R A, Downer, S B, Kennealy, J P, Larkin, R J, McGowan, S P
Format: Report
Sprache:eng
Schlagworte:
ALTITUDE
ARCHON COMPUTER PROGRAM
ATMOSPHERES
Atmospheric Physics
BACKGROUND
BACKGROUND RADIATION
CODING
DATA BASES
DAY
DIURNAL VARIATIONS
GRAPHICS
HISEMM COMPUTER PROGRAM
Infrared Detection and Detectors
LINE OF SIGHT
MODTRAN COMPUTER PROGRAM
NIGHT
PE62715H
RADIANCE
RADIATIVE TRANSFER
SCENARIO COMPUTER PROGRAM
STARTING
TANGENTS
USER NEEDS
WUDH048120
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Beschreibung
Zusammenfassung: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.