Spectral Emissivity & Emittance

Spectral-Emissivity Measurements of the 4.3-mu CO2 Band between 2560 degrees and 3000 degrees K
C. C. Ferriso, C. B. Ludwig, and L. Acton
JOSA, Vol. 56, Issue 2, pp. 171- (1966)

Citation
C. C. Ferriso, C. B. Ludwig, and L. Acton, “Spectral-Emissivity Measurements of the 4.3-mu CO2 Band between 2560 degrees and 3000 degrees K,” J. Opt. Soc. Am. 56, 171- (1966)

A NASA report by R. Kumar, dated Sep 1, 1977, available online and downloadable as a PDF document.

ABSTRACT:

The effects of temperature and emittance on the relative magnitude of reflected energy and emitter energy from a target including atmospheric effects was studied. From the calculations of energy reflected and emitted from a target including atmospheric effects using LOWTRAN 3 programs for midlatitude summer model, the following conclusions were obtained (1) At 3.5 micrometers q is considerably less than 1 except at high temperatures and for high emittance (2) at 4 micrometers q is of the order of magnitude equal to 1 for most targets and (3) at 4.6 micrometers, q is considerably greater than 1 at high temperatures and high emittance. In addition, incident atmospheric emission reflected from the target was found to be negligible except for targets having low temperature and low emittance.