Accession Number:

AD0783492

Title:

Approximations in Inverting the Radiative Transfer Equation.

Descriptive Note:

Research and development technical rept.,

Corporate Author:

ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s):

Report Date:

1974-07-01

Pagination or Media Count:

14.0

Abstract:

The paper demonstrates that for wavenumbers used for satellite remote sensing of temperature and for temperature in the range encountered in the atmosphere, the Planck function can be approximated by a Taylors expansion about a guess temperature with sufficient accuracy obtained after the first derivative term. Moreover, it is shown that the derivative of the Planck function with respect to temperature, T, is approximately equal to .01T-1.3. The approximations are incorporated into an iterative retrieval algorithm to obviate the transcendental functional evaluations usually required in inverting the radiative transfer equation. The resulting procedure provides approximately 80 percent savings in computer time with insignificant loss of accuracy. Author

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE