Efficient Application of the Radiance Enhancement Method for Detection of the Forest Fires Due to Combustion-Originated Reflectance

Abstract

The existing methods for detection of the cloud scenes are applied at relatively small spectral range within shortwave upwelling radiative wavelength flux. We have reported a new method for detection of the cloud scenes based on the Radiance Enhancement (RE). This method can be used to cover a significantly wider spectral range from 1100 nm to 1700 nm by using datasets from the space-orbiting micro-spectrometer Argus 1000. Due to high sunlight reflection of the smoke originated from the forest or field fires the proposed RE method can also be implemented for detection of combustion aerosols. This approach can be a promising technique for efficient detection and continuous monitor of the seasonal forest and field fires. To the best of our knowledge this is the first report showing how a cloud method can be generalized for efficient detection of the forest fires due to combustion-originated reflectance.

A Two-Domain MATLAB Implementation for Efficient Computation of the Voigt/Complex Error Function

“…Equation ( 11) deals only with a single point h 2 /π 2 for the parameter t and does not represent any practical interest. Therefore, further we will consider only two equations (10) and (12). Mata and Reichel [42] showed the relations that link both functions Ψ(x, t) and w(x, y) with each other.…”

Effect of the Instrument Slit Function on Upwelling Radiance from a Wavelength Dependent Surface Reflectance

“…We have shown recently that the datasets of the upwelling radiance collected from a space remote sensor can also be used for efficient detection of cloud scenes by using the Radiance Enhancement method [11][12][13][14]. Specifically, the RE method utilizes the line-by-line radiative transfer model GENSPECT [15] in order to match the synthetic radiance with observed radiance by incrementing or decrementing several variables like concentration of gases, zenith angle, deviation of the nadir angle, etc.…”

“…The computation is performed in a nested loop until a best match of synthetic and observed radiance spectra is achieved. A least square method is applied as a criterion to match the computed and observed data [14]. Apart from the variable parameters, the wavelength dependency of the reflecting surface has to be taken into consideration.…”

On the Highly Accurate Evaluation of the Voigt/Complex Error Function with Small Imaginary Argument

“…respectively. The real part of the complex error function K(x, y) also known as the Voigt function, occurs in great diversity in astrophysical spectroscopy, space science, neutron physics, plasma physics and statistical communication theory, as well as in some areas in mathematical physics and engineering associated with multi-dimensional analysis of spectral harmonics [4][5][6][7][8][9][10][11][12][13][14][15][16]. For example, the Voigt function is a fundamental component of the line-by-line (LBL) radiative transfer modeling for the analysis of planetary atmospheres [5][6][7].…”