TITLE:
Effect of the Instrument Slit Function on Upwelling Radiance from a Wavelength Dependent Surface Reflectance
AUTHORS:
Rajinder K. Jagpal, Rehan Siddiqui, Sanjar M. Abrarov, Brendan M. Quine
KEYWORDS:
Radiance Enhancement, Upwelling Radiance, Line-by-Line Computation, Radiative Transfer Model
JOURNAL NAME:
Natural Science,
Vol.14 No.3,
March
29,
2022
ABSTRACT: The Radiance Enhancement (RE) method was introduced for efficient detection of clouds from the space. Recently, we have also reported that due to high reflectance of combustion-originated smokes, this approach can also be generalized for detection of the forest fires by retrieving and analyzing datasets collected from a space orbiting micro-spectrometer operating in the near infrared spectral range. In our previous publication, we have performed a comparison of observed and synthetic radiance spectra by developing a method for computation of surface reflectance consisting of different canopies by weighted sum based on their areal coverage. However, this approach should be justified by a method based on corresponding proportions of the upwelling radiance. The results of computations we performed in this study reveal a good match between areal coverage of canopies and the corresponding proportions of the upwelling radiance due to effect of the instrument slit function.