Vol. 2, issue 05, article # 6

Abstract:

A technique for quasi-optimal filtration of spectrophotometric information is considered. For an additive mixture of a signal and white noise, the frequency characteristic of a filter is determined by the signal spectrum. The analysis makes use of a model of the signal, which is based on the extraterrestrial solar spectrum and the instrument function of an actual spectrometer. Estimation of the frequency spectral density of this signal model allows one to conclude that the Gaussian filter is a quasi-optimal filter in the class of linear systems. A relationship between the filter parameter and standard deviation of the noise is obtained. The efficiency of this filter is estimated from experimental data.

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