Modified method of empirical orthogonal functions to retrieve the total amount of carbon dioxide from satellite data

Authors: Kataev M. Yu., Lukyanov A. K., Maksyutov S.

Annotation: We consider a modification of empirical orthogonal functions (EOF) method to solve the problem of recovery of the total amount of carbon dioxide based on the real data measurements obtained from satellite device GOSAT. The modification consists in taking into account the singular value decomposition of not only the matrix of the measured signals (the basic approach), but also of the matrix total carbon dioxide content (option). The processing results obtained with primary and modified method of empirical orthogonal functions when measuring satellite spectra reflected from the surface of solar radiation in the near infrared spectrum region are shown. Geographic location of the data received from satellite is associated with the station Lamont belonging to TCCON network of ground-based measurements of the CO2 total content.

Keywords: atmosphere, gas composition, remote satellite sensing, reflected surface solar radiation, fourier-spectrometer, empirical orthogonal functions