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The NUCLEON experiment is aimed to investigate composition and energy spectra of high energy cosmic rays. Direct measurements of energy spectra of cosmic ray protons and nuclei at the range of 1-100 TeV are very important for the solution of a general astrophysical problem of origin of cosmic rays. The satellite was launched in 26 December 2014. The measured charge composition is analysed and compared with data obtained by other experiments at lower energies. The proton to helium ratio is close to constant at the wide magnetic rigidity area (3-100 TV). The charge composition dependence on magnetic rigidity can be explained by means of the single source model.