The paper is dedicated to the study of sidereal-diurnal variations of galactic cosmic ray intensity. The existence of such variations is due to a combination of a number of factors, the main ones being the asymmetry of the heliosphere structure and the anisotropy of the spatial-angular distribution of galactic cosmic rays in the interstellar medium. The characteristics of stellar-diurnal variations observed on Earth can be conditionally divided into two energy regions: for cosmic ray energies above TeV, the observed stellar-diurnal variations have an amplitude and maximum time of about 0.1% and 00:00–06:00 Local Sidereal Time, respectively, and in the energy region below TeV, the maximum time of variations shifts to 19:00 with a decrease in amplitudes to about 0.01%. The above dependence of the parameters of stellar-diurnal variations on cosmic ray energies indicates their different nature. Based on the analysis of measurements from the modern Yakutsk spectrograph of cosmic rays named after A.I. Kuzmin, the parameters of the sidereal-diurnal variations and the characteristic energy spectrum for 2009–2022 have been determined. It has been established that the sidereal-diurnal variations observed in the energy range below TeV are formed as a result of the existence of tensor anisotropy of cosmic rays in the interplanetary medium. A comparison of the expected sidereal-diurnal variations with those observed at southern and northern stations of the global network of muon telescopes has been made.
Gololobov et al. (Sun,) studied this question.