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The diurnal anisotropy of cosmic ray intensity for the timeperiod 2001 to 2014 is studied, covering the maximum and the descending phaseof solar cycle 23, the minimum between solar cycles 23 and 24, and theascending phase and maximum of solar cycle 24. Cosmic ray intensitydata from 11 neutron monitor stations located at different places around theNorthern Hemisphere obtained from the high-resolution Neutron MonitorDatabase (NMDB) were used. Special software was developed for the calculationsof the amplitude and the phase of the diurnal anisotropy vectors on annualand monthly basis using Fourier analysis and for the creation of the harmonicdial diagrams. The geomagnetic bending for each station was taken intoaccount in our calculations determined from the asymptotic cones of eachstation via the Tsyganenko96 (Tsyganenko and Stern, 1996) magnetospheric model. From our analysis, it wasresulted that there is a different behavior of the diurnal anisotropy vectorsduring the different phases of the solar cycles depending on the solarmagnetic field polarity. The latitudinal and longitudinal distribution of thecosmic ray diurnal anisotropy was also examined by grouping the stationsaccording to their geographic coordinates, and it was shown that diurnalvariation is modulated not only by the latitude but also by the longitude ofthe stations. The diurnal anisotropy during strong events of solar and/orcosmic ray activity is discussed

Latitudinal and longitudinal dependence of the cosmic ray diurnal anisotropy during 2001–2014