Rendani Nndanganeni (North-West University (Potchefstroom campus) South Africa)
Modeling and the subsequent understanding of the processes responsible for the solar modulation of Jovian and galactic electrons require that a source function for Jovian electrons and a heliopause spectrum (HPS) for galactic electron as an input spectrum be specified at the heliopause (assumed to be the solar modulation boundary). Using a comprehensive three-dimensional numerical model based...
333. Solar modulation of galactic cosmic rays electrons and positrons over the 23rd solar minimum with the PAMELA experiment.
Riccardo Munini (INFN - Universita Studi Trieste)
The satellite-borne PAMELA experiment was launched in June 2006 from the Baikonur cosmodrome and since than it has been taking data. The apparatus design is particularly suited for particle and antiparticle identification. At this conference we present the half-yearly galactic cosmic ray electron and positron spectra measured down to 70 MeV and from July 2006 to December 2009. The most...
Godfrey sibusiso Nkosi (Vaal University of technology)
Several space missions have improved our knowledge of the solar modulation of galactic cosmic rays in the heliosphere during the past 40 years (e.g. Pioneer 10 & 11, Voyager 1 & 2, IMP 8, Ulysses, PAMELA and more). These data sets are from solar minimum to solar maximum activity with clear differences in the energy spectra of the positive and negative magnetic polarity cycles. The modulation...
967. The solar modulation potential derived by spacecraft measurements modified to describe GCRs at energies below neutron monitors and above
Jan Gieseler (University of Kiel)
Galactic Cosmic Rays (GCRs) are modulated by various effects as they propagate through the heliosphere before they are detected at Earth. This transport can be described by the Parker equation (Parker, 1965). It calculates the phase space distribution of GCRs depending on the main modulation processes: convection, drifts, diffusion and adiabatic energy changes. A first order approximation of...
Dr Pankaj Kumar Shrivastava (Govt.Model Science College,Rewa(M.P.)India)
Galactic cosmic rays are modulated through their propagation in interplanetary medium by the effect of large scale disturbances in sun related interplanetary medium. Often the interplanetary parameters used in modulation are solar wind velocity V and interplanetary magnetic field B. For this study, we have used the monthly, quarterly, half yearly and yearly mean values of solar wind velocity...
117. North-south anisotropy of galactic cosmic rays observed with the Global Muon Detector Network (GMDN)
Prof. Kazuoki Munakata (Department of Physics, Shinshu University)
We analyze the north-south anisotropy (NSA) of galactic cosmic rays (GCRs) observed with the GMDN on hourly basis in the “toward” (T) and “away” (A) IMF sectors separately. From the monthly mean and its standard error of NSA in each of T and A sectors, we deduce the “T/A separation” and its temporal variation during a period between 2006 and 2014. We also examine the “success rate” which is a...
131. Average features of the interplanetary shock observed with the Global Muon Detector Network (GMDN)
Mr Masayoshi Kozai (Department of Physics, Shinshu University)
Galactic cosmic ray (GCR) depleted regions behind the interplanetary shocks or disturbances cause the Forbush decreases (Fds), short term decreases of the GCR isotropic intensity (or GCR density) at the Earth. We can deduce the geometries of the depleted regions from three-dimensional GCR anisotropy associated with Fds, because the first order anisotropy reflects the spatial gradient of GCR...
159. RELEVANCE OF LONG TERM TIME – SERIES OF ATMOSPHERIC PARAMETERS AT A MOUNTAIN OBSERVATORY TO MODELS FOR CLIMATE CHANGE
Prof. Karel Kudela (IEP SAS, Watsonova 47, 04001 Košice, Slovakia)
A detailed analysis has been made of annual meteorological, and cosmic ray, data from the Lomnicky stit mountain observatory (2634 masl), from the standpoint of looking for possible solar cycle (including cosmic ray) manifestations. Interestingly, it is found that taking the two 'recent' Solar Cycle periods (SC 22 and 23), the measured 'cloud cover' is nearly linearly proportional to the...