Articles | Volume 23, issue 9
22 Nov 2005
 | 22 Nov 2005

Space weather and space anomalies

L. I. Dorman, N. Iucci, A. V. Belov, A. E. Levitin, E. A. Eroshenko, N. G. Ptitsyna, G. Villoresi, G. V. Chizhenkov, L. I. Gromova, M. Parisi, M. I. Tyasto, and V. G. Yanke

Abstract. A large database of anomalies, registered by 220 satellites in different orbits over the period 1971-1994 has been compiled. For the first time, data from 49 Russian Kosmos satellites have been included in a statistical analysis. The database also contains a large set of daily and hourly space weather parameters. A series of statistical analyses made it possible to quantify, for different satellite orbits, space weather conditions on the days characterized by anomaly occurrences. In particular, very intense fluxes (>1000 pfu at energy >10 MeV) of solar protons are linked to anomalies registered by satellites in high-altitude (>15000 km), near-polar (inclination >55°) orbits typical for navigation satellites, such as those used in the GPS network, NAVSTAR, etc. (the rate of anomalies increases by a factor ~20), and to a much smaller extent to anomalies in geostationary orbits, (they increase by a factor ~4). Direct and indirect connections between anomaly occurrence and geomagnetic perturbations are also discussed.