The Study of the Relationship between Space Weather and Satellite Anomalies in Indonesia

1. The Study of the Relationship between Space Weather and Satellite Anomalies in Indonesia Abdul Rachman1, Neflia1, Dhani Herdiwijaya2 1National Institute of Aeronautics and Space, 2Bandung Institute of Technology, Indonesia ITB An early warning system against operational disruption for LEO and GEO satellites developed by LAPAN LAPAN and ITB have conducted an empirical study of the relationship between energetic charged particles, CME, CIR, and satellite anomalies which suggests two conclusions: Using SIAS, LAPAN also study the reported anomaly experienced by its LEO satellite LAPAN-TUBSAT. Yearly F10.7 Number of anomalies Number of anomalies CIR-driven storms pose more problem to GSO satellites than CME-driven storms. Low energy particles especially electrons (E < 100 KeV) play more vital contribution to satellite anomalies than higher energetic particles. Number of anomalies Seasonal anomaly distribution Yearly F10.7 Anomaly distribution related to IP source and solar activity Mar-May Jun-Aug Sep-Nov Dec-Feb LAPAN is currently studying the effects of CME and CIR on Indonesia's GSO satellites using data from related operators. The study uses publicly available GSO satellite anomaly dataset in Satellite News Digest since 1997 until 2011 and superposed epoch analysis. Anomaly distribution because of internal and surface charging related to electron flux > 1.1 MeV and solar activity Anomaly distribution according to anomaly types ITB has done several studies related to energetic particles, solar events, and the effects to satellites: They have studied South Atlantic Anomaly (SAA) using AE-8 and AP-8 model in SPENVIS. They found how distributions of trapped energetic particles are depend on altitude, their energies, and phase of solar cycle according to the model (with maximum values in SAA region). Local time anomaly distribution By study satellites’ material responds to space charging using equipot module in SPENVIS, they found that aluminum is relatively suitable for reducing the effects from space charging and gold is relatively suitable for reducing the effects from SEU. Geographical distribution of proton E > 50 MeV at altitude 1500 km in SAA region when solar activity is maximum. Geographical distribution of electrons E > 2 MeV at altitude 1500 km in SAA region when solar activity is maximum. Presented at the Space Weather Workshop April 16-19, 2013 in Boulder, Colorado, USA