Foreshock Significance in Generation of ULF Waves Alex Angelo Mentor-Olga Gutynska.

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Presentation transcript:

Foreshock Significance in Generation of ULF Waves Alex Angelo Mentor-Olga Gutynska

ULF Waves AKA Magnetic Pulsations 1 mHz to 1 Hz Pc versus Pi Variety of events thought to be energy inputs – Kevin-Helmholtz Instabilities – Reconnection – Flux Transfers IONOSPHERE EAR TH ULF WAVES STANDING WAVES

Ion Foreshock

Importance of ULF Waves Oscillations in the magnetosphere disturb the ionosphere Effect the total electron count (TEC) fluctuations (0.005% to 0.1%) While often regarded as insignificant for high frequency EM signal propagation, with improving resolution/signal ULF oscillation becomes detectable – Over-the-horizon radar, GPS, magnetic anomaly detection – Preventing future improvements – Constant noise Radio astronomy – LO-FAR Understand what’s happening in space

Methods

Start of interval End of interval 10/30/07

FFT Broke intervals into ten minute or one hour intervals Looked at Moments for x-components of velocity Looked at ESA for magnetic fluctuations Preformed Fast Fourier Transformation to find frequency and hence period Calculated periods A: s D: s E: s

Period Averages Solar Wind: Magnetosphere:

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