Constructing The Global Distribution Of Whistler Mode Chorus Wave Using The POES Electron Data: An Improvement Of The Technique
Abstract
The interaction of plasma waves with radiation belt particles is commonly evaluated using diffusion codes, which rely on statistical models of wave observations that may not accurately reproduce the instantaneous global wave distribution from the limited in situ satellite wave measurements. A novel technique capable of inferring wave amplitudes from low-altitude particle measurements from POES satellites with extensive coverage in L shell and magnetic local time (MLT), has been previously proposed to construct a global dynamic model of plasma waves including chorus, hiss and EMIC waves. In this study, we perform an MLT dependent intersatellite calibration of chorus wave amplitudes inferring from the POES 30-100 keV electron channel with conjunctive Van Allen Probes observations. We then apply the quantified adjustment factors in the technique and construct the global distribution of chorus wave intensities. The results show that the wave amplitudes from the in situ observations are well reproduced by the POES technique. We demonstrate that such a data-based, dynamic model can provide near-real-time estimates of the chorus wave intensity on a global scale for any time period where POES data are available, which cannot be obtained from in situ wave measurements by equatorial satellites alone, but is crucial in quantifying radiation belt particle dynamics.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFMSM33B3576Z
- Keywords:
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- 2716 Energetic particles: precipitating;
- MAGNETOSPHERIC PHYSICSDE: 2720 Energetic particles: trapped;
- MAGNETOSPHERIC PHYSICSDE: 2772 Plasma waves and instabilities;
- MAGNETOSPHERIC PHYSICSDE: 2774 Radiation belts;
- MAGNETOSPHERIC PHYSICS