Journal article
A novel technique to construct the global distribution of whistler mode chorus wave intensity using low‐altitude POES electron data
Journal of geophysical research. Space physics, Vol.119(7), pp.5685-5699
07/2014
DOI: 10.1002/2014JA019935
Abstract
Although magnetospheric chorus plays a significant role in the acceleration and loss of radiation belt electrons, its global evolution during any specific time period cannot be directly obtained by spacecraft measurements. Using the low‐altitude NOAA Polar‐orbiting Operational Environmental Satellite (POES) electron data, we develop a novel physics‐based methodology to infer the chorus wave intensity and construct its global distribution with a time resolution of less than an hour. We describe in detail how to apply the technique to satellite data by performing two representative analyses, i.e., (i) for one specific time point to visualize the estimation procedure and (ii) for a particular time period to validate the method and construct an illustrative global chorus wave model. We demonstrate that the spatiotemporal evolution of chorus intensity in the equatorial magnetosphere can be reasonably estimated from electron flux measurements made by multiple low‐altitude POES satellites with a broad coverage of L shell and magnetic local time. Such a data‐based, dynamic model of chorus waves can provide near‐real‐time wave information on a global scale for any time period where POES electron data are available. A combination of the chorus wave spatiotemporal distribution acquired using this methodology and the direct spaceborne wave measurements can be used to evaluate the quantitative scattering caused by resonant wave‐particle interactions and thus model radiation belt electron variability.
Key Points
A novel method is developed to infer chorus intensity using POES data
It provides near‐real‐time global chorus information for any given time period
Such a data‐based dynamic chorus model is significant for radiation belt studies
Details
- Title: Subtitle
- A novel technique to construct the global distribution of whistler mode chorus wave intensity using low‐altitude POES electron data
- Creators
- Binbin Ni - Wuhan UniversityWen Li - University of California, Los AngelesRichard M Thorne - University of California, Los AngelesJacob Bortnik - University of California, Los AngelesJanet C Green - National Oceanic and Atmospheric AdministrationCraig A Kletzing - University of IowaWilliam S Kurth - University of IowaGeorge B Hospodarsky - University of IowaMaria Soria‐Santacruz Pich - University of California
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.119(7), pp.5685-5699
- DOI
- 10.1002/2014JA019935
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Number of pages
- 15
- Language
- English
- Date published
- 07/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984200042502771
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