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Browsing College of Sciences and Mathematics by Author "J. D. Perez"

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Evolution of low-altitude and ring current ENA emissions from a moderate magnetospheric storm: Continuous and simultaneous TWINS observations 

Valek, P.; Brandt, P. C.; Buzulukova, N.; Fok, M-C.; Goldstein, J.; McComas, D. J.; Perez, J. D.; Roelof, E.; Skoug, R. (2020-06-12)
The moderate storm of 22 July 2009 is the largest measured during the extended solar minimum between December 2006 and March 2010. We present observations of this storm made by the two wide-angle imaging neutral-atom ...

Global images of trapped ring current ions during main phase of 17 March 2015 geomagnetic storm as observed by TWINS 

Perez, J. D.; Goldstein, J.; McComas, D. J.; Valek, P.; Fok, M-C; Hwang, Kyoung-Joo (2020-06-03)
A unique view of the trapped particles in the inner magnetosphere provided by energetic neutral atom (ENA) imaging is used to observe the dynamics of the spatial structure and the pitch angle anisotropy on a global scale ...

Overlap of the plasmasphere and ring current: Relation to subauroral ionospheric heating 

Gurgiolo, C.; Sandel, BR; Perez, JD; Mitchell, DG; Pollock, CJ; Larsen, BA (2020-06-18)
The overlap of the ring current with the outer plasmasphere is thought to play a major role in storm-time related increases in the subauroral ambient topside electron temperature. Instabilities generated within the overlap ...