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Sub-Auroral Polarization Stream (SAPS) duration as determined from Van Allen Probe successive electric drift measurements

We examine a characteristic feature of the magnetosphere-ionosphere coupling, namely, the persistent and latitudinally narrow bands of rapid westward ion drifts called the Sub-Auroral Polarization Streams (SAPS). Despite countless works on SAPS, information relative to their durations is lacking. Here, we report on the first statistical analysis of more than 200 near-equatorial SAPS observations based on more than two years of Van Allen Probe electric drift measurements. First, we present results relative to SAPS radial loca ...

Lejosne, ène; Mozer, F.;

YEAR: 2017     DOI: 10.1002/2017GL074985

duration; electric drift measurements; magnetosphere-ionosphere coupling; SAPS; Van Allen Probes