Second harmonic poloidal waves observed by Van Allen Probes in the dusk‐midnight sector Journal of Geophysical Research: Space Physics
收藏NOAA Institutional Repository2023-09-12 更新2026-04-25 收录
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https://doi.org/10.1002/2016ja023770
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资源简介：
Thispaperpresentsobservationsofultralow-frequency(ULF)wavesfromVanAllenProbes. The event that generated the ULF waves occurred 2 days after a minor geomagnetic storm during a geomagnetically quiet time. Narrowband pulsations with a frequency of about 7 mHz with moderateamplitudeswereregisteredinthepremidnightsectorwhenProbeAwaspassingthroughanenhanced densityregionneargeosynchronousorbit.ProbeB,whichpassedthroughtheregionearlier,didnotdetect thenarrowbandpulsationsbutonlybroadbandnoise.Despitethesingle-spacecraftmeasurements,wewereabletodeterminevariouswaveproperties.Wefindthat(1)theobservedwavesareasecondharmonic poloidal mode propagating westward with an azimuthal wave number estimated to be ∼100; (2) the
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NOAA
创建时间：
2023-09-12
