system, equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA). Due to its importance, there is much interest in accurately measuring the EEF. However, there is a severe lack of high quality data with the notable exception being the JULIA coherent scatter radar in Peru. In this work, we use CHAMP satellite-derived latitudinal current profiles of the day-time EEJ in order to...

[1] Thermospheric density simultaneously observed by the CHAMP and GRACE satellites in both the pre‐dawn and afternoon local time sectors undergoes significant decrease across both hemispheres during the major stratospheric sudden warming (SSW) in January 2009. This decrease is largest in the equatorial region near the subsolar latitude, reaching ∼30% at 325 km, and 45% at 475 km altitude in th...

The equatorial ionosphere contains imbedded bubbles that rise though a horizontally stratified plasma. The motion of the bubbles are affect by gravity, neutral winds or external electric fields which produce electric fields in the F-Region density perturbations of the bubbles. Exact solutions for the electric potentials are derived assuming linear or circular symmetry to the density structures ...

[1] In this work, the magnetic variations simulated by the NCAR thermosphereionosphere-electrodynamics general circulation model (TIE-GCM) in the vicinity of the magnetic equator are examined to evaluate the ability of this model to reproduce the major features of the equatorial electrojet (EEJ) as observed on the ground as well as on board low-altitude orbiting satellites. The TIE-GCM simulate...

[1] All-sky imagers located at Tucumán, Argentina (26.9 S, 65 W, 14.2 S dip latitude), and Arequipa, Perú (16.5 S, 71.5 W, 2.7 S dip latitude), are used to track 630 nm airglow depletion motions in the first use of multisite airglow imagers for studies of low-latitude plasma dynamics. A new image analysis technique yields a consistent determination of nighttime zonal plasma drifts from all-sky ...

The Small Scale magNetospheric and Ionospheric Plasma Experiment (SNIPE)’s scientific goal is to observe spatial temporal variations of the micro-scale plasma structures on topside ionosphere. four 6U CubeSats (~10 kg) will be launched into a polar orbit at ~500 km. distances each satellite controlled from 10 km more than ~1,000 by formation flying algorithm. SNIPE mission equipped with identic...

We consider the magnetic interconnection of Saturn’s northern and southern polar regions controlled by the interplanetary magnetic field (IMF), studying in particular the more complex and interesting case of southward IMF, when the Kronian magnetospheric magnetic field structure is the most twisted. The simpler case of northward IMF is also discussed. Knowledge of the magnetospheric magnetic fi...

I^^K^ • We analyzed ionospheric observations made with digisondes in Jicamarca, Ramey, Wallops Island, Ascension Island, and Kwajalein Island during the major magnetic storm of November 9-10, 2004 that was associated with rapid interplanetary magnetic field (IMF) Bz changes. The strongest ionospheric responses to the southward IMF Bz turning were observed at the dip equator at Jicamarca where d...

Equatorial Vortex Experiment (EVEX), the EVEX mission of May 2013, carried out from Roi-Namur, Kwajalein Atoll, explored initiation physics equatorial spread-F with a pair rockets launched simultaneously during local sunset to apogees 182 and 331 km, respectively. measurements presented in this paper establish existence differential zonal flow between plasma neutrals at bottom-side F-region hei...

[1] Using a model of force balance in Saturn’s disk‐like magnetosphere, we show that variations in hot plasma pressure can change the magnetic field configuration. This effect changes (i) the location of the magnetopause, even at fixed solar wind dynamic pressure, and (ii) the magnetic mapping between ionosphere and disk. The model uses equatorial observations as a boundary condition—we test it...