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Heliophysics Great Observatories and international cooperation in Heliophysics: An orchestrated framework for scientific advancement and discovery
Vourlidas, Angelos; Blanco-Cano, Xóchitl; Lavraud, Benoit +21 more
We suggest that the next era of Heliophysics should focus on the Sun-Heliosphere and Geospace as each a system-of-systems, and recommend a coordinated, deliberate, worldwide scientific effort to answer long-standing questions that will remain unanswered without a unified program. Many of the biggest unanswered science questions that remain across …
Multipoint observations of compressional Pc5-6 pulsations in the dawn side magnetosphere: A case study
Sibeck, D. G.; Korotova, G. I.
We present a case study of compressional Pc5-6 pulsations observed by THEMIS-D and -E in the dawn sector of the magnetosphere following 1100 UT on January 22, 2010. The pulsations were observed during a moderate substorm triggered by the IMF discontinuity and an accompanying change in the solar wind dynamic pressure at 1045 UT. The event can be co…
THEMIS observations of compressional Pc5 pulsations in the dawn- and duskside magnetosphere
Sibeck, D. G.; Korotova, G. I.
We present case and statistical studies of compressional Pc5 pulsations observed by the THEMIS spacecraft in the dawn- and duskside magnetosphere from 2007 to 2011. A case study provides evidence for compressional Pc5 pulsations in the dawnside magnetosphere following the arrival of particles injected by a substorm and the subsequent growth of the…
Earth's magnetotail variability during supersubstorms (SSSs): A study on solar wind-magnetosphere-ionosphere coupling
Hajra, Rajkumar; Echer, Ezequiel; Franco, Adriane Marques de Souza +1 more
Supersubstorm (SSS) events are associated with extremely intense westward auroral electrojet currents (the minimum SuperMAG AL or SML < - 2500 nT) resulting from the solar wind-magnetosphere coupling. We present, for the first time, variability of the Earth's magnetotail and coupling from the solar wind to magnetotail, geosynchronous orbit and …
Statistical analysis of the relationship between Power spectral density of magnetic turbulence and ion velocity in magnetotail bursty bulk Flows
Du, A. M.; Wu, Q.; Wang, G. Q.
Based on the observation of the THEMIS satellites, we utilize the superposed epoch method to statistically analyze how the p (Power Spectral Density) of compressional and transverse components of the magnetic field is affected by the ion inflow velocity V⊥ which is the peak velocity of BBFs (Bursty Bulk Flows). The analysis demonstrated…
Development and coupling test of active spacecraft potential control - Next generation (ASPOC-NG)
Cipriani, Fabrice; Nakamura, Rumi; Steller, Manfred +7 more
The active spacecraft potential control (ASPOC) system developed in the 1990s emits positive ions to neutralise the spacecraft potential, such as used in several missions like Geotail, Equator-S, Cluster, Doublestar and MMS. With the experience gained, the next generation of the active spacecraft potential control (ASPOC-NG) instrument has been de…
Theoretical studies of low and high frequency electrostatic solitary waves in the magnetopause associated with asymmetric magnetic reconnection
Bharuthram, R.; Rufai, O. R.; Maharaj, S. K.
In a comprehensive analysis of Cluster data, Graham et al. (2015) have reported the existence of slow and fast electrostatic solitary waves (ESWs) associated with asymmetric magnetic reconnection arising from the merger of the magnetic fields, and mixing, of the hot tenuous magnetospheric plasma and the cooler dense magnetosheath plasma. Their ana…
Google dataset search and DOI for data in the ESA space science archives
De Marchi, Guido; Masson, Arnaud; Merin, Bruno +3 more
Reproducibility is at the core of science. For this reason, a common practice for authors is to provide links to the data used in their manuscripts upon submission to peer-reviewed journals. In space science, reference to archives' websites of major data providers like space agencies are still accepted by most journals. However, even these website…
Large-scale altitude distribution profile of auroral parallel electric potentials: A statistical analysis of Cluster data
Sadeghi, Soheil; Emami, M. Reza
It is generally believed that the heart of the Auroral Acceleration Region (AAR) is located between 5000 and 8000 km altitude above the auroral oval. Various altitude distribution profiles are suggested by different theories, including the transition layer model, which predicts that the strongest electric fields can be found at about 1 RE
Electric potential structures of auroral acceleration region border from multi-spacecraft Cluster data
Sadeghi, S.; Emami, M. R.
This paper studies an auroral event using data from three spacecraft of the Cluster mission, one inside and two at the poleward edge of the bottom of the Auroral Acceleration Region (AAR). The study reveals the three-dimensional profile of the region's poleward boundary, showing spatial segmentation of the electric potential structures and their d…