Search Publications
Do BBFs contribute to inner magnetosphere dipolarizations: Concurrent Cluster and Double Star observations
Zhang, T. L.; Klecker, B.; Nakamura, R. +7 more
We examined the relationship between bursty bulk flow (BBF) events observed by Cluster between -19 RE < X < -12 RE and dipolarization events observed by Double Star TC1 between -13 RE < X < -6 RE. TC1 observed dipolarizations for ~33% of the cases when BBFs were observed by Cluster. During th…
Global manifestations of a substorm onset observed by a multi-satellite and ground station network
Escoubet, C. P.; Liu, Z. X.; Frey, H. U. +6 more
With a favorable constellation of spacecraft and ground stations, a study is made on the global manifestations of a substorm onset. The onset occurred simultaneously and conjugately in both hemispheres, confirmed by observations of the auroral breakup from IMAGE FUV-WIC and a sudden intensification of a westward electrojet from ground-based magnet…
Flux closure during a substorm observed by Cluster, Double Star, IMAGE FUV, SuperDARN, and Greenland magnetometers
Wild, J. A.; Lucek, E. A.; Milan, S. E. +5 more
We examine magnetic flux closure during an extended substorm interval on 29 August 2004 involving a two-stage onset and subsequent re-intensifications. Cluster and Double Star provide observations of magnetotail dynamics, while the corresponding auroral evolution, convection response, and substorm current wedge development are monitored by IMAGE F…
The Double Star magnetic field investigation: Overview of instrument performance and initial results
Balogh, A.; Zhang, T. L.; Nakamura, R. +15 more
Double Star is a Chinese National Space Administration mission which augments the European Space Agency's Cluster mission by launching an additional two spacecraft; one into an equatorial orbit and one into a polar orbit. These orbits are carefully chosen to complement Cluster by maximising the opportunities for useful conjunctions when Double Sta…
Active Spacecraft Potential Control: Results From the Double Star Project
Fazakerley, A.; Torkar, K.; Steiger, W.
The ion emitter instrument "active spacecraft potential control" (ASPOC) has been used successfully in several magnetospheric missions including the European Space Agency Cluster Project. An improved version has been developed for the equatorial spacecraft of the Chinese-European Double Star mission (TC-1) launched in December 2003. The modificati…
Further Study of Multiple Flux Rope Events at the Magnetopause Observed by TC-1 on 18 March, 2004
Pu, Zu-Yin; Xiao, Chi-Jie; Liu, Zhen-Xing +3 more
From 23:10 to 23:50 UT on 18 March 2004, the Double Star TC-1 spacecraft detected nine flux ropes at the outbound crossing of the southern dawnside magnetopause. During this time period the Cluster constellation was staying in the magnetosheath. The four spacecraft observed that the interplanetary magnetic field (IMF) showed a dominant negative BY…
The First Cluster and Double Star Symposium
Laakso, Harri; Goldstein, Melvyn; Masson, Arnaud +2 more
Cluster, a joint project between the European Space Agency (ESA) and NASA, is the first mission that is composed of four spacecraft flying in formation, and thus the first able to separate spatial and temporal features inside smallscale plasma structures within, and the boundaries between, many regions of the Earth's upper atmosphere (from 19,000-…