M. Fehringer

TL;DR: The Cluster mission as discussed by the authors is the cornerstone project of the ISTP and the SOHO missions, which was finally launched in the summer of 2000, with two Russian Soyuz rockets blasted off from the Russian cosmodrome in Baikonour to deliver two Cluster spacecraft, each into their proper orbit.

TL;DR: In this article, the design and principles of the operation of the instrument for active spacecraft potential control (ASPOC) are presented in detail, and the instrument is oper- ated with constant ion current for most of the time, but tests have been carried out with varying currents and a feedback mode with the instrument EFW, which measures the space- craft potential.

TL;DR: The International Rosetta mission is set for a rendezvous with Comet 67 P/Churyumov-Gerasimenko in 2014 as discussed by the authors, and the Micro-Imaging Dust Analysis System (MIDAS) instrument is an essential element of Rosetta's scientific payload.

TL;DR: In this paper, an active spacecraft potential control instrument (ASPOC) is proposed to measure the cold component of the ambient plasma in the case of the Geotail spacecraft with ion emitters of the liquid-metal ion-source type.

TL;DR: In this paper, a novel ion emitter for active control of the electrostatic potential on the surface of the spacecraft is presented. But the authors do not consider the effect of ion emission on the performance of the surface potential control.