Pub. Date:
Springer New York
The THEMIS Mission / Edition 1

The THEMIS Mission / Edition 1


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The THEMIS Mission / Edition 1

J.L. Burch·V. Angelopoulos Originally published in the journal Space Science Reviews, Volume 141, Nos 1–4, 1–3. DOI: 10.1007/s11214-008-9474-5 © Springer Science+Business Media B.V. 2008 The Earth, like all the other planets, is continuously bombarded by the solar wind, which is variable on many time scales owing to its connection to the activity of the Sun. But the Earth is unique among planets because its atmosphere, magnetic eld, and rotation rates are each signi cant, though not dominant, players in the formation of its magnetosphere and its reaction to solar-wind inputs. An intriguing fact is that no matter what the time scale of solar-wind variations, the Earth’s response has a de nite pattern lasting a few hours. Known as a magnetospheric substorm, the response involves a build-up, a crash, and a recovery. The build-up (known as the growth phase) occurs because of an interlinking of the geom- netic eld and the solar-wind magnetic eld known as magnetic reconnection, which leads to storage of increasing amounts of magnetic energy and stress in the tail of the mag- tosphere and lasts about a half hour. The crash (known as the expansion phase) occurs when the increased magnetic energy and stresses are impulsively relieved, the current system that supports the stretched out magnetic tail is diverted into the ionosphere, and bright, dynamic displays of the aurora appear in the upper atmosphere. The expansion and subsequent rec- ery phases result from a second magnetic reconnection event that decouples the solar-wind and geomagnetic elds.

Product Details

ISBN-13: 9780387898193
Publisher: Springer New York
Publication date: 05/05/2009
Edition description: 2009
Pages: 583
Product dimensions: 6.30(w) x 9.30(h) x 1.10(d)

Table of Contents

Foreword.- The THEMIS Mission.- THEMIS Science Objectives and Mission Phases.- Orbit Design for the THEMIS Mission.- THEMIS Operations.- The THEMIS Constellation.- Instrument Data Processing Unit for THEMIS.- The THEMIS Magnetic Cleanliness Program.- Instrument Boom Mechanisms on the THEMIS Satellites; Magnetometer, Radial Wire, and Axial Booms.- THEMIS Ground Based Observatory System Design.- The THEMIS Fluxgate Magnetometer.- The Search Coil Magnetometer for THEMIS.- The THEMIS ESA Plasma Instrument and In-flight Calibration.- The Electric Field Instrument (EFI) for THEMIS.- The THEMIS Digital Fields Board.- The THEMIS Array of Ground-based Observatories forthe Study of Auroral Substorms.- THEMIS Ground-Based Magnetometers.- The Upgraded CARISMA Magnetometer Array intheTHEMIS Era.- First Results from the THEMIS Mission.- THEMIS ESA First Science Results and Performance Issues.- First Results of the THEMIS Search Coil Magnetometers.- OpenGGCM Simulations for the THEMIS Mission.- The Time History of Events and Macroscale Interactions during Substorms (THEMIS) Education and Outreach (E/PO) Program.

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