IACG Campaign III: Solar events and their manifestation in interplanetary space and in geospace

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Abstract

In Spring 1994 the Inter Agency Consultative Group Campaign III was set up at a kick-off meeting in Sagamihara, Japan. The basic idea of Campaign III was to coordinate solar, interplanetary and near-Earth spacecraft in an effort to link solar and near-Earth observations relating to activity such as solar mass ejections, and features such as corotating interaction regions. The Campaign was split into two basic activities, namely (i) studies of the onset of mass ejections, and (ii) studies of the effects of mass ejections and other solar phenomena at the Earth. The onset of the Campaign activities was effectively linked to the launch date of the Solar and Heliospheric Observatory (SOHO) spacecraft, since most of the planned activities centred on use of SOHO data linked to other spacecraft. SOHO was launched in December 1995 and the onset of full scientific operations was in March/April 1996. At the time of writing the more complex, time consuming multiple instrument operations such as the ones required for the IACG campaign have not been run, though pilot studies between selected instruments have been performed. Thus, we have preliminary observations relevant to the Campaign, and we anticipate the full campaign tobe run on several occasions before the end of the year. In this paper, we report on the IACG Campaign III concept and on the preliminary results from the pilot studies.

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