Multi-spacecraft testing of time-dependent interplanetary MHD models for operational forecasting of geomagnetic storms

Abstract

An MHD 2-1/2D, time-dependent model is used, together with observations of six solar flares during 3-7 February 1986, to 'demonstrate global, large-scale, compound disturbances in the solar wind over a wide range of heliolongitudes. This scenario is one that is likely to occur many times during the cruise, possibly even encounter, phases of the Multi-Comet Mission. It is suggested that a model such as this one should be tested with multi-spacecraft data (such as the MCM and Earth-based probes) with several goals in view: (1) utility of the model for operational real-time forecasting of geomagnetic storms, and (2) scientific interpretation of certain forms of cometary activities and their possible association with solar-generated activity.

Probing the Large-Scale Topology of the Heliospheric Magnetic Field Using Jovian Electrons

“…On the basis of the results presented in this study, we suggest that Jovian electrons may provide a means of remote sensing of the heliospheric magnetic field structure between 1 and 5 AU. Consequently, they provide a unique way of validating models of the solar wind and heliospheric magnetic field (e.g., Gosling et al 1976;Dryer & Smith 1989;Wang & Sheeley 2003;Zieger & Hansen 2008) when in situ observations at suitable heliospheric locations are not available. It remains to be seen whether the short timescale variability in Jovian magnetic connectivity can be probed with Jovian electrons.…”