Prediction of coronal and heliospheric magnetic fields: The promise of SOI-MDI on SOHO

Astronomy and Astrophysics – Astronomy

Scientific paper

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Coronas, Heliosphere, Solar Cycles, Solar Magnetic Field, Solar Oscillations, Astronomical Models, Magnetic Measurement, Temporal Resolution, Solar Corona, Static Characteristics

Scientific paper

Models of the coronal magnetic field have been developed over the years that reproduce the static characteristics of coronal and heliospheric structures fairly well. Limitations of spatial and temporal resolution and nonuniform quality of the input data have made it particularly difficult to investigate the response of the corona to rapidly changing photospheric conditions. The Solar Oscillations Investigation (SOI) experiment on SOHO, scheduled for launch late in 1995, will produce a series of full-disk photospheric magnetic field observations with 4" resolution about every 2 hours for the next several years. Higher resolution observations of the center of the disk will be available several times per day. These data should provide a basis for predicting the coronal and heliospheric field and their changes with unprecedented accuracy during the rising phase of Solar Cycle 23.

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