Click on images above to learn how STEREO uses simultaneous observations from the two spacecraft to study solar events

Primary Science Objectives

• Understand the causes and mechanisms of CME initiation
• Characterize the propagation of CMEs through the heliosphere
• Discover the mechanisms and sites of energetic particle acceleration in the low corona and the interplanetary medium
• Develop a 3D time-dependent model of the magnetic topology, temperature, density, and velocity structure of the ambient solar wind

New IMPACT Investigation Approaches

• Multipoint in-situ characterization of ICMEs and SEPs resulting from imaged CMEs at different separations at 1AU
• Quadrature measurements with the STEREOscopic SECCHI imagers
• Space Weather detection, modeling and prediction from multiple perspective