Suites

The Sun-Earth Connection Coronal and Heliospheric Investigation (SECCHI) is a suite of remote-sensing instruments consisting of an extreme ultraviolet imager, two white-light coronagraphs, and a heliospheric imager. These instruments are studying the 3-D evolution of coronal mass ejections—the most energetic eruptions on the sun and primary cause of major geomagnetic storms—from their origin at the sun's surface through the corona and interplanetary medium to their eventual impact at Earth. The principal investigator for the SECCHI instrument suite is Russell Howard of the Naval Research Laboratory.

The In situ Measurements of PArticles and CME Transients (IMPACT) investigation provides measurements of the solar wind electrons, interplanetary magnetic fields, and solar energetic particles. IMPACT comprises seven instruments including a solar wind electron analyzer, a magnetometer, and an array of particle detectors measuring the energetic ions and electrons accelerated in coronal mass ejection (CME) shocks and in solar flares. IMPACT's principal investigator is Janet Luhmann of the University of California, Berkeley.