Space Weather Studies at the Planets Enabled by the STEREO Mission

Details Space Weather Studies at the Planets Enabled by the STEREO Mission Space Weather Studies at the Planets Enabled by the STEREO Mission

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.4502l&link_type=abstract

American Astronomical Society, DPS meeting #38, #45.02; Bulletin of the American Astronomical Society, Vol. 38, p.567

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Scientific paper

Several important planetary investigations now underway as part of the Messenger, Venus Express, Mars Express and Cassini missions depend on a knowledge of the solar and local interplanetary conditions. For example: Messenger will resolve the question of whether Mercury's structured and variable sodium missions detected on the ground are a result of solar wind and interplanetary field control, Venus and Mars Express are monitoring the atmospheric ion escape from these terrestrial planets to evaluate the solar EUV intensity and solar wind dynamic pressure-related variations, and Cassini results suggest that Titan's would-be ion torus is evidently lost by frequent intrusions of the solar wind into the Titan orbit radius. These can be considered part of a broader definition of "space weather" effects at the planets, together with the responses of the planet-solar wind interactions to events such as Coronal Mass Ejections (CMEs). None of these missions involves regular upstream solar wind measurements to allow interpretation of these observations, although some local on-board plasma and field information is useful for this purpose. The twin-spacecraft STEREO (Solar TERrEstrial Observatory) mission, launched this year, provides new options for monitoring solar and interplanetary conditions from perspectives other than that of the Earth. We describe the locations of the STEREO spacecraft relative to the locations of the planets during the upcoming two years of its prime mission, as well as the instrument complement. The STEREO in-situ data are available on-line for general use approximately one month after receipt on the ground. Furthermore, models are available at the CCMC to put these measurements in the context of conditions in the broader heliosphere.

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