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Published July 2004 | Published
Journal Article Open

Solar and interplanetary data from the Advanced Composition Explorer

Abstract

Since early in 1998, NASA's Advanced Composition Explorer (ACE) spacecraft has provided continuous measurements of solar wind and energetic particle activity from L1, its orbit position located approximately 0.01 AU sunward of Earth. Its mission addresses a wide range of objectives, including studying the origin and evolution of solar, interplanetary, and galactic material, the formation of the solar corona, the acceleration of the solar wind and coronal mass ejections, and the acceleration of energetic particles. In this article we review current and planned data products available from ACE and describe recent modifications to the spacecraft's orbit that will extend its lifetime and provide solar wind data closer to the Earth-Sun line.

Additional Information

© 2004 American Geophysical Union. Article first published online: 17 Jul. 2004. We thank the members of the ACE Flight Operations and Flight Dynamics teams at NASA/Goddard Space Flight Center for their sustained efforts to deliver continuous, high-quality data from Ll. We also acknowledge the vital contributions of Torn Garrard, who died not long before the launch of ACE. We are grateful to Xinlin Li for providing Figure 1.

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August 19, 2023
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October 19, 2023