Abstract
The Cluster Active Archive (CAA) aims at preserving the four Cluster spacecraft data, so that they are usable in the long-term by the scientific community as well as by the instrument team PIs and Co-Is. This implies that the data are filed together with the descriptive and documentary elements making it possible to select and interpret them. The CIS (Cluster Ion Spectrometry) experiment is a comprehensive ionic plasma spectrometry package onboard the four Cluster spacecraft, capable of obtaining full three-dimensional ion distributions (about 0–40 keV/e) with a time resolution of one spacecraft spin (4 s) and with mass-per-charge composition determination. The CIS package consists of two different instruments, a Hot Ion Analyser (HIA) and a time-of-flight ion Composition Distribution Function (CODIF) analyser, plus a sophisticated dual-processor based instrument control and data processing system (DPS). For the archival of the CIS data a multi-level approach has been adopted. The CAA archival includes processed raw data (Level 1 data), moments of the ion distribution functions (Level 2 data), and calibrated high-resolution data in a variety of physical units (Level 3 data). The latter are 3-D ion distribution functions. In addition, a software package has been developed to allow the CAA user to interactively calculate partial or total moments of the ion distributions. The CIS data archive includes also experiment documentation, graphical products for browsing through the data, and data caveats. Given the complexity of an ion spectrometer, and the variety of its operational modes, each one being optimised for a different magnetospheric region or measurement objective, consultation of the data caveats by the end user will always be a necessary step in the data analysis.
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Acknowledgements
The CIS Team is grateful to ESA, for the support supplied in operating the instrument and in preparing the CIS data for the CAA. CIS archival activities at CESR are jointly funded by ESA, by CNES and by CNRS. Activities in the USA are funded by NASA.
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Dandouras, I. et al. (2010). Cluster Ion Spectrometry (CIS) Data in the Cluster Active Archive (CAA). In: Laakso, H., Taylor, M., Escoubet, C. (eds) The Cluster Active Archive. Astrophysics and Space Science Proceedings. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3499-1_3
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