A dataset provided by the European Space Agency

Name CIS ion spectrometer
Mission Cluster
URL https://csa.esac.esa.int/csa-web/#search
DOI https://doi.org/10.5270/esa-ceffumg
Abstract The CIS (Cluster Ion Spectrometry) experiment is a comprehensive ionic plasma spectrometry package onboard the Cluster spacecraft,capable of obtaining full three-dimentional ion distributions (about 0 to 40 KeV/e) with a time resolution of one spacecraft spin (4 sec) and with mass-per-charge composition determination. The CIS package consists of two different instruments, a time-of-flight ion Composition and Distribution Function analyser (CODIF, or CIS-1) and a Hot Ion Analyser (HIA, or CIS-2).
Description CIS key scientific datasets from Cluster 1 (similar for Cluster 3, CODIF only on C4, no data from CIS on C2)

Dataset ID Dataset content
C1_CP_CIS-HIA_ONBOARD_MOMENTS Ion Moments (High and Low Sensitivity)
C1_CP_CIS-CODIF_HS_H1_MOMENTS H+ Moments (High sensitivity)
C1_CP_CIS-CODIF_HS_He1_MOMENTS He+ Moments (High sensitivity)
C1_CP_CIS-CODIF_HS_O1_MOMENTS O+ Moments (High sensitivity)

Pitch-Angle Distributions
C1_CP_CIS-HIA_PAD_HS_MAG_IONS_PF Ion pitch angle distribution (High sensitivity)
C1_CP_CIS-CODIF_PAD_HS_H1_PF H+ pitch angle distribution (High sensitivity)
C1_CP_CIS-CODIF_PAD_HS_He1_PF He+ pitch angle distribution (High sensitivity)
C1_CP_CIS-CODIF_PAD_HS_O1_PF O+ pitch angle distribution (High sensitivity)

3D particle distribution
Dataset ID Dataset content
C1_CP_CIS-HIA_HS_MAG_IONS_PF3D Ion distributions on C1, High-Sensitivity, Magnetospheric Mode, in Differential Particle Flux
C1_CP_CIS-HIA_HS_SW_IONS_PF3D Ion distributions on C1, High-Sensitivity, Solar-Wind mode, in Differential Particle Flux
C1_CP_CIS-HIA_LS_SW_IONS_PF3D Ion distributions on C1, Low-Sensitivity, Solar Wind mode, in Differential Particle Flux
C1_CP_CIS-CODIF_HS_H1_PF 3D Proton distributions on C1, High-Sensitivity, in Differential Particle Flux
C1_CP_CIS-CODIF_HS_He1_PF 3D Helium+ distributions on C1, High-Sensitivity, in Differential Particle Flux
C1_CP_CIS-CODIF_HS_He2_PF 3D Alpha particle distributions on C1, High-Sensitivity, in Differential Particle Flux
C1_CP_CIS-CODIF_HS_O1_PF 3D Oxygen+ distributions on C1, High-Sensitivity, in Differential Particle Flux

3D particle distribution are also provided in Particle energy flux and phase space density units. Data collected by the Retarding Potential Analyzer mode used in the plasmasphere are also available together with omnidirectional particle energy flux.
Publication Rème, H., et al., First multispacecraft ion measurements in and near the Earth‘s magnetosphere with the identical Cluster ion spectrometry (CIS) experiment, Ann. Geophys., 19, 1303, 2001; https://doi.org/10.5194/angeo-19-1303-2001
Rème, H., et al., The Cluster Ion Spectrometry (CIS) Experiment, Space Sci. Rev., 79, 303-350, 1997; https://doi.org/10.1023/A:1004929816409
Temporal Coverage 2001-02-01 - current
Mission Description Cluster is the first constellation of four scientific spacecraft to study the Earth-Sun connection in three dimensions. Cluster offers unique opportunities to investigate physical processes in near-Earth space. Those processes are essential to study and understand the effects of the Sun on the vast Earth’s environment that is a highly varying system both in time and space. The four Cluster spacecraft in a polar orbit are unique in their ability to obtain a three-dimensional picture of medium and large-scale plasma structures. The varying Cluster spacecraft formation from 3 km to a few tens of thousands kilometres along the orbit enables multi-point local measurements of different regions at different scales that cannot be done with any other space mission.

Escoubet, C.P., et al., The Cluster mission, Ann. Geophys., 19, 1197, 2001; https://doi.org/10.5194/angeo-19-1197-2001
Escoubet, C.P, et al., Cluster - Science and Mission Overview, Space Sci. Rev., 79, 11-32, 1997; https://doi.org/10.1023/A:1004923124586
Creator Contact Iannis Dandouras, Principal Investigator, Institut de recherche en astrophysique et planétologie, CNRS and Université de Toulouse III Paul Sabatier, France, idandouras@irap.omp.eu
Publisher And Registrant European Space Agency
Credit Guidelines When publishing any works related to this experiment, please cite the experiment DOI found herein and the Cluster mission DOI (where appropriate).