A dataset provided by the European Space Agency

Name PEACE electron spectrometer
Mission Cluster
URL https://csa.esac.esa.int/csa-web/#search
DOI https://doi.org/10.5270/esa-jji2bq0
Abstract The Plasma Electron And Current Experiment (PEACE) instrument is designed to measure the electron velocity distribution in the vicinity of its host spacecraft, covering an energy range of ~1 eV to ~26 keV and detecting electrons arriving from all possible directions. Each PEACE instrument has two sensor heads, LEEA and HEEA, which are mounted on opposite sides of the spacecraft such that the instantaneous field of view of one is the same as that seen by the other half a spacecraft rotation period later. LEEA and HEEA differ only in geometric factor (HEEA admits more electrons than LEEA when measuring the same energy range). Both sensors sample 4*pi steradians per spin.
Description PEACE key scientific datasets for Cluster-1 (similar for all other Cluster spacecraft)

Moments
Dataset ID Dataset content
C1_CP_PEA_MOMENTS Electron Moments
C1_CP_PEA_MOMENTS_INERT Velocity moments (Inertial frame ISR2 and GSE)


Pitch Angle Distributions
Dataset ID Dataset content
C1_CP_PEA_PITCH_SPIN_DPFlux Electron Pitch Angle distribution (Spin-resolution, HEEA and LEEA sensors)
C1_CP_PEA_PITCH_FULL_DPFlux Electron Pitch Angle distribution (Full spin-resolution, HEEA and LEEA sensors)
C1_CP_PEA_PITCH_FULL_LAR_DPFlux Electron Pitch Angle distribution (Full spin-resolution, HEEA and LEEA sensors, at least one of the sensor is in LAR sweep mode)
C1_CP_PEA_PITCH_3DRH_DPFlux Electron Pitch Angle distribution (Standard resolution from the HEEA sensor)
C1_CP_PEA_PITCH_3DRL_DPFlux Electron Pitch Angle distribution (Standard resolution from the LEEA sensor)
C1_CP_PEA_PITCH_3DXH_DPFlux Electron Pitch Angle distribution (Best resolution, HEEA sensor)
C1_CP_PEA_PITCH_3DXL_DPFlux Electron Pitch Angle distribution (Best resolution, LEEA sensor)
C1_CP_PEA_PITCH_3DXLARH_DPFlux Electron Pitch Angle distribution (Best resolution, LAR mode, HEEA sensor)
C1_CP_PEA_PITCH_3DXLARL_DPFlux Electron Pitch Angle distribution (Best resolution, LAR mode, LEEA sensor)


3D particle distributions
Dataset ID Dataset content
C1_CP_PEA_3DRH_DPFlux 3D particle distribution (HEEA sensor, standard resolution)
C1_CP_PEA_3DRL_DPFlux 3D particle distribution (LEEA sensor, standard resolution)
C1_CP_PEA_3DXH_DPFlux 3D particle distribution (HEEA sensor, best resolution)
C1_CP_PEA_3DXL_DPFlux 3D particle distribution (LEEA sensor, best resolution)
C2_CP_PEA_3DXPAH_DPFlux 2D particle distribution (HEEA sensor, best resolution)
C1_CP_PEA_3DXPAL_DPFlux 2D particle distribution (LEEA sensor, best resolution)
C1_CP_PEA_3DRH_DPFlux 3D particle distribution (HEEA sensor, standard resolution)
C1_CP_PEA_3DRL_DPFlux 3D particle distribution (LEEA sensor, standard resolution)
C1_CP_PEA_3DXPH_DPFlux 3D particle distribution (HEEA sensor, enhanced resolution)
C1_CP_PEA_3DXPL_DPFlux 3D particle distribution (LEEA sensor, enhanced resolution)
C1_CP_PEA_3DXLARH_DPFlux 3D particle distribution (HEEA sensor, best resolution, LAR mode)
C1_CP_PEA_3DXLARL_DPFlux 3D particle distribution (LEEA sensor, best resolution, LAR mode)
C1_CP_PEA_3DXPLARH_DPFlux 3D particle distribution (HEEA sensor, enhanced resolution, LAR mode)
C1_CP_PEA_3DXPLARL_DPFlux 3D particle distribution (LEEA sensor, enhanced resolution, LAR mode)

Pitch angle and 3D particle distribution are also provided in particle energy flux and phase space density units, on top of count/s for 3D particle distribution only.
Publication Johnstone, A.D., et al., Peace: A Plasma Electron and Current Experiment, Space Sci. Rev., 79, 351-398, 1997; https://doi.org/10.1023/A:1004938001388
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 Andrew Fazakerley, Principal Investigator, MSSL/University College London, United Kingdom
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).