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Cluster PEACE Summary Parameters

ResourceID
spase://CNES/NumericalData/CDPP-Archive/Cluster/PEACE_SP/CLU_SP_CL_PEA

Description
This data set contains the Cluster PEACE Summary Parameters (one minute average). The parameters are the electron density, velocity, temperature and heat flux (derived from a subset of the moment sums calculated onboard) and instrument status. Caveats At the time of writing (March 2002) the moments data provided to CSDS are being derived only from HEEA. Thus the minimum measured electron energy is typically about 34 eV opposed to 10 eV when LEEA is included. This approach is an initial response to the frequently occurring situation that the spacecraft potential does rise above 10 volts. The spacecraft potential is at times above 34 volts, in which case the moments calculations will be include measurements of both plasma and spacecraft electrons and will not accurately describe the plasma population. These cases can usually be recognised as they have particularly high density. The spacecraft potential, when uncontrolled by ASPOC, can often reach such values, particularly in thinner plasmas (e.g., magnetotail lobes, polar cap, etc.) The CSDS Quicklook plots show spacecraft potential from EFW which will further inform the interested reader about which regions characteristically have high spacecraft potential. ASPOC operations do not occur on Spacecraft 1 at all. On about 50% of the orbits there are no ASPOC operations on the other spacecraft, and operations are typically for less than 10 hours at a time when ASPOC is in use. The PEACE Team are reconsidering their approach to provision of and validation of electron moments data to the CSDS, in the light of the problems with spacecraft potential. The PEACE team will report on the outcome in a future update of this document. Please for further relevant information consult the PEACE home page (https://www.mssl.ucl.ac.uk/www_plasma/missions/cluster/).

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NumericalData

ResourceID
spase://CNES/NumericalData/CDPP-Archive/Cluster/PEACE_SP/CLU_SP_CL_PEA
ResourceHeader
ResourceName
Cluster PEACE Summary Parameters
DOI
https://doi.org/10.24400/802406/87m7-8pf9
ReleaseDate
2022-02-28 09:20:14Z
Description
This data set contains the Cluster PEACE Summary Parameters (one minute average). The parameters are the electron density, velocity, temperature and heat flux (derived from a subset of the moment sums calculated onboard) and instrument status. Caveats At the time of writing (March 2002) the moments data provided to CSDS are being derived only from HEEA. Thus the minimum measured electron energy is typically about 34 eV opposed to 10 eV when LEEA is included. This approach is an initial response to the frequently occurring situation that the spacecraft potential does rise above 10 volts. The spacecraft potential is at times above 34 volts, in which case the moments calculations will be include measurements of both plasma and spacecraft electrons and will not accurately describe the plasma population. These cases can usually be recognised as they have particularly high density. The spacecraft potential, when uncontrolled by ASPOC, can often reach such values, particularly in thinner plasmas (e.g., magnetotail lobes, polar cap, etc.) The CSDS Quicklook plots show spacecraft potential from EFW which will further inform the interested reader about which regions characteristically have high spacecraft potential. ASPOC operations do not occur on Spacecraft 1 at all. On about 50% of the orbits there are no ASPOC operations on the other spacecraft, and operations are typically for less than 10 hours at a time when ASPOC is in use. The PEACE Team are reconsidering their approach to provision of and validation of electron moments data to the CSDS, in the light of the problems with spacecraft potential. The PEACE team will report on the outcome in a future update of this document. Please for further relevant information consult the PEACE home page (https://www.mssl.ucl.ac.uk/www_plasma/missions/cluster/).
Contacts
Role Person StartDate StopDate Note
1. PrincipalInvestigator spase://CNES/Person/CDPP-Archive/Andrew.Fazakerley
AccessInformation
RepositoryID
Availability
Online
AccessURL
Name
REGARDS
URL
Description
Access via CNES Data Archive for CDPP
Format
CDF
InstrumentIDs
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
2001-01-01 00:00:00Z
StopDate
2017-12-31 00:00:00Z
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
ObservedRegion
Earth.Magnetosphere.Main
ObservedRegion
Earth.Magnetosphere.Polar
ObservedRegion
Earth.Magnetosphere.RadiationBelt
ObservedRegion
Earth.NearSurface.AuroralRegion
ObservedRegion
Earth.NearSurface.Ionosphere
ObservedRegion
Earth.NearSurface.Plasmasphere
ObservedRegion
Earth.NearSurface.PolarCap
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Cluster PEACE Summary Param Electron Number Density
Description
Cluster Summary Parameter Plasma Electron and Current Experiment electron number density at spin time resolution
Units
cm^-3
UnitsConversion
1e6>m^-3
Particle
ParticleType
Electron
Qualifier
Scalar
ParticleQuantity
NumberDensity
Parameter #2
Name
Cluster PEACE Summary Param Electron Velocity
Description
Cluster Summary Parameter Plasma Electron and Current Experiment electron velocity at spin time resolution
Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Particle
ParticleType
Electron
Qualifier
Vector
ParticleQuantity
Velocity
Parameter #3
Name
Cluster PEACE Summary Param Parallel Electron Temperature
Description
Cluster Summary Parameter Plasma Electron and Current Experiment parallel electron temperature at spin time resolution
Units
MK
UnitsConversion
1e6>K
Particle
ParticleType
Electron
Qualifier
Parallel
ParticleQuantity
Temperature
Parameter #4
Name
Cluster PEACE Summary Param Perpendicular Electron Temperature
Description
Cluster Summary Parameter Plasma Electron and Current Experiment perpendicular electron temperature at spin time resolution
Units
MK
UnitsConversion
1e6>K
Particle
ParticleType
Electron
Qualifier
Perpendicular
ParticleQuantity
Temperature
Parameter #5
Name
Cluster PEACE Summary Param Parallel Electron Heat Flux
Description
Cluster Summary Parameter Plasma Electron and Current Experiment parallel electron heat flux at spin time resolution
Units
uJ m^-2 s^-1
UnitsConversion
1e-6>J m^-2 s^-1
Particle
ParticleType
Electron
Qualifier
Parallel
ParticleQuantity
HeatFlux