HDPWS

Geotail - LEP - editor B: ions

ResourceID
spase://CNES/NumericalData/CDPP-AMDA/GEOTAIL/LEP/gtl-lep-edb

Description
12-second Editor-A low-energy particle data from the Geotail spacecraft. Editor-A data are only acquired with the real-time operation in Usuda Deep Space Center (UDSC),Japan, while the Editor-B data are 24-hours continuouslyrecorded in the onboard tape recorders and are dumpedover the NASA/JPL Deep Space Network (DSN) stations. The ion energy analyzer (LEP-EAi) has two energy scan mode: RAM-A (60 eV to 40 keV) and RAM-B (5 keV to 40 keV). RAM-B is selected to protect the very sensitive detector from intense low energy fluxes that are usually seen in the solar wind and magnetosheath. The energy scan mode is automatically selected onboard depending on incoming ion fluxes. At present, only the ion moments in the RAM-A mode are listed for the LEP-EAi data. The ion moment data of the solar wind analyzer (LEP-SW) should be used only qualitatively. The LEP-SW ion moments are listed when the energy scan mode of LEP-EAi is RAM-B. CPI/SWEA and LEP measurement are expected to be used in a complementary way. LEP is highly sensitive and is dedicated to measure tenuous plasma of the magnetosphere. However, when GEOTAIL is in the interplanetary, LEP generally scans only the high energy (> 5 KeV) part of the ion distribution. This automated mode allows to assure long term preservation of the LEP detectors. The LEP ion moments obtained in the inteerplanetary medium should be used only for qualitative purposes. The ion moments in the interplanetary medium are provided by the CPI/SWEA instrument designed for measuring the denser magnetosheath and solar wind plasma.

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NumericalData

ResourceID
spase://CNES/NumericalData/CDPP-AMDA/GEOTAIL/LEP/gtl-lep-edb
ResourceHeader
ResourceName
Geotail - LEP - editor B: ions
ReleaseDate
2020-08-16 22:33:50Z
Description
12-second Editor-A low-energy particle data from the Geotail spacecraft. Editor-A data are only acquired with the real-time operation in Usuda Deep Space Center (UDSC),Japan, while the Editor-B data are 24-hours continuouslyrecorded in the onboard tape recorders and are dumpedover the NASA/JPL Deep Space Network (DSN) stations. The ion energy analyzer (LEP-EAi) has two energy scan mode: RAM-A (60 eV to 40 keV) and RAM-B (5 keV to 40 keV). RAM-B is selected to protect the very sensitive detector from intense low energy fluxes that are usually seen in the solar wind and magnetosheath. The energy scan mode is automatically selected onboard depending on incoming ion fluxes. At present, only the ion moments in the RAM-A mode are listed for the LEP-EAi data. The ion moment data of the solar wind analyzer (LEP-SW) should be used only qualitatively. The LEP-SW ion moments are listed when the energy scan mode of LEP-EAi is RAM-B. CPI/SWEA and LEP measurement are expected to be used in a complementary way. LEP is highly sensitive and is dedicated to measure tenuous plasma of the magnetosphere. However, when GEOTAIL is in the interplanetary, LEP generally scans only the high energy (> 5 KeV) part of the ion distribution. This automated mode allows to assure long term preservation of the LEP detectors. The LEP ion moments obtained in the inteerplanetary medium should be used only for qualitative purposes. The ion moments in the interplanetary medium are provided by the CPI/SWEA instrument designed for measuring the denser magnetosheath and solar wind plasma.
Acknowledgement
In any publications, the use of the Geotail data should be acknowledged, for example, as "Geotail magnetic field data were provided by Y. Saito, JAXA in Japan."
Contacts
Role Person StartDate StopDate Note
1. PrincipalInvestigator spase://SMWG/Person/Yoshifumi.Saito
2. Scientist spase://SMWG/Person/Donald.H.Fairfield

InformationURL
Name
The Geotail Low Energy Particle Experiment (LEP)
URL
Description
Reprint of Mukai, T., S. Machida, Y. Saito, M. Hirahara, T. Terasawa, N. Kaya, T. Obara, M. Ejiri, and A. Nishida, The low energy particle (LEP) experiment onboard the Geotail satellite, J. Geomag. Geoelectr., 46, 669-692, 1994.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDPP/AMDA HAPI Server
URL
Style
HAPI
ProductKey
gtl-lep-edb
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
Thank you for acknowledging the use of AMDA in publications with wording like "Data analysis was performed with the AMDA science analysis system provided by the Centre de Données de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Université Paul Sabatier, Toulouse". See the Rules of the road at https://amda.cdpp.eu/help/policy.html . Please acknowledge the Data Providers.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDPP/AMDA Web application
URL
Description
Access to Data via CDPP/AMDA Web application.
Format
CSV
Format
VOTable
Format
CDF
Format
PNG
Acknowledgement
Thank you for acknowledging the use of AMDA in publications with wording like "Data analysis was performed with the AMDA science analysis system provided by the Centre de Données de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Université Paul Sabatier, Toulouse". See the Rules of the road at https://amda.cdpp.eu/help/policy.html . Please acknowledge the Data Providers.
ProviderName
DARTS
InstrumentIDs
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1993-10-05 00:00:34Z
StopDate
2019-12-31 23:33:34Z
Cadence
PT12S
ObservedRegion
Heliosphere.NearEarth
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
Caveats
Please use the Editor-A LEP dataset prior to the Editor-B LEP dataset since plasma moments in the Editor-A data are more reliable. (Plasma moments inthe Editor-B are calculated onboard.) The ion moment data of the solar wind analyzer (LEP-SW) should be used only qualitatively.
Parameter #1
Name
density
ParameterKey
gtl_lepb_dens
Description
Ion density
UCD
phys.density;phys.atmol.ionStage
Caveats
Qualitative use only if Energy Scan Code = 2, i.e. if the energy scan mode is RAM-B/SW.
Units
cm^-3
UnitsConversion
1e-6>m-3
RenderingHints
DisplayType
TimeSeries
ValidMin
0.0
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Moment
ParticleQuantity
NumberDensity
EnergyRange
Low
60
High
38150
Units
eV
Parameter #2
Name
v_gse
ParameterKey
gtl_lepb_v
Description
Ion velocity in GSE coordinates
UCD
phys.veloc;phys.atmol.ionStage
Caveats
Qualitative use only if Energy Scan Code = 2, i.e. if the energy scan mode is RAM-B/SW.
Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
TimeSeries
Structure
Size
3
Element
Name
vx
Qualifier
Component.I
Index
1
ParameterKey
gtl_lepb_v(0)
ValidMin
-2000
ValidMax
2000
FillValue
-1.0E31
Element
Name
vy
Qualifier
Component.J
Index
2
ParameterKey
gtl_lepb_v(1)
ValidMin
-2000
ValidMax
2000
FillValue
-1.0E31
Element
Name
vz
Qualifier
Component.K
Index
3
ParameterKey
gtl_lepb_v(2)
ValidMin
-2000
ValidMax
2000
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Moment
ParticleQuantity
FlowVelocity
EnergyRange
Low
60
High
38150
Units
eV
Parameter #3
Name
v_gsm
ParameterKey
gtl_lepb_v_gsm
Description
Ion velocity in GSM coordinates
UCD
phys.veloc;phys.atmol.ionStage
Caveats
Qualitative use only if Energy Scan Code = 2, i.e. if the energy scan mode is RAM-B/SW.
Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
RenderingHints
DisplayType
TimeSeries
Structure
Size
3
Element
Name
vx
Qualifier
Component.I
Index
1
ParameterKey
gtl_lepb_v_gsm(0)
ValidMin
-2000
ValidMax
2000
FillValue
-1.0E31
Element
Name
vy
Qualifier
Component.J
Index
2
ParameterKey
gtl_lepb_v_gsm(1)
ValidMin
-2000
ValidMax
2000
FillValue
-1.0E31
Element
Name
vz
Qualifier
Component.K
Index
3
ParameterKey
gtl_lepb_v_gsm(2)
ValidMin
-2000
ValidMax
2000
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Moment
ParticleQuantity
FlowVelocity
EnergyRange
Low
60
High
38150
Units
eV
Parameter #4
Name
t_sc
ParameterKey
gtl_lepb_t
Description
Ion temperature in satellite coordinates
UCD
phys.temperature;phys.atmol.ionStage
Caveats
Qualitative use only if Energy Scan Code = 2, i.e. if the energy scan mode is RAM-B/SW.
Units
eV
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SC
RenderingHints
DisplayType
TimeSeries
Structure
Size
2
Element
Name
Tyy
Index
1
ParameterKey
gtl_lepb_t(0)
ValidMin
-10
ValidMax
10000
FillValue
-1.0E31
Element
Name
Tzz
Index
2
ParameterKey
gtl_lepb_t(1)
ValidMin
-10
ValidMax
10000
FillValue
-1.0E31
Particle
ParticleType
Proton
ParticleType
AlphaParticle
ParticleType
Ion
Qualifier
Moment
Qualifier
Parallel
Qualifier
Perpendicular
ParticleQuantity
Temperature
EnergyRange
Low
60
High
38150
Units
eV