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Data Access
FTPS from the MMS SDC (not with most browsers)
HTTPS from the MMS SDC
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
CDAWeb
WebService:
CDAWeb Programmatic Data Access
HAPI: CDAWeb HAPI Server
MMS 2 Electric Double Probe (EDP) Spacecraft Potential, Level 2 (L2), Slow Mode, 0.125 s Data
var authors='Ergun, Robert, E.; Lindqvist, Per-Arne; Torbert, Roy, B.; Ahmadi, Narges; Graham, Daniel, Bruce; Burch, James, L.';
document.write(authors);
(2022).
MMS 2 Electric Double Probe (EDP) Spacecraft Potential, Level 2 (L2), Slow Mode, 0.125 s Data.
[Data set].
Laboratory for Atmospheric and Space Physics; Space Physics Data Facility.
https://doi.org/10.48322/mgay-bk26. Accessed on document.write(currentDateStr);.
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or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication.
ResourceID
spase://NASA/NumericalData/MMS/2/FIELDS/EDP/Slow/Level2/SpacecraftPotential/PT0.125S
Description
Electric Double Probe, Dual Probe Spacecraft Potential, Level 2, Slow Survey Data. Spacecraft potential is etstimatrd by averaging measurements of the probe-to-spacecraft potential from several probes.
Metadata Rights
CC0-1.0:
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.
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Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/MMS/2/FIELDS/EDP/Slow/Level2/SpacecraftPotential/PT0.125S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
MMS 2 Electric Double Probe (EDP) Spacecraft Potential, Level 2 (L2), Slow Mode, 0.125 s Data
AlternateName
MMS2_EDP_SLOW_L2_SCPOT
DOI
https://doi.org/10.48322/mgay-bk26
ReleaseDate
2026-07-21 12:05:56Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2022-08-04 12:34:56.789Z
Note
Added DOI and PublicationInfo minted by LFB, updated the RepositoryID, updated the SPDF MetadataContact Person to Robert M. Candey, metadata updated to SPASE 2.4.1, reviewed by LFB 20220803
RevisionEvent
ReleaseDate
2023-03-04 12:34:56.789Z
Note
Standardized the ResourceName Format, Set AlternateName equal to the ProductKey, Revised the Acknowledgement, PublicationInfo Authors, and Contact Person list per request of the MMS EDP team, metadata updated to SPASE 2.5.0, reviewed by LFB 20230304
RevisionEvent
ReleaseDate
2025-10-03 10:41:05Z
Note
Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:30:03Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:24:48Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:05:56Z
Note
Added HelioData InformationURL. JWL
Description
Electric Double Probe, Dual Probe Spacecraft Potential, Level 2, Slow Survey Data. Spacecraft potential is etstimatrd by averaging measurements of the probe-to-spacecraft potential from several probes.
Acknowledgement
Please acknowledge R.E. Ergun, P.-A. Lindqvist, R.B. Torbert, N. Ahmadi, D.B. Graham, and J.L. Burch for use of these data
PublicationInfo
Authors
Ergun, Robert, E.; Lindqvist, Per-Arne; Torbert, Roy, B.; Ahmadi, Narges; Graham, Daniel, Bruce; Burch, James, L.
PublicationDate
2022-01-01 00:00:00Z
PublishedBy
Laboratory for Atmospheric and Space Physics; Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
InstrumentLeadCoInvestigator
spase://SMWG/Person/Robert.E.Ergun
2.
InstrumentLeadCoInvestigator
spase://SMWG/Person/Per-Arne.Lindqvist
3.
InstrumentLeadCoInvestigator
spase://SMWG/Person/Roy.B.Torbert
4.
CoInvestigator
spase://SMWG/Person/Narges.Ahmadi
5.
CoInvestigator
spase://SMWG/Person/Daniel.Bruce.Graham
6.
PrincipalInvestigator
spase://SMWG/Person/James.L.Burch
7.
HostContact
spase://SMWG/Person/MMS_SDC_POC
8.
MetadataContact
spase://SMWG/Person/Robert.M.Candey
9.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
At NASA GSFC
URL
https://mms.gsfc.nasa.gov/
Description
Magnetospheric Multiscale (MMS) mission home page
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/MMS_2_FIELDS_EDP_Slow_Level2_SpacecraftPotential_PT0.125S
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VSPO/NumericalData/MMS/2/FIELDS/EDP/Slow/Level2/SpacecraftPotential/PT0.125S
AccessInformation
RepositoryID
spase://SMWG/Repository/UCOLO/LASP/MMS_SDC
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from the MMS SDC (not with most browsers)
URL
ftps://lasp.colorado.edu/mms/sdc/public/data/mms2/edp/slow/l2/scpot/
Description
In CDF via ftp from the MMS Science Data Center
AccessURL
Name
HTTPS from the MMS SDC
URL
https://lasp.colorado.edu/mms/sdc/public/data/mms2/edp/slow/l2/scpot/
Description
In CDF via http from the MMS Science Data Center
Format
CDF
Encoding
None
Acknowledgement
Please acknowledge R.E. Ergun, P.-A. Lindqvist, R.B. Torbert, N. Ahmadi, D.B. Graham, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/mms/mms2/edp/slow/l2/scpot/
Description
In CDF via ftp from SPDF
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/mms/mms2/edp/slow/l2/scpot/
Description
In CDF via http from SPDF
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=MMS2_EDP_SLOW_L2_SCPOT&index=sp_phys
ProductKey
MMS2_EDP_SLOW_L2_SCPOT
Description
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/mms/mms2/edp/slow/l2/scpot/$Y/$m
AccessFilenameTemplate
mms2_edp_slow_l2_scpot_$Y$m$d$H$M$S_$v.cdf
Acknowledgement
Please acknowledge R.E. Ergun, P.-A. Lindqvist, R.B. Torbert, N. Ahmadi, D.B. Graham, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb Programmatic Data Access
URL
https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/MMS2_EDP_SLOW_L2_SCPOT/clientLibraryExample/
Style
WebService
ProductKey
MMS2_EDP_SLOW_L2_SCPOT
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
Please acknowledge R.E. Ergun, P.-A. Lindqvist, R.B. Torbert, N. Ahmadi, D.B. Graham, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
MMS2_EDP_SLOW_L2_SCPOT
Description
Web Service to this product using the HAPI interface
Format
CSV
Acknowledgement
Please acknowledge R.E. Ergun, P.-A. Lindqvist, R.B. Torbert, N. Ahmadi, D.B. Graham, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/MMS/2/FIELDS/ADP
spase://SMWG/Instrument/MMS/2/FIELDS/SDP
MeasurementType
ElectricField
TemporalDescription
TimeSpan
StartDate
2015-07-20 00:00:00Z
RelativeStopDate
-P2M
Cadence
PT0.125S
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
ObservedRegion
Earth.Magnetosphere.Main
ObservedRegion
Earth.Magnetosphere.RadiationBelt
ObservedRegion
Earth.NearSurface.EquatorialRegion
ObservedRegion
Earth.NearSurface.Plasmasphere
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Epoch Time
ParameterKey
mms2_edp_epoch_slow_l2
Description
Epoch Time Tags, Interval Centered, in Terrestrial Time 2000 (TT2000)
Caveats
This parameter exhibits an increasing monotonic progression.
Cadence
PT0.125S
Units
ns
UnitsConversion
1.0e-9>s
ValidMin
1990-01-01T00:00:00.000000000
ValidMax
2100-01-01T00:00:01.000000000
FillValue
9999-12-31T23:59:59.999999999
Support
SupportQuantity
Temporal
Parameter #2
Name
Spacecraft Potential
Set
Time series defined by using: MMS2_EDP_EPOCH_SLOW_L2
ParameterKey
mms2_edp_scpot_slow_l2
Description
Spacecraft Potential, Level 2, Slow Survey
Cadence
PT0.125S
Units
V
UnitsConversion
1.0>V
RenderingHints
DisplayType
TimeSeries
AxisLabel
ScPot
ValueFormat
f8.3
ValidMin
-120.0
ValidMax
50.0
FillValue
-1.0e+31
Field
FieldQuantity
Potential
Parameter #3
Name
Average Probe to Spacecraft Potential
Set
Time series defined by using: MMS2_EDP_EPOCH_SLOW_L2
ParameterKey
mms2_edp_psp_slow_l2
Description
Average of the Probe to Spacecraft Potential Values, Level 2, Slow Survey
Cadence
PT0.125S
Units
V
UnitsConversion
1.0>V
RenderingHints
DisplayType
TimeSeries
AxisLabel
Probe2Sc pot
ValueFormat
f8.3
ValidMin
-120.0
ValidMax
50.0
FillValue
-1.0e+31
Field
Qualifier
Average
FieldQuantity
Potential
Parameter #4
Name
Probe to Spacecraft Potential, Individual Probe
Set
Time series defined by using: MMS2_EDP_EPOCH_SLOW_L2
ParameterKey
mms2_edp_dcv_slow_l2
Description
Probe to Spacecraft Potential, Individual Probes, Level 2, Slow Survey
Cadence
PT0.125S
Units
V
UnitsConversion
1.0>V
RenderingHints
DisplayType
TimeSeries
ValueFormat
f8.3
Structure
Size
6
Element
Name
PSP_P1
Index
1
Element
Name
PSP_P2
Index
2
Element
Name
PSP_P3
Index
3
Element
Name
PSP_P4
Index
4
Element
Name
PSP_P5
Index
5
Element
Name
PSP_P6
Index
6
ValidMin
-120.0
ValidMax
50.0
FillValue
-1.0e+31
Field
FieldQuantity
Potential
Parameter #5
Name
Status Bitmask
Set
Time series defined by using: MMS2_EDP_EPOCH_SLOW_L2
ParameterKey
mms2_edp_bitmask_slow_l2
Description
Status Bitmask, Values Used: Bitmask and 0x001: True when probe(s) are disabled, Bitmask and 0x002: True when probe(s) have bad bias settings, Bitmask and 0x004: True when probe(s) are saturated, Bitmask and 0x008: True when probe(s) are saturated due to low density, Bitmask and 0x016: True when probe(s) are sweeping bias, Bitmask and 0x032: True when SDP probe(s) are in shadow from the ADP booms, Bitmask and 0x064: True when ASPOC is emitting non-zero current
Cadence
PT0.125S
RenderingHints
AxisLabel
Bitmask
ValueFormat
i7
ValidMin
0
ValidMax
65534
FillValue
65535
Support
SupportQuantity
Other
Parameter #6
Name
Data Quality indicator
Set
Time series defined by using: MMS2_EDP_EPOCH_SLOW_L2
ParameterKey
mms2_edp_quality_slow_l2
Description
Data Quality Indicator: 4, Best; 3, Good; 2, Data OK, Use with some Caution; 1, Bad Data, Use with Caution; 0, Really Bad Data or No Data
Cadence
PT0.125S
RenderingHints
DisplayType
TimeSeries
AxisLabel
ScPot quality
ValueFormat
i7
ValidMin
0
ValidMax
4
FillValue
255
Support
SupportQuantity
Other
Parameter #7
Name
Epoch Time Delta Plus/Minus
ParameterKey
mms2_edp_deltap_slow_l2
Description
The Time Interval of Data Measurements is given by the Epoch Time Tags and Delta Plus/Minus
Cadence
PT0.125S
Units
ns
UnitsConversion
1.0e-9>s
RenderingHints
ValueFormat
i19
ValidMin
61000
ValidMax
62500000
FillValue
-9223372036854775808
Support
SupportQuantity
Temporal