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Data Access
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
CDAWeb
WebService:
CDAWeb Programmatic Data Access
HAPI: CDAWeb HAPI Server
Voyager 2 48-s Triaxial Fluxgate Magnetometer (MAG) Magnetic Field Data Near and Beyond Termination Shock in CDF Format
var authors='Burlaga, Leonard, F.';
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(2023).
Voyager 2 48-s Triaxial Fluxgate Magnetometer (MAG) Magnetic Field Data Near and Beyond Termination Shock in CDF Format.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/kgbb-j403. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/Voyager2/MAG/VIM/CDF/PT48S
Description
The main science objectives for the Voyager Interplanetary Mission, VIM, are as follows: - investigate the structure of the solar wind magnetic fields and plasma in the inner and outer heliosphere; - conduct long term study of heliospheric evolution during different phases of the 22-year solar magnetic cycle and the 11-year solar activity cycle; - study the long term solar modulation and determine the elemental and isotopic abundances of galactic cosmic ray particles in the heliosphere; - measure radial gradients, spectra, and nuclear abundances of the anomalous component of cosmic rays from acceleration at the solar wind termination shock; - investigate local particle acceleration in the interplanetary medium from solar flare shocks and corotating interaction regions; - study propagation of solar energetic particles in the heliosphere. The average magnetic field strength produced by the spacecraft at the location of the outboard magnetometer of the dual magnetometers system on Voyager 1 and Voyager 2 is about 0.1-0.2 nT, comparable to the most probable magnetic field strength in the inner heliosheath and significantly larger than the most probable magnetic field strength in the distant supersonic solar wind. The spacecraft magnetic field is a complex, time-dependent signal that must be removed from the measured magnetic field signal in order to derive the ambient magnetic fields of the solar wind and heliosheath. Corrections must also be made for spurious magnetic signals and noise associated with the telemetry system, ground tracking systems, and other factors. Extracting the signal describing the solar wind and heliosheath from the many sources of uncertainty is a complex and partly subjective process that requires understanding of the instrument and judgement based on experience in dealing with the ever-changing extraneous signals. We estimate that for the Voyager magnetic field data the 1-sigma the uncertainty of the 48-s averages for each of the components of the magnetic field BR, BT, and BN is typically +/- 0.02 nT; the uncertainty in magnitude F1 is typically +/- 0.03 nT. F1, BR, BT, and BN can differ from one another and they may vary with time, but there is no practical way to determine these uncertainties more precisely at present. References: D.B. Berdichevsky, Voyager Mission, Detailed processing of weak magnetic fields; I - Constraints to the uncertainties of the calibrated magnetic field signal in the Voyager missions, 2009; https://vgrmag.gsfc.nasa.gov/Berdichevsky-VOY_sensor_opu090518.pdf Behannon, K.W., M.H. Acuna, L.F. Burlaga, R.P. Lepping, N.F. Ness, and F.M. Neubauer, Magnetic-Field Experiment for Voyager-1 and Voyager-2, Space Science Reviews, 21 (3), 235-257, 1977. Burlaga, L.F., Merged interaction regions and large-scale magnetic field fluctuations during 1991 - Voyager-2 observations, J. Geophys. Res., 99 (A10), 19341-19350, 1994. Burlaga, L.F., N.F. Ness, Y.-M. Wang, and N.R. Sheeley Jr., Heliospheric magnetic field strength and polarity from 1 to 81 AU during the ascending phase of solar cycle 23, J. Geophys. Res., 107 (A11), 1410, 2002. Ness, N., K.W. Behannon, R. Lepping, and K.H. Schatten, J. Geophys. Res., Spacecraft studies of the interplanetary magnetic field, 76, 3564, 1971.
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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Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/Voyager2/MAG/VIM/CDF/PT48S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Voyager 2 48-s Triaxial Fluxgate Magnetometer (MAG) Magnetic Field Data Near and Beyond Termination Shock in CDF Format
DOI
https://doi.org/10.48322/kgbb-j403
ReleaseDate
2026-07-21 12:09:01Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2023-07-30 12:34:56.789Z
Note
Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727
RevisionEvent
ReleaseDate
2025-10-03 11:24:18Z
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 13:32:39Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:31:27Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:09:01Z
Note
Added HelioData InformationURL. JWL
Description
The main science objectives for the Voyager Interplanetary Mission, VIM, are as follows: - investigate the structure of the solar wind magnetic fields and plasma in the inner and outer heliosphere; - conduct long term study of heliospheric evolution during different phases of the 22-year solar magnetic cycle and the 11-year solar activity cycle; - study the long term solar modulation and determine the elemental and isotopic abundances of galactic cosmic ray particles in the heliosphere; - measure radial gradients, spectra, and nuclear abundances of the anomalous component of cosmic rays from acceleration at the solar wind termination shock; - investigate local particle acceleration in the interplanetary medium from solar flare shocks and corotating interaction regions; - study propagation of solar energetic particles in the heliosphere. The average magnetic field strength produced by the spacecraft at the location of the outboard magnetometer of the dual magnetometers system on Voyager 1 and Voyager 2 is about 0.1-0.2 nT, comparable to the most probable magnetic field strength in the inner heliosheath and significantly larger than the most probable magnetic field strength in the distant supersonic solar wind. The spacecraft magnetic field is a complex, time-dependent signal that must be removed from the measured magnetic field signal in order to derive the ambient magnetic fields of the solar wind and heliosheath. Corrections must also be made for spurious magnetic signals and noise associated with the telemetry system, ground tracking systems, and other factors. Extracting the signal describing the solar wind and heliosheath from the many sources of uncertainty is a complex and partly subjective process that requires understanding of the instrument and judgement based on experience in dealing with the ever-changing extraneous signals. We estimate that for the Voyager magnetic field data the 1-sigma the uncertainty of the 48-s averages for each of the components of the magnetic field BR, BT, and BN is typically +/- 0.02 nT; the uncertainty in magnitude F1 is typically +/- 0.03 nT. F1, BR, BT, and BN can differ from one another and they may vary with time, but there is no practical way to determine these uncertainties more precisely at present. References: D.B. Berdichevsky, Voyager Mission, Detailed processing of weak magnetic fields; I - Constraints to the uncertainties of the calibrated magnetic field signal in the Voyager missions, 2009; https://vgrmag.gsfc.nasa.gov/Berdichevsky-VOY_sensor_opu090518.pdf Behannon, K.W., M.H. Acuna, L.F. Burlaga, R.P. Lepping, N.F. Ness, and F.M. Neubauer, Magnetic-Field Experiment for Voyager-1 and Voyager-2, Space Science Reviews, 21 (3), 235-257, 1977. Burlaga, L.F., Merged interaction regions and large-scale magnetic field fluctuations during 1991 - Voyager-2 observations, J. Geophys. Res., 99 (A10), 19341-19350, 1994. Burlaga, L.F., N.F. Ness, Y.-M. Wang, and N.R. Sheeley Jr., Heliospheric magnetic field strength and polarity from 1 to 81 AU during the ascending phase of solar cycle 23, J. Geophys. Res., 107 (A11), 1410, 2002. Ness, N., K.W. Behannon, R. Lepping, and K.H. Schatten, J. Geophys. Res., Spacecraft studies of the interplanetary magnetic field, 76, 3564, 1971.
Acknowledgement
L.F. Burlaga, Please acknowledge the Principal Investigator, N.F. Ness of the Bartol Research Institute, University of Delaware, and the NASA National Space Science Data Center (NSSDC) for usage of data from this site in publications and presentations.
PublicationInfo
Authors
Burlaga, Leonard, F.
PublicationDate
2023-01-01 00:00:00Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Leonard.F.Burlaga
2.
MetadataContact
spase://SMWG/Person/Robert.E.McGuire
3.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
COHOWeb Service
URL
https://cohoweb.gsfc.nasa.gov
Description
Voyager 2 merged Magnetic Field and Ephemeris Data from COHOWeb
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/Voyager2_MAG_VIM_CDF_PT48S
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VSPO/NumericalData/Voyager2/MAG/VIM/CDF/PT48S
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/voyager/voyager2/magnetic_fields_cdaweb/vim_48secmag/
Description
In CDF via ftp from SPDF.
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/voyager/voyager2/magnetic_fields_cdaweb/vim_48secmag/
Description
In CDF via http from SPDF.
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=VOYAGER2_48S_MAG-VIM&index=sp_phys
ProductKey
VOYAGER2_48S_MAG-VIM
Description
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/voyager/voyager2/magnetic_fields_cdaweb/vim_48secmag
AccessFilenameTemplate
voyager2_48s_mag-vim_$Y$m$d_$v.cdf
Acknowledgement
L.F. Burlaga, Please acknowledge the Principal Investigator, N.F. Ness of the Bartol Research Institute, University of Delaware, and the NASA National Space Science Data Center (NSSDC) for usage of data from this site in publications and presentations. 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/VOYAGER2_48S_MAG-VIM/clientLibraryExample/
Style
WebService
ProductKey
VOYAGER2_48S_MAG-VIM
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
L.F. Burlaga, Please acknowledge the Principal Investigator, N.F. Ness of the Bartol Research Institute, University of Delaware, and the NASA National Space Science Data Center (NSSDC) for usage of data from this site in publications and presentations. 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
VOYAGER2_48S_MAG-VIM@0
ProductKey
VOYAGER2_48S_MAG-VIM@1
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
L.F. Burlaga, Please acknowledge the Principal Investigator, N.F. Ness of the Bartol Research Institute, University of Delaware, and the NASA National Space Science Data Center (NSSDC) for usage of data from this site in publications and presentations. Please acknowledge the data providers and CDAWeb when using these data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/Voyager2/MAG
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
2009-01-31 11:01:29.567Z
StopDate
2014-12-30 21:11:57.120Z
Cadence
PT48S
ObservedRegion
Heliosphere.Outer
ObservedRegion
Heliosphere.Heliosheath
Parameter #1
Name
Time
ParameterKey
Epoch
Description
Time, Beginning of the Interval
Caveats
This parameter exhibits an increasing monotonic progression.
Cadence
PT48S
Units
ms
UnitsConversion
1e-3>s
RenderingHints
AxisLabel
Epoch
ValueFormat
e14.8
ScaleMin
6.2987652219904e+13
ScaleMax
6.3745034619904e+13
ScaleType
LinearScale
ValidMin
01-Jan-1996 00:00:00.000
ValidMax
01-Jan-2020 00:00:00.000
FillValue
31-Dec-9999 23:59:59.999
Support
SupportQuantity
Temporal
Parameter #2
Name
Time, Ephemeris
ParameterKey
Epoch_ephem
Description
Time, Beginning of the Interval, Ephemeris
Caveats
This parameter exhibits an increasing monotonic progression.
Cadence
PT48S
Units
ms
UnitsConversion
1e-3>s
RenderingHints
AxisLabel
Epoch_ephem
ValueFormat
e14.8
ScaleMin
6.2987652219904e+13
ScaleMax
6.3745034619904e+13
ScaleType
LinearScale
ValidMin
01-Jan-1996 00:00:00.000
ValidMax
01-Jan-2020 00:00:00.000
FillValue
31-Dec-9999 23:59:59.999
Support
SupportQuantity
Temporal
Parameter #3
Name
Spacecraft ID
Set
Time series defined by using: EPOCH
ParameterKey
spacecraftID
Description
Spacecraft ID, 1-voyager1, 2-voyager2
Cadence
PT48S
RenderingHints
AxisLabel
s/c_ID
ValueFormat
i1
ValidMin
1
ValidMax
2
FillValue
9
Support
SupportQuantity
Other
Parameter #4
Name
B Field Magnitude
Set
Time series defined by using: EPOCH
ParameterKey
F1
Description
Magnetic Field Magnitude, B, Average of Fine Scale Magnitudes
Cadence
PT48S
Units
nT
UnitsConversion
1e-9>T
RenderingHints
DisplayType
TimeSeries
AxisLabel
Voyager2_BField
ValueFormat
f10.5
ValidMin
-10.0
ValidMax
10.0
FillValue
-1.0e+31
Field
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #5
Name
BR in RTN Coordinates
Set
Time series defined by using: EPOCH
ParameterKey
BR
Description
Magnetic Field Radial Component, BR, in Radial-Tangential-Normal, RTN, Coordinates
Cadence
PT48S
Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
RenderingHints
DisplayType
TimeSeries
AxisLabel
Voyager2_BR
ValueFormat
f10.5
ValidMin
-10.0
ValidMax
10.0
FillValue
-1.0e+31
Field
Qualifier
Component.I
FieldQuantity
Magnetic
Parameter #6
Name
BT in RTN Coordinates
Set
Time series defined by using: EPOCH
ParameterKey
BT
Description
Magnetic Field Tangential Component, BT, in Radial-Tangential-Normal, RTN, Coordinates
Cadence
PT48S
Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
RenderingHints
DisplayType
TimeSeries
AxisLabel
Voyager2_BT
ValueFormat
f10.5
ValidMin
-10.0
ValidMax
10.0
FillValue
-1.0e+31
Field
Qualifier
Component.J
FieldQuantity
Magnetic
Parameter #7
Name
BN in RTN Coordinates
Set
Time series defined by using: EPOCH
ParameterKey
BN
Description
Magnetic Field Normal Component, BN, in Radial-Tangential-Normal, RTN, Coordinates
Cadence
PT48S
Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
RenderingHints
DisplayType
TimeSeries
AxisLabel
Voyager2_BN
ValueFormat
f10.5
ValidMin
-10.0
ValidMax
10.0
FillValue
-1.0e+31
Field
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #8
Name
Uncertainty in B
Set
Time series defined by using: EPOCH
ParameterKey
dF
Description
Magnetic Field Magnitude, B, Uncertainty
Cadence
PT48S
Units
nT
UnitsConversion
1e-9>T
RenderingHints
DisplayType
TimeSeries
AxisLabel
Voyager2_dF1
ValueFormat
f6.2
ValidMin
-10.0
ValidMax
10.0
FillValue
-1.0e+31
Field
Qualifier
Uncertainty
FieldQuantity
Magnetic
Parameter #9
Name
Uncertainty in BR
Set
Time series defined by using: EPOCH
ParameterKey
dBR
Description
Magnetic Field Radial Component, BR, Uncertainty in Radial-Tangential-Normal, RTN, Coordinates
Cadence
PT48S
Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
RenderingHints
DisplayType
TimeSeries
AxisLabel
Voyager2_dBR
ValueFormat
f6.2
ValidMin
-10.0
ValidMax
10.0
FillValue
-1.0e+31
Field
Qualifier
Component.I
FieldQuantity
Magnetic
Parameter #10
Name
Uncertainty in BT
Set
Time series defined by using: EPOCH
ParameterKey
dBT
Description
Magnetic Field Tangential Component, BT, Uncertainty in Radial-Tangential-Normal, RTN, Coordinates
Cadence
PT48S
Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
RenderingHints
DisplayType
TimeSeries
AxisLabel
Voyager2_dBT
ValueFormat
f6.2
ValidMin
-10.0
ValidMax
10.0
FillValue
-1.0e+31
Field
Qualifier
Component.J
FieldQuantity
Magnetic
Parameter #11
Name
Uncertainty in BN
Set
Time series defined by using: EPOCH
ParameterKey
dBN
Description
Magnetic Field Normal Component, BN, Uncertainty in Radial-Tangential-Normal, RTN, Coordinates
Cadence
PT48S
Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
RenderingHints
DisplayType
TimeSeries
AxisLabel
Voyager2_dBN
ValueFormat
f6.2
ValidMin
-10.0
ValidMax
10.0
FillValue
-1.0e+31
Field
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #12
Name
Spacecraft Heliographic Radius
Set
Time series defined by using: EPOCH_EPHEM
ParameterKey
Radius
Description
Spacecraft Heliographic Radius
Cadence
PT48S
Units
ua
UnitsConversion
1.495978706961e11>m
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HGI
RenderingHints
DisplayType
TimeSeries
AxisLabel
Radius
ValueFormat
f6.2
ValidMin
0.0
ValidMax
250.0
FillValue
-1.0e+31
Support
Qualifier
Magnitude
SupportQuantity
Positional
Parameter #13
Name
Spacecraft Heliographic Latitude
Set
Time series defined by using: EPOCH_EPHEM
ParameterKey
hg_lat
Description
Spacecraft Heliographic Latitude
Cadence
PT48S
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HGI
RenderingHints
DisplayType
TimeSeries
AxisLabel
hg_lat
ValueFormat
f6.1
ValidMin
-180.0
ValidMax
180.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #14
Name
Spacecraft Heliographic Longitude
Set
Time series defined by using: EPOCH_EPHEM
ParameterKey
hg_lon
Description
Spacecraft Heliographic Longitude
Cadence
PT48S
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HGI
RenderingHints
DisplayType
TimeSeries
AxisLabel
hg_lon
ValueFormat
f6.1
ValidMin
0.0
ValidMax
360.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #15
Name
Spacecraft Heliographic Inertial Longitude
Set
Time series defined by using: EPOCH_EPHEM
ParameterKey
hgi_lon
Description
Spacecraft Heliographic Inertial Longitude
Cadence
PT48S
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HGI
RenderingHints
DisplayType
TimeSeries
AxisLabel
hgi_lon
ValueFormat
f6.1
ValidMin
0.0
ValidMax
360.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional