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Data Access
PDS/PPI
Voyager 2 Heliosphere Magnetic Field in Heliographic and Inertial Heliographic Coordinates, 48 s Data
var authors='Decker, Robert B.; Krimigis, Stamatios M.';
document.write(authors);
(2026).
Voyager 2 Heliosphere Magnetic Field in Heliographic and Inertial Heliographic Coordinates, 48 s Data.
[Data set].
Space Physics Data Facility; Planetary Data System.
https://doi.org/10.48322/nd0j-2s08. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/Voyager2/MAG/Heliosphere/PT48S
Description
* Data Set Overview
* =================
This Data Set contains Voyager 1 Magnetometer Data from the Interplanetary Cruise averaged to 48 s Samples in Heliographic Coordinates.
* Data Processing
* ===============
The high resolution Data submitted to the NSSDC has its origins in the original MVS 'Summary' Data Sets formally produced on the NSSC IBM MVS Mainframe System. The original Data Sets contain a Mix of Engineering, Electron, Magnetic Field and Plasma Data. The Voyager Magnetometer (MAG) Experiment now resides on a dedicated Workstation where only MAG Data are processed.
All Voyager MAG data submitted to the NSSDC consists wholly of high resolution LFM Averages. These Files consist of a Set of Averages applied across all of the differing Telemetry Modes of the Mission. In the Case of the Magnetometer Experiment, the Records contain both 1.92 s, 9.6 s and 48 s Averages. 1.92 s Averages are created from the detail Detail Data, 9.6 s Averages are created from 1.92 s Averages and 48 s Averages are created from the 9.6 s Averages.
All Data in this NSSDC Data Set are Interplanetary and in Heliographic Coordinates (see below). An ASCII formated Data Set containing Key Components of the 48 s Magnetic Field Data and Ephemeris Data has been created allowing more convenient access to high resolution Voyager Magnetometer Data.
* Coordinate System
* =================
Interplanetary Magnetic Field studies make use of two important Coordinate Systems, the Inertial Heliographic (IHG) Coordinate System and the Heliographic (HG) Coordinate System.
The IHG Coordinate System is used to define the Position of the Spacecraft. The IHG System is defined with its Origin at the Sun. There are three Orthogonal Axes, X(IHG), Y(IHG), and Z(IHG). The Z(IHG) Axis points northward along the Spin Axis of the Sun. The XY Plane of the IHG System lays in the Solar Equatorial Plane. The Intersection of the Solar Equatorial Plane with the Ecliptic Plane defines a Line, the Longitude of the Ascending Node, which is taken to be the X(IHG) Axis. The X(IHG) Axis drifts slowly with Time, approximately one degree per 72 years.
The Magnetic Field Orientation is defined in relation to the Spacecraft. Drawing a Line from the Center of the Sun, which is the Origin of the IHG System, to the Spacecraft defines the X Axis of the HG Coordinate System. The HG Coordinate System is defined with its Origin centered at the Spacecraft. Three orthogonal Axes are defined, X(HG), Y(HG), and Z(HG). The X(HG) Axis points radially away from the Sun and the Y(HG) Axis is parallel to the Solar Equatorial Plane and therefore parallel to the X(IHG)-Y(IHG) Plane as well. The Z(HG) Axis is chosen to complete the Orthonormal Triad.
An excellent Reference Guide with Diagrams explaining the IHG and HG Systems may be found in Space and Science Reviews, Volume 39 (1984), 255-316, MHD Processes in the Outer Heliosphere, L. F. Burlaga.
* Data Format
* ===========
+---------------------------------------------------------------------+
| Num | Field | Description for Data before 1990 |
-----------------------------------------------------------------------
| 1 | Spacecraft ID | FLT1=Voyager 1, FLT2=Voyager 2 |
| 2 | Coordinate System | Heliographic, HG |
| 3 | Time (UTC) | Format: YY DDD HH MM SS MSS |
| 4 | Field Magnitude | in nT |
| 5 | Field Component 1 | in nT, HG Coordinates |
| 6 | Field Component 2 | in nT, HG Coordinates |
| 7 | Field Component 3 | in nT, HG Coordinates |
| 8 | Spacecraft Radial Distance | in AU |
| 9 | Spacecraft X Position | in AU, IHG Coordinates |
| 10 | Spacecraft Y Position | in AU, IHG Coordinates |
| 11 | Spacecraft Z Position | in AU, IHG Coordinates |
+---------------------------------------------------------------------+
Time Format Definitions: YY=Year, DDD=Day of Year, HH=Hour, MM=Minute, SS=Second, MSS=Millisecond
+-------------------------------------------------------------------------------------------------+
| Num | Field | Description for Termination Shock Data |
---------------------------------------------------------------------------------------------------
| 1 | Spacecraft ID | 1=Voyager 1, 2=Voyager 2 |
| 2 | Time (UTC) | Format: YYYY DDD.DDDD, YY=Year, DDD.DDDD=Decimal Day of Year |
| 3 | F1 Average Field Magnitude | in nT |
| 4 | Br Field Component | in nT, HG Coordinates |
| 5 | Bt Field Component | in nT, HG Coordinates |
| 6 | Bn Field Component | in nT, HG Coordinates |
| 7 | F1 1-σ Error | in nT |
| 8 | Br 1-σ Error | in nT, HG Coordinates |
| 9 | Bt 1-σ Error | in nT, HG Coordinates |
| 10 | Bn 1-σ Error | in nT, HG Coordinates |
+-------------------------------------------------------------------------------------------------+
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/Voyager2/MAG/Heliosphere/PT48S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Voyager 2 Heliosphere Magnetic Field in Heliographic and Inertial Heliographic Coordinates, 48 s Data
DOI
https://doi.org/10.48322/nd0j-2s08
ReleaseDate
2026-07-21 12:08:59Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:15:59Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:32:38Z
Note
Added MetadataRightsList. Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB
RevisionEvent
ReleaseDate
2026-04-10 09:59:23Z
Note
Added new Contact(s). ZCB
RevisionEvent
ReleaseDate
2026-04-10 10:04:13Z
Note
Added PublicationInfo. ZCB
RevisionEvent
ReleaseDate
2026-06-12 19:17:25Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:31:24Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:08:59Z
Note
Added HelioData InformationURL. JWL
Description
* Data Set Overview
* =================
This Data Set contains Voyager 1 Magnetometer Data from the Interplanetary Cruise averaged to 48 s Samples in Heliographic Coordinates.
* Data Processing
* ===============
The high resolution Data submitted to the NSSDC has its origins in the original MVS 'Summary' Data Sets formally produced on the NSSC IBM MVS Mainframe System. The original Data Sets contain a Mix of Engineering, Electron, Magnetic Field and Plasma Data. The Voyager Magnetometer (MAG) Experiment now resides on a dedicated Workstation where only MAG Data are processed.
All Voyager MAG data submitted to the NSSDC consists wholly of high resolution LFM Averages. These Files consist of a Set of Averages applied across all of the differing Telemetry Modes of the Mission. In the Case of the Magnetometer Experiment, the Records contain both 1.92 s, 9.6 s and 48 s Averages. 1.92 s Averages are created from the detail Detail Data, 9.6 s Averages are created from 1.92 s Averages and 48 s Averages are created from the 9.6 s Averages.
All Data in this NSSDC Data Set are Interplanetary and in Heliographic Coordinates (see below). An ASCII formated Data Set containing Key Components of the 48 s Magnetic Field Data and Ephemeris Data has been created allowing more convenient access to high resolution Voyager Magnetometer Data.
* Coordinate System
* =================
Interplanetary Magnetic Field studies make use of two important Coordinate Systems, the Inertial Heliographic (IHG) Coordinate System and the Heliographic (HG) Coordinate System.
The IHG Coordinate System is used to define the Position of the Spacecraft. The IHG System is defined with its Origin at the Sun. There are three Orthogonal Axes, X(IHG), Y(IHG), and Z(IHG). The Z(IHG) Axis points northward along the Spin Axis of the Sun. The XY Plane of the IHG System lays in the Solar Equatorial Plane. The Intersection of the Solar Equatorial Plane with the Ecliptic Plane defines a Line, the Longitude of the Ascending Node, which is taken to be the X(IHG) Axis. The X(IHG) Axis drifts slowly with Time, approximately one degree per 72 years.
The Magnetic Field Orientation is defined in relation to the Spacecraft. Drawing a Line from the Center of the Sun, which is the Origin of the IHG System, to the Spacecraft defines the X Axis of the HG Coordinate System. The HG Coordinate System is defined with its Origin centered at the Spacecraft. Three orthogonal Axes are defined, X(HG), Y(HG), and Z(HG). The X(HG) Axis points radially away from the Sun and the Y(HG) Axis is parallel to the Solar Equatorial Plane and therefore parallel to the X(IHG)-Y(IHG) Plane as well. The Z(HG) Axis is chosen to complete the Orthonormal Triad.
An excellent Reference Guide with Diagrams explaining the IHG and HG Systems may be found in Space and Science Reviews, Volume 39 (1984), 255-316, MHD Processes in the Outer Heliosphere, L. F. Burlaga.
* Data Format
* ===========
+---------------------------------------------------------------------+
| Num | Field | Description for Data before 1990 |
-----------------------------------------------------------------------
| 1 | Spacecraft ID | FLT1=Voyager 1, FLT2=Voyager 2 |
| 2 | Coordinate System | Heliographic, HG |
| 3 | Time (UTC) | Format: YY DDD HH MM SS MSS |
| 4 | Field Magnitude | in nT |
| 5 | Field Component 1 | in nT, HG Coordinates |
| 6 | Field Component 2 | in nT, HG Coordinates |
| 7 | Field Component 3 | in nT, HG Coordinates |
| 8 | Spacecraft Radial Distance | in AU |
| 9 | Spacecraft X Position | in AU, IHG Coordinates |
| 10 | Spacecraft Y Position | in AU, IHG Coordinates |
| 11 | Spacecraft Z Position | in AU, IHG Coordinates |
+---------------------------------------------------------------------+
Time Format Definitions: YY=Year, DDD=Day of Year, HH=Hour, MM=Minute, SS=Second, MSS=Millisecond
+-------------------------------------------------------------------------------------------------+
| Num | Field | Description for Termination Shock Data |
---------------------------------------------------------------------------------------------------
| 1 | Spacecraft ID | 1=Voyager 1, 2=Voyager 2 |
| 2 | Time (UTC) | Format: YYYY DDD.DDDD, YY=Year, DDD.DDDD=Decimal Day of Year |
| 3 | F1 Average Field Magnitude | in nT |
| 4 | Br Field Component | in nT, HG Coordinates |
| 5 | Bt Field Component | in nT, HG Coordinates |
| 6 | Bn Field Component | in nT, HG Coordinates |
| 7 | F1 1-σ Error | in nT |
| 8 | Br 1-σ Error | in nT, HG Coordinates |
| 9 | Bt 1-σ Error | in nT, HG Coordinates |
| 10 | Bn 1-σ Error | in nT, HG Coordinates |
+-------------------------------------------------------------------------------------------------+
PublicationInfo
Authors
Decker, Robert B.; Krimigis, Stamatios M.
PublicationDate
2026-04-10 10:04:13Z
PublishedBy
Space Physics Data Facility; Planetary Data System
Contacts
Role
Person
StartDate
StopDate
Note
1.
CoPI
spase://SMWG/Person/Robert.B.Decker
2.
PrincipalInvestigator
spase://SMWG/Person/Stamatios.M.Krimigis
3.
MetadataContact
spase://SMWG/Person/Todd.A.King
4.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
VG2-SW-MAG-4-SUMM-HGCOORDS-48SEC-V1.0
URL
https://pds-ppi.igpp.ucla.edu/data/VG2-SW-MAG-4-SUMM-HGCOORDS-48SEC-V1.0/AAREADME.TXT
Description
The Document describing the Contents of the Collection.
Language
En
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/Voyager2_MAG_Heliosphere_PT48S
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VMO/NumericalData/Voyager2/MAG/Heliosphere.Outer/PT48S
spase://VSPO/NumericalData/Voyager2/MAG/Heliosphere/PT48S
AccessInformation
RepositoryID
spase://SMWG/Repository/PDS/PPI
Availability
Online
AccessRights
Open
AccessURL
Name
PDS/PPI
URL
https://pds-ppi.igpp.ucla.edu/search/view/?f=yes&id=pds://PPI/VG2-SW-MAG-4-SUMM-HGCOORDS-48SEC-V1.0
ProductKey
VG2-SW-MAG-4-SUMM-HGCOORDS-48SEC-V1.0
Description
This Collection is archived with the NASA Planetary Data System.
Language
En
Format
Text.ASCII
Acknowledgement
NASA Planetary Plasma Interactions (PPI) Node of the Planetary Data System (PDS) and the Principal Investigator for the Data.
InstrumentIDs
spase://SMWG/Instrument/Voyager2/MAG
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
1977-08-20 15:19:47.00Z
StopDate
1989-12-31 22:08:33.00Z
Cadence
PT48S
ObservedRegion
Heliosphere.Outer