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Data Access
PDS/PPI
Voyager 2 Neptune Magnetic Field in Heliographic RTN Coordinates, Resampled, Version 1.0, 48 s Summary Data
var authors='Decker, Robert B.; Krimigis, Stamatios M.';
document.write(authors);
(2026).
Voyager 2 Neptune Magnetic Field in Heliographic RTN Coordinates, Resampled, Version 1.0, 48 s Summary Data.
[Data set].
Space Physics Data Facility; Planetary Data System.
https://doi.org/10.48322/vncq-0s27. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/Voyager2/MAG/Neptune/PT48S
Description
* Data Set Overview
* =================
This Data Set includes Data from the Low Field Magnetometer (LFM) during the inbound Neptune Encounter Beginning in the Solar Wind and continuing until the first Magnetopause Crossing. The Magnetometer are given in Heliographic Coordinates and the Data have been averaged from the resampled 9.6 s Sample Rate to a 48.0 s Rate.
The Data Set consists of the following Columns:
* 1) ctime - Decimal Seconds since 1966-01-01T00:00:00.000
* 2) pdstime - ISO Standard Time Format
* 3) Spacecraft Clock Value - m65536
* 4) Spacecraft Clock Value - mod60
* 5) Spacecraft Clock Value - fds_line
* 6) mag_id - Magnetometer ID: 1=LFM, 2=HFM
* 7) Br - Radial Component
* 8) Bt - Tangential Component
* 9) Bn - Normal Component
* 10) Bmag - Magnitude of the averaged Magnetic Field Components
* 11) avg_Bmag - Average of the Magnitude of the raw Components
* 12) lambda - Magnetic Longitude, lambda=atan(Bt/Br)
* 13) delta - Magnetic Latitude, delta=asin(Bn/avg_Bmag)
* 14) rms_br - Br Pythagorean RMS Deviation of the Component Average
* 15) rms_bt - Bt Pythagorean RMS Deviation of the Component Average
* 16) rms_bn - Bn Pythagorean RMS Deviation of the Component Average
* 17) npts - Number of Points in the Average
* 18) Data Flag - A Character String which indicates Software or Spacecraft Hardware Intervention which reduces Confidence in the Data, Null Flags represent "good" Data
* Parameters
* ==========
* Derived Parameters
* ==================
+-------------------------------------------------------------+
| Parameter Chracteristics | Value |
---------------------------------------------------------------
| Sampling Parameter Name | TIME |
| Sampling Parameter Resolution | 0.06 SECONDS |
| Minimum Sampling Parameter | 0.06 SECONDS |
| Maximum Sampling Parameter | 0.06 SECONDS |
| Sampling Parameter Interval | 1.92 SECONDS |
| Minimum Available Sampling Interval | 1.92 SECONDS |
| Data Set Parameter Name | MAGNETIC FIELD VECTOR |
| Noise Level | 0.006 NT |
| Data Set Parameter Unit | NT |
+-------------------------------------------------------------+
Magnetic Field Vector: A derived Parameter which combines the three orthogonal Magnetic Field Component Measurements.
* Measured Parameters
* ===================
Magnetic Field Component: A measured Parameter equaling the Magnetic Field Strength along a particular Axis Direction. Usually the three orthogonal Axis Components are measured by three different Sensors.
* Ancillary Data
* ==============
An ancillary Data File containing the derived Spacecraft Magnetic Field is provided with these Data at a 48 s Sample Rate. These Data provide Zero Level Offsets used in the Data Processing. Spacecraft Field Data is provided in Spacecraft Coordinates.
* Coordinate System
* =================
* Mean Inertial Heliographic 1950 (HG) Coordinates
* ================================================
+----------------------------------------------------------+
| Coordinate System Characteristics | Value |
------------------------------------------------------------
| Coordinate System Center NAME | SUN |
| Coordinate System Reference Epoch | UNK /* 09-23-1950 */ |
+----------------------------------------------------------+
The Heliographic Coordinate System is defined in the Reference Epoch of 1950. The Unit Vectors which define the Coordinate System are as follows:
* X - Points away from the Sun toward the Ascending Node, in the Solar Equatorial Plane
* Z - Points along the Spin Axis of the Sun, positive above the Equatorial Plane
* Y - Completes the right-handed Set
Position is given in Terms of the following:
* Range (R) - The Range or R Component of the Spherical Heliographic Coordinate System is the Distance from the Position of the Sun at the Reference Epoch to the Spacecraft measured in AU.
* Latitude (LAT) - The Latitude or LAT Component of the Spherical Heliographic Coordinate System is the Angle between the Solar Equatorial Plane of the Reference Epoch measured in the Plane that contains the Solar Spin Axis of that Epoch.
* Longitude (LONG) - The Longitude or LONG Component of the Spherical Heliographic Coordinate System is Zero in the Direction of the Ascending Node at the Reference Epoch (X Direction) and increases for a Body orbiting the Sun as the Earth does.
* X - The X Component of the Heliographic Coordinate System points away from the Sun, towards the Ascending Node, and lies in the Solar Equatorial Plane.
* Y - The Y Component of the Heliographic Coordinate System is formed by the right-handed Cross Product of the X and Z Unit Vectors. It lies in the Solar Equatorial Plane and it points away from the Sun, but does not extend in the Direction of any particular Body.
* Z - The Z Component of the Heliographic Coordinate
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/Neptune/PT48S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Voyager 2 Neptune Magnetic Field in Heliographic RTN Coordinates, Resampled, Version 1.0, 48 s Summary Data
DOI
https://doi.org/10.48322/vncq-0s27
ReleaseDate
2026-07-21 12:09:00Z
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 09:59:24Z
Note
Added new Contact(s). ZCB
RevisionEvent
ReleaseDate
2026-04-10 10:04:14Z
Note
Added PublicationInfo. ZCB
RevisionEvent
ReleaseDate
2026-06-12 18:47:03Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:31:25Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:09:00Z
Note
Added HelioData InformationURL. JWL
Description
* Data Set Overview
* =================
This Data Set includes Data from the Low Field Magnetometer (LFM) during the inbound Neptune Encounter Beginning in the Solar Wind and continuing until the first Magnetopause Crossing. The Magnetometer are given in Heliographic Coordinates and the Data have been averaged from the resampled 9.6 s Sample Rate to a 48.0 s Rate.
The Data Set consists of the following Columns:
* 1) ctime - Decimal Seconds since 1966-01-01T00:00:00.000
* 2) pdstime - ISO Standard Time Format
* 3) Spacecraft Clock Value - m65536
* 4) Spacecraft Clock Value - mod60
* 5) Spacecraft Clock Value - fds_line
* 6) mag_id - Magnetometer ID: 1=LFM, 2=HFM
* 7) Br - Radial Component
* 8) Bt - Tangential Component
* 9) Bn - Normal Component
* 10) Bmag - Magnitude of the averaged Magnetic Field Components
* 11) avg_Bmag - Average of the Magnitude of the raw Components
* 12) lambda - Magnetic Longitude, lambda=atan(Bt/Br)
* 13) delta - Magnetic Latitude, delta=asin(Bn/avg_Bmag)
* 14) rms_br - Br Pythagorean RMS Deviation of the Component Average
* 15) rms_bt - Bt Pythagorean RMS Deviation of the Component Average
* 16) rms_bn - Bn Pythagorean RMS Deviation of the Component Average
* 17) npts - Number of Points in the Average
* 18) Data Flag - A Character String which indicates Software or Spacecraft Hardware Intervention which reduces Confidence in the Data, Null Flags represent "good" Data
* Parameters
* ==========
* Derived Parameters
* ==================
+-------------------------------------------------------------+
| Parameter Chracteristics | Value |
---------------------------------------------------------------
| Sampling Parameter Name | TIME |
| Sampling Parameter Resolution | 0.06 SECONDS |
| Minimum Sampling Parameter | 0.06 SECONDS |
| Maximum Sampling Parameter | 0.06 SECONDS |
| Sampling Parameter Interval | 1.92 SECONDS |
| Minimum Available Sampling Interval | 1.92 SECONDS |
| Data Set Parameter Name | MAGNETIC FIELD VECTOR |
| Noise Level | 0.006 NT |
| Data Set Parameter Unit | NT |
+-------------------------------------------------------------+
Magnetic Field Vector: A derived Parameter which combines the three orthogonal Magnetic Field Component Measurements.
* Measured Parameters
* ===================
Magnetic Field Component: A measured Parameter equaling the Magnetic Field Strength along a particular Axis Direction. Usually the three orthogonal Axis Components are measured by three different Sensors.
* Ancillary Data
* ==============
An ancillary Data File containing the derived Spacecraft Magnetic Field is provided with these Data at a 48 s Sample Rate. These Data provide Zero Level Offsets used in the Data Processing. Spacecraft Field Data is provided in Spacecraft Coordinates.
* Coordinate System
* =================
* Mean Inertial Heliographic 1950 (HG) Coordinates
* ================================================
+----------------------------------------------------------+
| Coordinate System Characteristics | Value |
------------------------------------------------------------
| Coordinate System Center NAME | SUN |
| Coordinate System Reference Epoch | UNK /* 09-23-1950 */ |
+----------------------------------------------------------+
The Heliographic Coordinate System is defined in the Reference Epoch of 1950. The Unit Vectors which define the Coordinate System are as follows:
* X - Points away from the Sun toward the Ascending Node, in the Solar Equatorial Plane
* Z - Points along the Spin Axis of the Sun, positive above the Equatorial Plane
* Y - Completes the right-handed Set
Position is given in Terms of the following:
* Range (R) - The Range or R Component of the Spherical Heliographic Coordinate System is the Distance from the Position of the Sun at the Reference Epoch to the Spacecraft measured in AU.
* Latitude (LAT) - The Latitude or LAT Component of the Spherical Heliographic Coordinate System is the Angle between the Solar Equatorial Plane of the Reference Epoch measured in the Plane that contains the Solar Spin Axis of that Epoch.
* Longitude (LONG) - The Longitude or LONG Component of the Spherical Heliographic Coordinate System is Zero in the Direction of the Ascending Node at the Reference Epoch (X Direction) and increases for a Body orbiting the Sun as the Earth does.
* X - The X Component of the Heliographic Coordinate System points away from the Sun, towards the Ascending Node, and lies in the Solar Equatorial Plane.
* Y - The Y Component of the Heliographic Coordinate System is formed by the right-handed Cross Product of the X and Z Unit Vectors. It lies in the Solar Equatorial Plane and it points away from the Sun, but does not extend in the Direction of any particular Body.
* Z - The Z Component of the Heliographic Coordinate
PublicationInfo
Authors
Decker, Robert B.; Krimigis, Stamatios M.
PublicationDate
2026-04-10 10:04:14Z
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-N-MAG-4-SUMM-HGCOORDS-48SEC-V1.0
URL
https://pds-ppi.igpp.ucla.edu/data/VG2-N-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_Neptune_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/Neptune/PT48S
spase://VSPO/NumericalData/Voyager2/MAG/Neptune/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-N-MAG-4-SUMM-HGCOORDS-48SEC-V1.0
ProductKey
VG2-N-MAG-4-SUMM-HGCOORDS-48SEC-V1.0
Description
This Collection is archived with 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
1989-08-22 00:00:47.00Z
StopDate
1989-08-29 23:59:58.00Z
Cadence
PT48S
ObservedRegion
Neptune