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Data Access
PDS/PPI
Voyager 2 Neptune Ephemeris in Neptune West Longitude, NLS, Coordinates, Version 1.0, 12 s Summary Data
var authors='Decker, Robert B.; Krimigis, Stamatios M.';
document.write(authors);
(2026).
Voyager 2 Neptune Ephemeris in Neptune West Longitude, NLS, Coordinates, Version 1.0, 12 s Summary Data.
[Data set].
Space Physics Data Facility; Planetary Data System.
https://doi.org/10.48322/tdw6-jt15. 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/Voyager2/Ephemeris/Neptune/PT12S
Description
* Data Set Overview
* =================
This Data Set consists of Voyager 2 Neptune Encounter Ephemeris Data relative to the Planet in Minus NLS Coordinates.
The NLS or Neptune West Longitude System Coordinate System is a Planetocentric System fixed to Neptune, which is rotating with a 16.11 h Period.
* Cartesian Coordinates
* =====================
* NLS Cartesian Coordinates
* =========================
- X lies in the Equatorial Plane of Neptune, positive away from the Planet, and through the Prime Meridian at the Reference Epoch
- Y completes the left-handed Set, Y = Z ⨯ X
- Z points along the Spin Axis of Neptune
The Prime Meridian of this System is defined such that at 1989-08-25T03:56:00.000 the Voyager 2 Spacecraft was at 167.7° West Longitude.
For the PDS Archive Data Set, the original Data Archive has been converted to an East Longitude (right-handed) Coordinate System Minus NLS (-NLS). This is achieved by reversing the Direction of the Y Axis, or in Spherical Coordinates, by subtracting the NLS Longitude from 360°. The Data are provided in Units of Neptunian Radii, which was taken to be equal to 24,765 km by the Voyager Project. Angles are given in Degrees. Both Cartesian and Spherical Coordinates are provided.
+-----------------------------------+
| Parameter Characteristics | Value |
-------------------------------------
| Processing Level ID | 4 |
| Software Flag | Y |
| Processing Start Time | UNK |
| Processing Stop Time | UNK |
+-----------------------------------+
* Parameters
* ==========
* Data Set Parameter POSITION VECTOR
* ==================================
A Position Vector is a Triad that describes the Location of a Point in three dimensional Space relative to some Origin.
+-----------------------------------------------------------------------+
| Parameter Characteristics | Value |
-------------------------------------------------------------------------
| Data Set Parameter Name | POSITION VECTOR |
| Data Set Parameter Unit | NEPTUNE RADII (24,765 KM) OR DEGREES |
| Sampling Parameter Name | TIME |
| Sampling Parameter Unit | SECONDS |
| Sampling Parameter Resolution | 12 |
| Sampling Parameter Interval | 12 |
| Minimum Available Sampling Int | 12 |
+-----------------------------------------------------------------------+
* Source Instrument Parameters
* ============================
N/A
* Measurement Information
* =======================
N/A
* Processing
* ==========
* Processing History
* ==================
+-------------------------------------------------------------------+
| Parameter Characteristics | Value |
---------------------------------------------------------------------
| Source Data Set ID | N/A |
| Software | UNK |
| Product Data Set ID | VG2-N-POS-5-SUMM-NLSCOORDS-12SEC-V1.0 |
+-------------------------------------------------------------------+
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.
View XML |
Edit
Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/Voyager2/Ephemeris/Neptune/PT12S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Voyager 2 Neptune Ephemeris in Neptune West Longitude, NLS, Coordinates, Version 1.0, 12 s Summary Data
DOI
https://doi.org/10.48322/tdw6-jt15
ReleaseDate
2026-07-21 12:08:52Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:15:55Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:32:33Z
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 09:59:19Z
Note
Added new Contact(s). ZCB
RevisionEvent
ReleaseDate
2026-04-10 10:04:11Z
Note
Added PublicationInfo. ZCB
RevisionEvent
ReleaseDate
2026-06-11 16:09:59Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:31:10Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:08:52Z
Note
Added HelioData InformationURL. JWL
Description
* Data Set Overview
* =================
This Data Set consists of Voyager 2 Neptune Encounter Ephemeris Data relative to the Planet in Minus NLS Coordinates.
The NLS or Neptune West Longitude System Coordinate System is a Planetocentric System fixed to Neptune, which is rotating with a 16.11 h Period.
* Cartesian Coordinates
* =====================
* NLS Cartesian Coordinates
* =========================
- X lies in the Equatorial Plane of Neptune, positive away from the Planet, and through the Prime Meridian at the Reference Epoch
- Y completes the left-handed Set, Y = Z ⨯ X
- Z points along the Spin Axis of Neptune
The Prime Meridian of this System is defined such that at 1989-08-25T03:56:00.000 the Voyager 2 Spacecraft was at 167.7° West Longitude.
For the PDS Archive Data Set, the original Data Archive has been converted to an East Longitude (right-handed) Coordinate System Minus NLS (-NLS). This is achieved by reversing the Direction of the Y Axis, or in Spherical Coordinates, by subtracting the NLS Longitude from 360°. The Data are provided in Units of Neptunian Radii, which was taken to be equal to 24,765 km by the Voyager Project. Angles are given in Degrees. Both Cartesian and Spherical Coordinates are provided.
+-----------------------------------+
| Parameter Characteristics | Value |
-------------------------------------
| Processing Level ID | 4 |
| Software Flag | Y |
| Processing Start Time | UNK |
| Processing Stop Time | UNK |
+-----------------------------------+
* Parameters
* ==========
* Data Set Parameter POSITION VECTOR
* ==================================
A Position Vector is a Triad that describes the Location of a Point in three dimensional Space relative to some Origin.
+-----------------------------------------------------------------------+
| Parameter Characteristics | Value |
-------------------------------------------------------------------------
| Data Set Parameter Name | POSITION VECTOR |
| Data Set Parameter Unit | NEPTUNE RADII (24,765 KM) OR DEGREES |
| Sampling Parameter Name | TIME |
| Sampling Parameter Unit | SECONDS |
| Sampling Parameter Resolution | 12 |
| Sampling Parameter Interval | 12 |
| Minimum Available Sampling Int | 12 |
+-----------------------------------------------------------------------+
* Source Instrument Parameters
* ============================
N/A
* Measurement Information
* =======================
N/A
* Processing
* ==========
* Processing History
* ==================
+-------------------------------------------------------------------+
| Parameter Characteristics | Value |
---------------------------------------------------------------------
| Source Data Set ID | N/A |
| Software | UNK |
| Product Data Set ID | VG2-N-POS-5-SUMM-NLSCOORDS-12SEC-V1.0 |
+-------------------------------------------------------------------+
PublicationInfo
Authors
Decker, Robert B.; Krimigis, Stamatios M.
PublicationDate
2026-04-10 10:04:11Z
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-POS-5-SUMM-NLSCOORDS-12SEC-V1.0
URL
https://pds-ppi.igpp.ucla.edu/data/VG2-N-POS-5-SUMM-NLSCOORDS-12SEC-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_Ephemeris_Neptune_PT12S
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VMO/NumericalData/Voyager2/Ephemeris/Neptune/PT12S
spase://VSPO/NumericalData/Voyager2/Ephemeris/Neptune/PT12S
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-POS-5-SUMM-NLSCOORDS-12SEC-V1.0
ProductKey
VG2-N-POS-5-SUMM-NLSCOORDS-12SEC-V1.0
Description
This Collection is archived with the NASA Planetary Data System.
Language
En
Format
Text.ASCII
Acknowledgement
Please acknowledge the NASA Planetary Plasma Interactions (PPI) Node of the Planetary Data System (PDS) and the P.I. for the Data.
InstrumentIDs
spase://SMWG/Instrument/Voyager2/Ephemeris
MeasurementType
Ephemeris
TemporalDescription
TimeSpan
StartDate
1989-08-24 18:00:00.00Z
StopDate
1989-08-26 08:19:48.00Z
Cadence
PT12S
ObservedRegion
Neptune