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Data Access

Polar Electric Fields Instrument (EFI), Spacecraft Position in GSM Coordinates

Mozer, Forrest S. (2025). Polar Electric Fields Instrument (EFI), Spacecraft Position in GSM Coordinates [Data set]. University of California, Berkeley. https://doi.org/10.48322/rk6r-qz49 .

Note: Proper references, including those in BibTex or other formats , should include the "Accessed on date" as shown above to identify the version of the resource being cited in a given publication.

ResourceID
spase://NASA/NumericalData/POLAR/EFI/SC/GSM/Position/PT60S

Description

The Polar spacecraft position, in GSM coordinates.

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Details

Version:2.7.1

MetadataRightsList

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 SPASE metadata descriptions

Version:2.7.1

NumericalData

ResourceID
spase://NASA/NumericalData/POLAR/EFI/SC/GSM/Position/PT60S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
Polar Electric Fields Instrument (EFI), Spacecraft Position in GSM Coordinates
DOI
https://doi.org/10.48322/rk6r-qz49
ReleaseDate
2026-07-21 12:06:35Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 21:15:01Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-08-05 13:12:20Z
Note
Added ObservedRegion(s). 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 value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-11-14 16:03:07Z
Note
Added PublicationInfo. Added ResourceType and NamingAuthority. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:31:00Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-02-12 23:59:28Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:26:30Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:06:35Z
Note
Added HelioData InformationURL. JWL
Description

The Polar spacecraft position, in GSM coordinates.

Acknowledgement
The user will acknowledge, in any publication which uses POLAR EFI data, the instrument PI.
PublicationInfo
Authors
Mozer, Forrest S.
PublicationDate
2025-11-14 16:03:07Z
PublishedBy
University of California, Berkeley
Contacts
Role Person StartDate StopDate Note
1. PrincipalInvestigator spase://SMWG/Person/Forrest.S.Mozer
2. MetadataContact spase://SMWG/Person/Jack.B.Vernetti
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/POLAR_EFI_SC_GSM_Position_PT60S
Description

The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.

PriorIDs
spase://VWO/NumericalData/POLAR/EFI/S_C_GSM_Position
spase://VSPO/NumericalData/POLAR/EFI/SC/GSM/Position/PT60S
AccessInformation
RepositoryID
spase://SMWG/Repository/UCB/POLAR/EFI
Availability
Online
AccessRights
Open
AccessURL
URL
http://polarefi.ssl.berkeley.edu/PolarEFI
Description

This URL is the root location of the POLAR EFI archive. It consists of Yearly subdirectories: 1996, 1997, ..., 2008 each of which consists of Monthly subdirectories: 01, 02, ..., 12 The archive files for a given date are located in the corresponding YY/MM subdirectory.

Language
en
Format
CDF
Encoding
None
Acknowledgement
The user will acknowledge, in any publication which uses POLAR EFI data, the instrument PI.
InstrumentIDs
spase://SMWG/Instrument/POLAR/EFI
MeasurementType
Ephemeris
TemporalDescription
TimeSpan
StartDate
1996-03-16 00:00:00Z
StopDate
2008-04-13 24:00:00Z
Cadence
PT60S
ObservedRegion
Earth.Magnetosphere.Polar
ObservedRegion
Earth.NearSurface.AuroralRegion
ObservedRegion
Earth.Magnetosphere
Parameter #1
Name
Time
ParameterKey
TIME_TAG
Description

Data point time-tags which are double precision floating point numbers which represent the number of seconds, UTC, from midnight of the day represented by the file.

Cadence
PT60S
Units
seconds
ValidMin
0.0
ValidMax
86460.0
Support
SupportQuantity
Temporal
Parameter #2
Name
SCPositionGSMVector
ParameterKey
DATA_VALUES
Description

Data point vector values which are a triplet of single precision floating point numbers which represent the X,Y,Z components of the GSM spacecraft position, in Re.

Cadence
PT60S
Units
Re
UnitsConversion
6.3712e+6>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
ValidMin
-20.0
ValidMax
20.0
Support
SupportQuantity
Positional