Data Access

ISEE 3 Isotopic Abundance Ratios

(2025). ISEE 3 Isotopic Abundance Ratios. [Data set]. Space Physics Data Facility.

ResourceID

spase://NASA/NumericalData/ISEE3/IsotAbun

Description

This data product consists of a single ASCII file containing values and their uncertainties for 32 abundance ratios of various pairs of isotopes of 13 chemical elements (C, O, Ne, Mg, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni). Between this data product and a companion catalog with isotopic fractions, isotopic composition information is given for 21 chemical elements. The ratios are based on 1978-1981 observations of ~50-500 MeV/n cosmic rays by the U. Chicago cosmic ray experiment on ISEE 3. Each of the ratios is linked in the ASCII file to the publication where its derivation is discussed.

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 may be subject to a different license.

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Details

Version:2.7.1

NumericalData

ResourceID

spase://NASA/NumericalData/ISEE3/IsotAbun

NamingAuthority

NASA

ResourceType

NumericalData

ResourceHeader

ResourceName

ISEE 3 Isotopic Abundance Ratios

ReleaseDate

2025-12-04 13:29:38Z

RevisionHistory

RevisionEvent

ReleaseDate

2025-05-15 18:39:11Z

Note

Only known prior ReleaseDate of the metadata

RevisionEvent

ReleaseDate

2025-11-14 16:02:25Z

Note

Added PublicationInfo. Added ResourceType and NamingAuthority. ZCB

RevisionEvent

ReleaseDate

2025-12-04 13:29:38Z

Note

Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB

Description

Acknowledgement

Please acknowledge the author(s) of the relevant publication(s) as mentioned above, and acknowledge Mark Wiedenbeck, the ISEE 3 instrument Principal Investigator.

PublicationInfo

Authors

Wiedenbeck, Mark E.

PublicationDate

2025-11-14 16:02:25Z

PublishedBy

Space Physics Data Facility

Contacts

	Role	Person	StartDate	StopDate	Note
1.	PrincipalInvestigator	spase://SMWG/Person/Mark.E.Wiedenbeck

InformationURL

Name

subdirectory holding ISEE 3 cosmic ray data

URL

https://spdf.gsfc.nasa.gov/pub/data/isee/isee3/energetic_particles_cr/cr_composition/

PriorIDs

spase://VEPO/NumericalData/ISEE3/IsotAbun

spase://VSPO/NumericalData/ISEE3/IsotAbun

AccessInformation

RepositoryID

spase://SMWG/Repository/NASA/GSFC/SPDF

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/isee/isee3/energetic_particles_cr/cr_composition/table3.txt

AccessURL

Name

HTTPS from SPDF

URL

https://spdf.gsfc.nasa.gov/pub/data/isee/isee3/energetic_particles_cr/cr_composition/table3.txt

Description

In CDF via HTTP from SPDF

Format

Text

DataExtent

Quantity

Units

Acknowledgement

Please acknowledge the author(s) of the relevant publication(s) as mentioned above, and acknowledge Mark Wiedenbeck, the ISEE 3 instrument Principal Investigator.

InstrumentIDs

spase://SMWG/Instrument/ISEE3/HECR

MeasurementType

EnergeticParticles

MeasurementType

IonComposition

TemporalDescription

TimeSpan

StartDate

1978-08-18 00:00:00

StopDate

1981-04-30 00:00:00

Note

This is span of data used in deriving 32-month averaged ratios

Cadence

P32M

ObservedRegion

Heliosphere.NearEarth