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Ulysses SWICS Selected Charge States and Ratios of Solar Wind Heavy Ions 3-Hour Data

ResourceID
spase://NASA/NumericalData/Ulysses/SWICS/IonsRatios/PT3H

Description

This ASCII data set consists of three hour averages of selected charge states and abundance ratios for solar wind heavy ions. The average charge state of Fe is given for states from Fe6+ to Fe16+; normal values vary from 9 to 12 in slow and fast solar wind with higher values in coronal mass ejection (CME) events. For carbon and oxygen the C6+/C5+ and O7+/O6+ ratios are given. The carbon on ratio is about ten times that for oxygen. Low ratios of these are indicative of fast solar wind streams. The Fe/O ratio is also provided as a proxy for the strength of the first ionization potential (FIP) fractionation when divided by the standard solar abundance value for Fe/O of about 0.05. Other data parameters include the alpha particle speed and the number of 13-min instrument cycles (normally 12 to 14) used for each 3-hour value. Each ASCII data file contains up to one year of data. The experiment and data processing are further described in G. Gloeckler, et al., The Solar Wind Ion Composition Spectrometer, Astron. Astrophys., 92(2), 267-289, 1992.

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Version:2.2.2

NumericalData

ResourceID
spase://NASA/NumericalData/Ulysses/SWICS/IonsRatios/PT3H
ResourceHeader
ResourceName
Ulysses SWICS Selected Charge States and Ratios of Solar Wind Heavy Ions 3-Hour Data
ReleaseDate
2020-07-07 21:15:49Z
Description

This ASCII data set consists of three hour averages of selected charge states and abundance ratios for solar wind heavy ions. The average charge state of Fe is given for states from Fe6+ to Fe16+; normal values vary from 9 to 12 in slow and fast solar wind with higher values in coronal mass ejection (CME) events. For carbon and oxygen the C6+/C5+ and O7+/O6+ ratios are given. The carbon on ratio is about ten times that for oxygen. Low ratios of these are indicative of fast solar wind streams. The Fe/O ratio is also provided as a proxy for the strength of the first ionization potential (FIP) fractionation when divided by the standard solar abundance value for Fe/O of about 0.05. Other data parameters include the alpha particle speed and the number of 13-min instrument cycles (normally 12 to 14) used for each 3-hour value. Each ASCII data file contains up to one year of data. The experiment and data processing are further described in G. Gloeckler, et al., The Solar Wind Ion Composition Spectrometer, Astron. Astrophys., 92(2), 267-289, 1992.

Acknowledgement
Use of these data in publications should be accompanied by acknowledgements of the NASA Space Physics Data Facility, the National Space Science Data Center and the responsible Principal Investigator defined in the experiment documentation provided here.
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/George.Gloeckler
2.TechnicalContactspase://SMWG/Person/Rudolf.Von.Steiger
PriorIDs
spase://VSPO/NumericalData/Ulysses/SWICS/IonsRatios/PT3H
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description

In ASCII via nssdcftp

AccessURL
Name
HTTPS from SPDF
URL
Description

In CDF via HTTP from SPDF

Format
Text
ProviderProcessingLevel
CALIBRATED
InstrumentIDs
MeasurementType
IonComposition
TemporalDescription
TimeSpan
StartDate
1990-12-07 00:00:00
StopDate
2009-06-29 23:59:59
Cadence
PT3H
ObservedRegion
Heliosphere