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DE 2 16ms Retarding Potential Analyzer (RPA) Ion Densities

(2023). DE 2 16ms Retarding Potential Analyzer (RPA) Ion Densities. [Data set]. NASA Space Physics Data Facility. https://doi.org/10.48322/aab6-jj49. Accessed on .

Note: Proper references, including 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/DE2/RPA/PT0.016S

Description
This data set contains total ion densities obtained at 16ms resolution from the DE 2 Retarding Potential Analyzer. Corrections for spacecraft potential were included in the density determinations. Data are available in ASCII from nssdcftp and in CDF format from CDAWeb (as well as CDAWeb plots and lists). The data span the 18-month DE 2 lifetime, except for a gap from 1981/317 to 1982/057.

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Details

Version:2.6.0

NumericalData

ResourceID
spase://NASA/NumericalData/DE2/RPA/PT0.016S
ResourceHeader
ResourceName
DE 2 16ms Retarding Potential Analyzer (RPA) Ion Densities
AlternateName
Dynamics Explorer 2 RPA Ion Density
AlternateName
DE-B RPA Ion Density
DOI
https://doi.org/10.48322/aab6-jj49
ReleaseDate
2023-07-30 12:34:56.789
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2023-07-30 12:34:56.789
Note
Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727
Description
This data set contains total ion densities obtained at 16ms resolution from the DE 2 Retarding Potential Analyzer. Corrections for spacecraft potential were included in the density determinations. Data are available in ASCII from nssdcftp and in CDF format from CDAWeb (as well as CDAWeb plots and lists). The data span the 18-month DE 2 lifetime, except for a gap from 1981/317 to 1982/057.
Acknowledgement
Please acknowledge the RPA Principal Investigators, Drs. W.B. Hanson (original P.I.) and R.A. Heelis
PublicationInfo
Authors
Heelis, Roderick, A.; Hanson, William, B.; Candey, Robert, M.
PublicationDate
2023-01-01 00:00:00
PublishedBy
NASA Space Physics Data Facility
Contacts
Role Person StartDate StopDate Note
1. PrincipalInvestigator spase://SMWG/Person/Roderick.A.Heelis
2. PrincipalInvestigator spase://SMWG/Person/William.B.Hanson
3. MetadataContact spase://SMWG/Person/James.M.Weygand
4. GeneralContact spase://SMWG/Person/Robert.M.Candey
5. MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze

InformationURL
Name
Readme file at SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/de/de2/plasma_rpa/
InformationURL
Name
NSSDC's Master Catalog on the Retarding Potential Analyzer (RPA)
URL
https://nssdc.gsfc.nasa.gov
Description
The Retarding Potential Analyzer (RPA) measured the bulk ion velocity in the direction of the spacecraft motion, the constituent ion concentrations, and the ion temperature along the satellite path. These parameters were derived from a least squares fit to the ion number flux vs energy curve obtained by sweeping or stepping the voltage applied to the internal retarding grids of the RPA. In addition, a separate wide aperture sensor, a duct sensor, was flown to measure the spectral characteristics of iregularities in the total ion concentration. The measured parameters obtained from this investigation were important to the understanding of mechanisms that influence the plasma; i.e., to understand the coupling between the solar wind and the earth's atmosphere. The measurements were made with a multigridded planar retarding potential analyzer very similar in concept and geometry to the instruments carried on the AE satellites. The retarding potential was variable in the range from approximately +32 to 0 volts. The details of this voltage trace, and whether it was continuous or stepped, depended on the operating mode of the instrument. Specific parameters deduced from these measurements were ion temperature; vehicle potential; ram component of the ion drift velocity; the ion and electron concentration irregularity spectrum; and the concentration of H+, He+, O+, and Fe+, and of molecular ions near perigee. Additional details are in W. B. Hanson et al., Space Sci. Instrum., v. 5, n. 4, p. 503, 1981.
PriorIDs
spase://VMO/NumericalData/DE2/VEFI/Ni/PT0.016S
spase://VSPO/NumericalData/DE2/RPA/PT0.016S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/de/de2/plasma_rpa/
Description
For ftp retrieval of daily CDF files
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/de/de2/plasma_rpa/
Description
In CDF via HTTP from CDAWeb
Format
CDF
DataExtent
Quantity
10
Units
MB
Per
P1D
Acknowledgement
Please acknowledge the RPA Principal Investigators, Drs. W.B. Hanson (original P.I.) and R.A. Heelis and the Space Physics Data Facility at NASA/GSFC
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=DE2_DUCT16MS_RPA&index=sp_phys
ProductKey
DE2_DUCT16MS_RPA
Description
For CDAWeb subset, plot and list capabilities
Format
Text
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/de/de2/plasma_rpa/rpa16ms_cdaweb/$Y
AccessFilenameTemplate
de2_duct16ms_rpa_$Y$m$d_$v.cdf
DataExtent
Quantity
1500
Units
KB
Per
PT2H
Acknowledgement
Please acknowledge the RPA Principal Investigators, Drs. W.B. Hanson (original P.I.) and R.A. Heelis and the Space Physics Data Facility at NASA/GSFC
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb Programmatic Data Access
URL
https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/DE2_DUCT16MS_RPA/clientLibraryExample/
Style
WebService
ProductKey
DE2_DUCT16MS_RPA
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
Please acknowledge the RPA Principal Investigators, Drs. W.B. Hanson (original P.I.) and R.A. Heelis and the Space Physics Data Facility at NASA/GSFC
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
DE2_DUCT16MS_RPA@0
ProductKey
DE2_DUCT16MS_RPA@1
ProductKey
DE2_DUCT16MS_RPA@2
ProductKey
DE2_DUCT16MS_RPA@3
ProductKey
DE2_DUCT16MS_RPA@4
ProductKey
DE2_DUCT16MS_RPA@5
ProductKey
DE2_DUCT16MS_RPA@6
ProductKey
DE2_DUCT16MS_RPA@7
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
Please acknowledge the RPA Principal Investigators, Drs. W.B. Hanson (original P.I.) and R.A. Heelis and the Space Physics Data Facility at NASA/GSFC
AccessInformation
RepositoryID
spase://SMWG/Repository/UCLA/DE2
Availability
Online
AccessRights
Open
AccessURL
Name
VMO UCLA
URL
http://vmo.igpp.ucla.edu/data1/DE2/RPA/Ni_16ms_ascii/
Description
Dynamics Explorer 2 Retarding Potential Analyzer 16 ms data
Format
Text
Encoding
ASCII
Acknowledgement
NASA; William B. Hanson; VMO
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/DynamicsExplorer2/RPA
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1981-08-03 00:00:00
StopDate
1983-02-17 00:00:00
Cadence
PT0.016S
ObservedRegion
Earth.NearSurface.Ionosphere
NASA Insignia
Contact SPDF: NASA-SPDF Feedback/Support
Responsible NASA Official: Robert M. Candey
Site Editor: Tami Kovalick
SPDF ROR ID
SPDF re3data ID
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Last Updated: 2023-07-30