An official website of the United States government
Here's how you know v
Official websites use .gov
A .gov websites belongs to an official government organization in the United States
Secure .gov website use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Data Access
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
CDAWeb
WebService:
CDAWeb Programmatic Data Access
HAPI: CDAWeb HAPI Server
DE 2 1-sec NACS Temperature and Composition data
var authors='Carignan, George, R.; Candey, Robert, M.';
document.write(authors);
(2023).
DE 2 1-sec NACS Temperature and Composition data.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/j8kp-5y58. Accessed on document.write(currentDateStr);.
Note: Proper references, including
Copy BibTeX Citation
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/DE2/NACS/PT1S
Description
This data set containss, at 1-sec resolution, the neutral temperature and the densities (and % error) of O, N2, He, N, and Ar from the Neutral Atmosphere Composition Spectrometer (NACS) flown on DE 2. Composition data are most reliable at altitudes less than 500 km. Data are available in ASCII from nssdcftp and in CDF format from CDAWeb (as well as CDAWeb plots and lists).
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/DE2/NACS/PT1S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
DE 2 1-sec NACS Temperature and Composition data
AlternateName
Dynamics Explorer 2 NACS data
AlternateName
DE-B NACS data
DOI
https://doi.org/10.48322/j8kp-5y58
ReleaseDate
2025-12-04 13:29:08Z
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
RevisionEvent
ReleaseDate
2025-09-04 12:34:56.789
Note
Revised ObservedRegion. JMW
RevisionEvent
ReleaseDate
2025-10-02 15:11:48Z
Note
Updated PublishedBy name to match ROR Registry. Added ResourceType and NamingAuthority. 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 updated value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:29:08Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
Description
This data set containss, at 1-sec resolution, the neutral temperature and the densities (and % error) of O, N2, He, N, and Ar from the Neutral Atmosphere Composition Spectrometer (NACS) flown on DE 2. Composition data are most reliable at altitudes less than 500 km. Data are available in ASCII from nssdcftp and in CDF format from CDAWeb (as well as CDAWeb plots and lists).
Acknowledgement
Please acknowledge the NACS Principal Investigator, Dr. George Carignan
PublicationInfo
Authors
Carignan, George, R.; Candey, Robert, M.
PublicationDate
2023-01-01 00:00:00
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/George.R.Carignan
2.
GeneralContact
spase://SMWG/Person/Robert.M.Candey
3.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
Readme file at SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/de/de2/neutral_gas_nacs/00readme.txt
PriorIDs
spase://VSPO/NumericalData/DE2/NACS/PT1S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
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/de/de2/neutral_gas_nacs/
Description
For ftp retrieval of daily CDF files
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/de/de2/neutral_gas_nacs/
Description
In CDF via HTTP from CDAWeb
Format
CDF
DataExtent
Quantity
600
Units
KB
Per
P1D
Acknowledgement
Please acknowledge the NACS Principal Investigator, Dr. George Carignan and the Space Physics Data Facility at NASA/GSFC
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
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
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=DE2_NEUTRAL1S_NACS&index=sp_phys
ProductKey
DE2_NEUTRAL1S_NACS
Description
For CDAWeb subset, plot and list capabilities
Format
Text
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/de/de2/neutral_gas_nacs/neutral1s_nacs_cdaweb/$Y
AccessFilenameTemplate
de2_neutral1s_nacs_$Y$m$d_$v.cdf
DataExtent
Quantity
100
Units
KB
Per
PT1H
Acknowledgement
Please acknowledge the NACS Principal Investigator, Dr. George Carignan, 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_NEUTRAL1S_NACS/clientLibraryExample/
Style
WebService
ProductKey
DE2_NEUTRAL1S_NACS
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
Please acknowledge the NACS Principal Investigator, Dr. George Carignan, and the Space Physics Data Facility at NASA/GSFC
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
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
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
DE2_NEUTRAL1S_NACS
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
Please acknowledge the NACS Principal Investigator, Dr. George Carignan, and the Space Physics Data Facility at NASA/GSFC
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/DynamicsExplorer2/NACS
MeasurementType
NeutralGas
TemporalDescription
TimeSpan
StartDate
1981-08-08 00:00:00
StopDate
1983-02-15 00:00:00
Cadence
PT1S
ObservedRegion
Earth.NearSurface.Thermosphere
ObservedRegion
Earth.NearSurface.Atmosphere
ObservedRegion
Earth.NearSurface.AuroralRegion
ObservedRegion
Earth.NearSurface
ObservedRegion
Earth.NearSurface.Ionosphere
ObservedRegion
Earth.NearSurface.PolarCap