spase-metadata.org SPASE landing pages.

Data Access

SESAME Advanced Ionospheric Sounder, Key Parameters

ResourceID
spase://NASA/NumericalData/SESAME/KeyParameters/AIS/PT900S

Description

This set of key parameters from the SESAME (Satellite Experiments Simultaneous with Antartic MEasurements) ground-based experiment contains ionospheric parameters that are derived from quarter-hourly ionograms. The three parameters include the lowest plasma frequency recorded and the highest plasma frequency recorded from the E-region (MHz), and the highest plasma frequency recorded from the F-region (MHz). Please see references: (1) Grubb, RN, The NOAA SEL HF Radar system (ionospheric sounder) NOAA Tech Memo ERL SEL-55, Space Environ Lab, Boulder, CO, 1979, (2) Jarvis,MJ and Dudeney ,JR Reduction of ambiguities in HF radar results through a revised receiving array and sounding pattern. Radio Sci 21, 151-158, 1986, and (3) Dudeney, J. R. et. al., Satellite Experiments Simultaneous with Antarctic Measurements (SESAME), Space Science Reviews, Volume 71, Issue 1-4, pp. 705-742, 1995.

View XML | View JSON | Edit

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/SESAME/KeyParameters/AIS/PT900S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
SESAME Advanced Ionospheric Sounder, Key Parameters
ReleaseDate
2026-07-21 12:07:12Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-12-04 13:31:27Z
Note
Added MetadataRightsList and RightsList(s). Added ResourceType and NamingAuthority. Updated to 2.7.1. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:07:12Z
Note
Added HelioData InformationURL. JWL
Description

This set of key parameters from the SESAME (Satellite Experiments Simultaneous with Antartic MEasurements) ground-based experiment contains ionospheric parameters that are derived from quarter-hourly ionograms. The three parameters include the lowest plasma frequency recorded and the highest plasma frequency recorded from the E-region (MHz), and the highest plasma frequency recorded from the F-region (MHz). Please see references: (1) Grubb, RN, The NOAA SEL HF Radar system (ionospheric sounder) NOAA Tech Memo ERL SEL-55, Space Environ Lab, Boulder, CO, 1979, (2) Jarvis,MJ and Dudeney ,JR Reduction of ambiguities in HF radar results through a revised receiving array and sounding pattern. Radio Sci 21, 151-158, 1986, and (3) Dudeney, J. R. et. al., Satellite Experiments Simultaneous with Antarctic Measurements (SESAME), Space Science Reviews, Volume 71, Issue 1-4, pp. 705-742, 1995.

Contacts
Role Person StartDate StopDate Note
1. GeneralContact spase://SMWG/Person/J.R.Dudeney
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/SESAME_KeyParameters_AIS_PT900S
Description

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

PriorIDs
spase://VSPO/NumericalData/P_SESAME_K0_AIS
spase://VSPO/NumericalData/SESAME/KeyParameters/AIS/PT900S
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/sesame/ais/
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/sesame/ais/
Description

In CDF via HTTP from CDAWeb

Format
CDF
Acknowledgement
Please acknowledge data provider, J.R. Dudeney at the British Antarctic Survey and SPDF when using these data.
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
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=SE_K0_AIS&index=sp_phys
ProductKey
SE_K0_AIS
Description

Plots, lists, and files from CDAWeb. Name of the data resource:SE_K0_AIS

Format
Text
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
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
SE_K0_AIS
Description

Web Service to this product using the HAPI interface.

Format
CSV
ProviderProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/SESAME/AIS
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1992-09-01 00:00:00.000Z
StopDate
2001-10-17 23:59:59.000Z
Cadence
PT900S
ObservedRegion
Earth.NearSurface.Ionosphere