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GIRO Ionogram Plots

ResourceID
spase://GBO/DisplayData/GIRO/GRM/PT15M

Description

Collection of GIRO ionogram images at University of Massachusetts Lowell, covering selected ionosonde stations and periods of time from 1987-01-01 to current time, including 42 real-time data feeds. Total number of GIRO locations represented is 68 as of February 14, 2012. Access to images is arranged via a webpage containing a browsable data availability table. GIRO ionograms are visualized by plotting images in which received signal strength (color scale) is a function of echo delay (virtual range in vertical scale) and ionosonde frequency (horizontal scale) of the transmitted pulses. Echoes that can be used to derive remote vertical electron-density profiles, appear as discrete traces on ionograms. The ionogram traces are extracted (scaled) using image recognition software to obtain ionogram-derived characteristics of ionospheric plasma. Extracted traces and a table of major ionospheric characteristics are superimposed on the ionogram image

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Details

Version:2.5.0

DisplayData

ResourceID
spase://GBO/DisplayData/GIRO/GRM/PT15M
ResourceHeader
ResourceName
GIRO Ionogram Plots
ReleaseDate
2019-05-05 12:34:56Z
RevisionHistory
RevisionEvent
ReleaseDate
2023-07-28 13:02:30
Note
Edited Acknowledgement, AccessURL, InformationURL, added Contact, SpatialCoverage and updated SPASE version. LNG
Description

Collection of GIRO ionogram images at University of Massachusetts Lowell, covering selected ionosonde stations and periods of time from 1987-01-01 to current time, including 42 real-time data feeds. Total number of GIRO locations represented is 68 as of February 14, 2012. Access to images is arranged via a webpage containing a browsable data availability table. GIRO ionograms are visualized by plotting images in which received signal strength (color scale) is a function of echo delay (virtual range in vertical scale) and ionosonde frequency (horizontal scale) of the transmitted pulses. Echoes that can be used to derive remote vertical electron-density profiles, appear as discrete traces on ionograms. The ionogram traces are extracted (scaled) using image recognition software to obtain ionogram-derived characteristics of ionospheric plasma. Extracted traces and a table of major ionospheric characteristics are superimposed on the ionogram image

Acknowledgement
Heavy investments of time, effort, expertise, and funds continue to be made to produce, collect, quality control, interpret, and archive ionosonde data. It is therefore important that the data suppliers and Lowell GIRO Data Center (LGDC) are appropriately acknowledged in scientific publications that include analysis of data obtained from LGDC servers. Please read Rules of the Road https://giro.uml.edu/didbase/RulesOfTheRoad.html for license information and refer to Acknowledgements List https://giro.uml.edu/didbase/acknowledgements.htm to use GIRO data per license requirements.
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/Bodo.W.Reinisch
2.DataProducer
TechnicalContact		spase://SMWG/Person/Ivan.A.Galkin
3.MetadataContactspase://SMWG/Person/Leonard.N.Garcia
InformationURL
Name
GIRO (Global Ionospheric Radio Observatory) Home Page
URL
https://giro.uml.edu
Description

Access to real-time data and software tools

Language
en
Association
AssociationID
spase://SMWG/Observatory/GIRO
AssociationType
ObservedBy
PriorIDs
spase://VWO/DisplayData/GIRO/GRM.PT15M
spase://VSPO/DisplayData/GIRO/GRM/PT15M
AccessInformation
RepositoryID
spase://SMWG/Repository/UML/DIDBase
Availability
Online
AccessRights
Open
AccessURL
Name
GIRO DIDBase Ionogram Browser
URL
https://giro.uml.edu/didbase/
Description

Repository of GIRO ionogram images at University of Massachusetts Lowell, containing browsable interface to retrieve individual images.

Language
en
Format
PNG
Encoding
None
DataExtent
Quantity
1500000000
Units
byte
Per
PT15M
Acknowledgement
Heavy investments of time, effort, expertise, and funds continue to be made to produce, collect, quality control, interpret, and archive ionosonde data. It is therefore important that the data suppliers and Lowell GIRO Data Center (LGDC) are appropriately acknowledged in scientific publications that include analysis of data obtained from LGDC servers. Please read Rules of the Road https://giro.uml.edu/didbase/RulesOfTheRoad.html for license information and refer to Acknowledgements List https://giro.uml.edu/didbase/acknowledgements.htm to use GIRO data per license requirements.
ProcessingLevel
Calibrated
ProviderProcessingLevel
Level 2, ionogram data processed for extraction of ionospheric characteristics. All images produced by ShowIonogram servlet from raw and processed data.
InstrumentIDs
spase://SMWG/Instrument/GIRO/Ionosonde
MeasurementType
Waves.Active
TemporalDescription
TimeSpan
StartDate
1987-01-01 00:00:05Z
RelativeStopDate
P 5M
Note
Cadence of ionogram measurements may vary depending on the scheduling requirements at GIRO sites; 15 minutes is nominal cadence
Cadence
PT15M
Exposure
PT1M
SpectralRange
RadioFrequency
DisplayCadence
PT15M
ObservedRegion
Earth.NearSurface.Ionosphere
SpatialCoverage
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEO
Caveats
While 100% of all ionograms are processed automatically (autoscaled) to extract ionospheric characteristics, less than 7% of all processed ionograms are validated manually to ensure quality of interpretation. Autoscaled characteristics are accompanied by Confidence Score ranging from 0 to 100 to indicate quality of autoscaling determined by the autoscaling software itself. Manually interpreted data are provided with confidence score of 100.
Keywords
Ionogram
Echo
Trace
Electron Density Profile
Ionogram-derived Ionospheric Characteristics
Parameter #1
Name
Signal Strength
Description

Received signal strength, expressed as AC Electric Field in dB units relative to digitizer 1.

Cadence
PT15M
Units
dB
Wave
WaveType
PlasmaWaves
Qualifier
Magnitude
Qualifier
Pseudo
WaveQuantity
ACElectricField
FrequencyRange
SpectralRange
RadioFrequency
Low
500
High
30000
Units
kHz