2.3.0 spase://GBO/DisplayData/GIRO/GRM/PT15M GIRO Ionogram Plots 2019-05-05T12:34:56Z 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 Users please acknowledge B. W. Reinisch of the University of Massachusetts Lowell for making these ionogram images available. spase://SMWG/Person/Bodo.W.Reinisch PrincipalInvestigator spase://SMWG/Person/Ivan.A.Galkin DataProducer TechnicalContact GIRO (Global Ionospheric Radio Observatory) Home Page http://giro.uml.edu Access to real-time data and software tools en spase://SMWG/Observatory/GIRO ObservedBy spase://VWO/DisplayData/GIRO/GRM.PT15M spase://VSPO/DisplayData/GIRO/GRM/PT15M spase://SMWG/Repository/UML/DIDBase Online Open GIRO DIDBase Ionogram Browser https://ulcar.uml.edu/DIDBase/ Repository of GIRO ionogram images at University of Massachusetts Lowell, containing browsable interface to retrieve individual images. en PNG None 1500000000 byte PT15M Users please acknowledge B. W. Reinisch of the University of Massachusetts Lowell for making these ionogram images available. Calibrated Level 2, ionogram data processed for extraction of ionospheric characteristics. All images produced by ShowIonogram servlet from raw and processed data. spase://SMWG/Instrument/GIRO/Ionosonde Waves.Active 1987-01-01T00:00:05Z PT5M Cadence of ionogram measurements may vary depending on the scheduling requirements at GIRO sites; 15 minutes is nominal cadence PT15M PT1M RadioFrequency PT15M Earth.NearSurface.Ionosphere 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. Ionogram Echo Trace Electron Density Profile Ionogram-derived Ionospheric Characteristics Signal Strength Received signal strength, expressed as AC Electric Field in dB units relative to digitizer 1. PT15M dB PlasmaWaves Magnitude Pseudo ACElectricField RadioFrequency 500 30000 kHz