<?xml version="1.0" encoding="UTF-8"?>
<DataCollection xmlns="https://metadata.pithia.eu/schemas/2.2" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:om="http://www.opengis.net/om/2.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://metadata.pithia.eu/schemas/2.2 https://metadata.pithia.eu/schemas/2.2/pithia.xsd">
<om:phenomenonTime/>
<om:resultTime/>
<om:procedure xlink:href="https://metadata.pithia.eu/resources/2.2/process/lgdc/CompositeProcess_DIDBase_ManualScaling"/>
<om:observedProperty/>
<om:featureOfInterest>
<FeatureOfInterest>
<namedRegion xlink:href="https://metadata.pithia.eu/ontology/2.2/featureOfInterest/Earth_Ionosphere_E-Region"/>
<namedRegion xlink:href="https://metadata.pithia.eu/ontology/2.2/featureOfInterest/Earth_Ionosphere_F-Region_Bottomside"/>
</FeatureOfInterest>
</om:featureOfInterest>
<om:result/>
<identifier>
<PITHIA_Identifier>
<localID>DataCollection_DIDBase_VerifiedCleanScaling</localID>
<namespace>pithia</namespace>
<version>1</version>
<creationDate>2022-02-28T15:00:00Z</creationDate>
<lastModificationDate>2025-04-08T11:48:00Z</lastModificationDate>
</PITHIA_Identifier>
</identifier>
<name>Ionosonde: Digital Ionogram DataBase (DIDBase), manually scaled records</name>
<description>Digital Ionogram Database (DIDBase) collection contains vertical-incidence ionogram
measurements and ionogram-derived information acquired by Global Ionosphere Radio
Observatory (GIRO), https://giro.uml.edu, a network of ionosondes (high-frequency
remote sensing sounders). Ionosondes detect echoes of the probing signal of varying
frequency that correspond to reflections of the vertically transmitted signal from
various locations in the ionosphere illuminated by the signal. Resulting image of
the signal strength as function of the operating frequency and the time of flight
is called ionogram. When viewed in the ionogram frame, signal echoes form traces
that correspond to different plasma layers in the ionosphere. Interpretation of the
ionograms allows derivation and computation of actionable numerical information for
subsequent use in a variety of applied and research cases.</description>
<type xlink:href="https://metadata.pithia.eu/ontology/2.2/instrumentType/VerticalSounder"/>
<project xlink:href="https://metadata.pithia.eu/resources/2.2/project/lgdc/Project_LGDC_RION"/>
<relatedParty>
<ResponsiblePartyInfo>
<role xlink:href="https://metadata.pithia.eu/ontology/2.2/relatedPartyRole/PointOfContact"/>
<party xlink:href="https://metadata.pithia.eu/resources/2.2/individual/lgdc/Individual_LGDC_Galkin"/>
</ResponsiblePartyInfo>
</relatedParty>
<relatedParty>
<ResponsiblePartyInfo>
<role xlink:href="https://metadata.pithia.eu/ontology/2.2/relatedPartyRole/DataProvider"/>
<party xlink:href="https://metadata.pithia.eu/resources/2.2/organisation/pithia/Organisation_LGDC"/>
</ResponsiblePartyInfo>
</relatedParty>
<collectionResults>
<source>
<OnlineResource>
<serviceFunction xlink:href="https://metadata.pithia.eu/ontology/2.2/serviceFunction/Graphical"/>
<linkage>
<gmd:URL>https://giro.uml.edu/didbase/</gmd:URL>
</linkage>
<name>DIDBase Ionogram Image Portal</name>
<protocol>HTTPS</protocol>
<description>The DIDBase WebPortal is a landing page for browsing and display of ionogram images.
IMPORTANT: Each image shows the best available scaling, which may be an autoscaling. The scaler information is shown at the bottom of the left column of scaled data values. To retrieve only verified-clean scaling data, use SAO Explorer with DIDBase query.</description>
<dataFormat xlink:href="https://metadata.pithia.eu/ontology/2.2/resultDataFormat/image-png"/>
</OnlineResource>
</source>
<source>
<OnlineResource>
<serviceFunction xlink:href="https://metadata.pithia.eu/ontology/2.2/serviceFunction/ApplicationDownload"/>
<linkage>
<gmd:URL>https://ulcar.uml.edu/SAO-X/</gmd:URL>
</linkage>
<name>SAO Explorer for DIDBase ionograms</name>
<protocol>HTTPS</protocol>
<description>The SAO Explorer installation and documentation page. SAO Explorer is the main visualization and editing tool for ionogram and ionogram-derived data in DIDBase. IMPORTANT: To retrieve only verified-clean scaling data, select checkbox "Only manually scaled data" in the DIDBase query window.</description>
<dataFormat xlink:href="https://metadata.pithia.eu/ontology/2.2/resultDataFormat/text-html"/>
</OnlineResource>
</source>
<source>
<OnlineResource>
<serviceFunction xlink:href="https://metadata.pithia.eu/ontology/2.2/serviceFunction/Numerical"/>
<linkage>
<gmd:URL>https://giro.uml.edu/didbase/scaled.php</gmd:URL>
</linkage>
<name>FastChar</name>
<protocol>HTTPS</protocol>
<description>FastChar is a landing page for the LGDC servlet to retrieve numerical ionogram-derived data in DIDBase, formatted as a plain-text tabulation
IMPORTANT: FastChar shows the best available scaling data, which may be autoscaled. To use only verified-clean scaling data, look for rows with CS (confidence score) of 999. To retrieve only verified-clean scaling data, use SAO Explorer with DIDBase query for only manually-scaled data. </description>
<dataFormat xlink:href="https://metadata.pithia.eu/ontology/2.2/resultDataFormat/text-plain"/>
</OnlineResource>
</source>
</collectionResults>
<dataLevel xlink:href="https://metadata.pithia.eu/ontology/2.2/dataLevel/L0"/>
<dataLevel xlink:href="https://metadata.pithia.eu/ontology/2.2/dataLevel/L1"/>
<dataLevel xlink:href="https://metadata.pithia.eu/ontology/2.2/dataLevel/L2V"/>
<qualityAssessment>
<dataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/dataQualityFlag/DQ3"/>
<metadataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/metadataQualityFlag/MQ1"/>
<metadataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/metadataQualityFlag/MQ2"/>
<metadataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/metadataQualityFlag/MQ3"/>
<metadataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/metadataQualityFlag/MQ6"/>
<metadataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/metadataQualityFlag/MQ8"/>
<metadataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/metadataQualityFlag/MQ9"/>
</qualityAssessment>
<permission xlink:href="https://metadata.pithia.eu/ontology/2.2/licence/LGDC_SpaceDataPolicies"/>
</DataCollection>
