<?xml version="1.0" encoding="UTF-8"?>
<DataCollection xmlns="https://metadata.pithia.eu/schemas/2.2" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:om="http://www.opengis.net/om/2.0" xsi:schemaLocation="https://metadata.pithia.eu/schemas/2.2 https://metadata.pithia.eu/schemas/2.2/pithia.xsd">
<!--
First report some required elements from ISO standard for Observation
-->
<om:phenomenonTime/><!-- DO NOT USE, we report phenomenon time only in Catalogs -->
<om:resultTime/> <!-- DO NOT USE, we report result time only in Catalogs -->
<om:procedure xlink:href="https://metadata.pithia.eu/resources/2.2/process/lgdc/CompositeProcess_DIDBase_ManualScaling"/>
<om:observedProperty/> <!-- DO NOT USE, we define all observed properties in the Procedure above -->
<om:featureOfInterest>
<FeatureOfInterest>
<namedRegion xlink:href="https://metadata.pithia.eu/ontology/2.2/featureOfInterest/Earth_Ionosphere_F-Region_Bottomside"/>
<namedRegion xlink:href="https://metadata.pithia.eu/ontology/2.2/featureOfInterest/Earth_Ionosphere_E-Region"/>
</FeatureOfInterest>
</om:featureOfInterest>
<om:result/> <!-- DO NOT USE, we use the CollectionResults below to specify URLs to provider) -->
<!--
Now our Data Collection elements next
-->
<identifier>
<PITHIA_Identifier>
<localID>DataCollection_DIDBase_VerifiedCleanScaling</localID>
<namespace>pithia</namespace>
<version>1</version>
<creationDate>2022-02-28T15:00:00Z</creationDate>
<lastModificationDate>2023-09-13T11:30:00Z</lastModificationDate>
</PITHIA_Identifier>
</identifier>
<name>DIDBase: Digital Ionogram DataBase, 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>
<!-- The function performed by the online resource is the landing page for the collection provider-->
<serviceFunction xlink:href="https://metadata.pithia.eu/ontology/2.2/serviceFunction/ViewOnly"/> <!-- use the serviceFunction vocabulary -->
<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.
</description>
<dataFormat xlink:href="https://metadata.pithia.eu/ontology/2.2/resultDataFormat/image-png"/>
</OnlineResource>
</source>
<source>
<OnlineResource>
<!-- The function performed by the online resource is the landing page for the collection provider-->
<serviceFunction xlink:href="https://metadata.pithia.eu/ontology/2.2/serviceFunction/Application"/> <!-- use the serviceFunction vocabulary -->
<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 data query window
</description>
<dataFormat xlink:href="https://metadata.pithia.eu/ontology/2.2/resultDataFormat/text-html"/>
</OnlineResource>
</source>
<source>
<OnlineResource>
<!-- The function performed by the online resource is the landing page for the collection provider-->
<serviceFunction xlink:href="https://metadata.pithia.eu/ontology/2.2/serviceFunction/Download"/> <!-- use the serviceFunction vocabulary -->
<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: To retrieve only verified-clean scaling data, select data rows with CS (confidence score) of 999.
</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>
