<?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/dlr-so/CompositeProcess_NTCM-G"/>
<om:observedProperty/>
<om:featureOfInterest>
<FeatureOfInterest>
<namedRegion xlink:href="https://metadata.pithia.eu/ontology/2.2/featureOfInterest/Earth_Ionosphere"/>
</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_NTCM-G</localID>
<namespace>pithia</namespace>
<version>1</version>
<creationDate>2024-08-12T12:00:00Z</creationDate>
<lastModificationDate>2024-08-12T12:00:00Z</lastModificationDate>
</PITHIA_Identifier>
</identifier>
<name>NTCM G: Galileo single-frequency ionospheric corrections model</name>
<description>
The Neustrelitz Total Electron Content (TEC) Model for Galileo satellite navigation systems NTCM G can be used to determine Galileo single-frequency ionospheric corrections. It is proposed as an alternative to the reference algorithm NeQuick G. The model was developed by the German Aerospace Center (DLR) and validated with the support of ESA, and the Joint Research Centre (JRC) of the European Commission. The reduced complexity and runtime of the NTCM G algorithm are beneficial, in particular in user-segments where the equipment has limited resources available, like for civil avionics receivers or location-based services for smartphones.
</description>
<type xlink:href="https://metadata.pithia.eu/ontology/2.2/computationType/EmpiricalModel"/>
<project xlink:href="https://metadata.pithia.eu/resources/2.2/project/dlr-so/Project_DLR-SO_IMPC"/>
<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/dlr-so/Individual_DLR-SO_IMPC-UHD"/>
</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_DLR-SO"/>
</ResponsiblePartyInfo>
</relatedParty>
<collectionResults>
<source>
<OnlineResource>
<serviceFunction xlink:href="https://metadata.pithia.eu/ontology/2.2/serviceFunction/Download"/>
<linkage><gmd:URL>https://www.gsc-europa.eu/support-to-developers/ionospheric-correction-algorithms/galileo-ntcm-g-source-code</gmd:URL></linkage>
<name>Model implementation/source</name>
<protocol>HTTP</protocol>
<description>The source code of the NTCM G algorithm is available from the European GNSS Service Centre after registration.</description>
<dataFormat xlink:href="https://metadata.pithia.eu/ontology/2.2/resultDataFormat/text-plain"/>
</OnlineResource>
</source>
<source>
<OnlineResource>
<serviceFunction xlink:href="https://metadata.pithia.eu/ontology/2.2/serviceFunction/Application"/>
<linkage><gmd:URL>https://impc.dlr.de/products/modelling/swagger-ui/</gmd:URL></linkage>
<name>IMPC NTCM G</name>
<protocol>HTTP</protocol>
<description>The Neustrelitz Total Electron Content (TEC) Model for Galileo satellite navigation systems NTCM G can be used to determine Galileo single-frequency ionospheric corrections.</description>
<dataFormat xlink:href="https://metadata.pithia.eu/ontology/2.2/resultDataFormat/application-json"/>
</OnlineResource>
</source>
</collectionResults>
<dataLevel xlink:href="https://metadata.pithia.eu/ontology/2.2/dataLevel/L4"/>
<qualityAssessment>
<dataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/dataQualityFlag/DQ4"/>
<metadataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/metadataQualityFlag/MQ1"/>
</qualityAssessment>
<permission xlink:href="https://metadata.pithia.eu/ontology/2.2/licence/CCBYNCSA"/>
</DataCollection>
