<?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/upc/CompositeProcess_UPC-RapidNetwork_GIM"/> -->
<om:procedure xlink:href="https://metadata.pithia.eu/resources/2.2/process/rob/CompositeProcess_ROB-IONO_GNSS_Software"/>
<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_ROB-IONO_NRT_EU_TEC_Maps</localID>
<namespace>rob</namespace>
<version>1</version>
<creationDate>2023-03-15T14:30:00Z</creationDate>
<lastModificationDate>2024-02-16T14:30:00Z</lastModificationDate>
</PITHIA_Identifier>
</identifier>
<name>ROB-IONO Near-Real Time European Ionospheric Maps</name>
<description>
Vertical Total Electron Content maps based on multi-GNSS observations (GPS+Galileo+GLONASS) of the EUREF Permanent Network.
The VTEC maps allow GNSS users to have an estimation of the ionospheric delay induced along the signal of the observed satellite.
TEC data publicly available in IONEX files at https://gnss.be/SpaceWeather/Products/IONEX/.
Using ROB-IONO software, 5-minutes ionospheric VTEC maps are produced in near real time above Europe from the GNSS stations of the EUREF Permanent
Network (EPN). To do so, the Slant Total Electron Content (STEC) of GNSS satellite-receiver pairs are estimated and projected in VTEC
at the Ionospheric Piercing Points (IPP) using an ionospheric single thin layer shell approximation located at 450 km. The VTECs at
the IPPs are then interpolated in a grid of 0.5°x05° using spline interpolation. Products such as orbits and satellite Differential Code
Biases (DCB) are taken from the International GNSS Service (IGS) and from the Center for Orbit Determination in Europe (CODE).
The receiver DCBs are estimated at ROB using Rapid Ionex of the IGS as a priori information.
</description>
<type xlink:href="https://metadata.pithia.eu/ontology/2.2/instrumentType/GNSS-receiver"/>
<project xlink:href="https://metadata.pithia.eu/resources/2.2/project/rob/Project_ROB_GNSS-SW"/>
<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/rob/Individual_ROB_Bergeot"/>
<party xlink:href="https://metadata.pithia.eu/resources/2.2/individual/rob/Individual_ROB_Chevalier"/>
</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_ROB"/>
</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/Download"/> <!-- use the serviceFunction vocabulary -->
<linkage><gmd:URL>https://gnss.be/SpaceWeather/Products/IONEX/</gmd:URL></linkage>
<name>HTTPS for ROB-IONO European Near Real Time TEC Maps in IONEX Files</name>
<protocol>HTTPS</protocol>
<description>
Ionex files are available for download in https. the filename is organised so that, ROBR[DDD][H][MM].[YY]I.gz
with DDD for Day Of Year [1-365], H Capital alphabet letter corresponding to the hour (00:A, 01:B, ..., 23:X), MM minutes of the begining of the sample and YY the two last digits of the year.
For example for the 25 December 2023 from 12:00 UTC to 12:05 UTC, the corresponding file is :
https://gnss.be/SpaceWeather/Products/IONEX/2023/359/ROBR359M00.23I.gz
</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/L3"/>
<qualityAssessment>
<dataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/dataQualityFlag/DQ1"/>
<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/MQ4"/>
<metadataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/metadataQualityFlag/MQ9"/>
</qualityAssessment>
<!-- <permission xlink:href="https://metadata.pithia.eu/ontology/2.2/licence/CCBYNCSA"/> -->
<permission xlink:href="https://metadata.pithia.eu/ontology/2.2/licence/rob"/>
</DataCollection>
