<?xml version="1.0" encoding="UTF-8"?>
<ComputationCapabilities 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" xsi:schemaLocation="https://metadata.pithia.eu/schemas/2.2 https://metadata.pithia.eu/schemas/2.2/pithia.xsd">
<!--
The computation process that produces observed properties from its input data.
Input data may be an acquisition or some other computatation.
Each newly computed observed property that this computation can produce is defined as its *capability*.
The list of capabilities is all-inclusive, even though not every computation can engage all capabilities.
-->
<identifier>
<PITHIA_Identifier>
<localID>ComputationCapabilities_UPC-RapidNetwork_CombiningObservations</localID>
<namespace>upc</namespace>
<version>1</version>
<creationDate>2022-12-01T09:33:07Z</creationDate>
<lastModificationDate>2023-01-10T22:31:00Z</lastModificationDate>
</PITHIA_Identifier>
</identifier>
<name>UPC-RapidNetwork: Combining Observations</name>
<description>
The pseudoranges and carrier phases in two frequencies are mutually substracted, in length units, in order
to remove the non-frequency dependent terms (such as distance, clock errors among others). In this way the
variable part of the remaining term is proportional to the Slant Total Electron Content (STEC), the main
input of the tomographic model.
</description>
<capabilities>
<processCapability>
<name>Ionospheric Delay</name>
<observedProperty xlink:href="https://metadata.pithia.eu/ontology/2.2/observedProperty/WaveTravelTime_EM"/>
<dimensionalityInstance xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityInstance/1DPoints"/>
<dimensionalityTimeline xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityTimeline/2DTimeseriesStacked"/>
<units xlink:href="https://metadata.pithia.eu/ontology/2.2/unit/sec"/>
</processCapability>
</capabilities>
<dataLevel xlink:href="https://metadata.pithia.eu/ontology/2.2/dataLevel/L2A"/>
<qualityAssessment>
<dataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/dataQualityFlag/DQ1"/>
</qualityAssessment>
<type xlink:href="https://metadata.pithia.eu/ontology/2.2/computationType/GNSS-SignalProcessing"/>
<version/>
<softwareReference/>
<processingInput/>
<algorithm/>
</ComputationCapabilities>
