<?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">
<identifier>
<PITHIA_Identifier>
<localID>ComputationCapabilities_eSWua_IONORING_NC_sTEC</localID>
<namespace>ingv</namespace>
<version>1</version>
<creationDate>2023-09-05T11:00:00Z</creationDate>
<lastModificationDate>2023-09-05T11:00:00Z</lastModificationDate>
</PITHIA_Identifier>
</identifier>
<name>eSWua IONORING tool: sTEC computation</name>
<description>
The sTEC is derived from the code observables on L1 and L2 frequencies. The calibration of the sTEC is obtained by using the method described by Ciraolo et al., 2007 [1], which evaluated the “differential code biases” (DCBs) for each station-satellite arc by exploiting a combination of code and phase observables. Although this calibration technique is robust and widely used, especially for mid-latitude and low-latitude studies, it has the intrinsic limitation of not being operating in real-time. This is because it assumes the availability of complete arcs of observations. To overcome this limitation and for the purposes of the real-time operation, the DCBs are evaluated for each station-satellite couple and for a given day by computing its mean value on the previous 3 days.
[1] Ciraolo, L., Azpilicueta, F., Brunini, C. et al. Calibration errors on experimental slant total electron content (TEC) determined with GPS. J Geod 81, 111–120 (2007). https://doi.org/10.1007/s00190-006-0093-1
</description>
<capabilities>
<processCapability>
<name>Slant Total Electron Content</name>
<observedProperty xlink:href="https://metadata.pithia.eu/ontology/2.2/observedProperty/TotalElectronContent_Slant"/>
<dimensionalityInstance xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityInstance/2DMultivaluePoints"/>
<dimensionalityTimeline xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityTimeline/2DTimeseriesStacked"/>
<units xlink:href="https://metadata.pithia.eu/ontology/2.2/unit/TECu"/>
</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/DiscreteLineIntegral"/>
<version/>
<softwareReference/>
<processingInput/>
<algorithm/>
</ComputationCapabilities>
