Daily definitive Ap index

<?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, not listed here yet.
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_Definitive_dailyAp</localID>
            <namespace>gfz</namespace>
            <version>2</version>
            <creationDate>2023-04-24T15:00:00Z</creationDate>
            <lastModificationDate>2024-10-08T13:00:00Z</lastModificationDate>
        </PITHIA_Identifier>
    </identifier>
    <name>Daily definitive Ap index</name>  
    <description>
        Three-hourly sub-auroral geomagnetic activity indicator provided by GFZ Potsdam, Germany. 
        Contributing observatories provide definitive K values to GFZ, that are standardized to Ks 
        and used to compute Kp as a mean. The ap index is then obtained as a linear scale representation 
        of Kp according to a mapping table. The Ap index is the daily mean of the eight values of 3-hourly ap indices.
    </description>
    <capabilities>
        <processCapability>
            <name>Ap index, definitive</name>
            <observedProperty xlink:href="https://metadata.pithia.eu/ontology/2.2/observedProperty/MagneticField"/>
            <!-- Dimensionality: here we account for 4 platform constellation of Cluster -->
            <dimensionalityInstance xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityInstance/0D"/>
            <dimensionalityTimeline xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityTimeline/1DTimeseries"/>
            <cadence unit="day">1</cadence>
        </processCapability>
    </capabilities>
    <dataLevel xlink:href="https://metadata.pithia.eu/ontology/2.2/dataLevel/L2"/>
    <type xlink:href="https://metadata.pithia.eu/ontology/2.2/computationType/Ap_index"/>
    <version/>
    <softwareReference/>
    <processingInput/>
    <algorithm/>
</ComputationCapabilities>