<?xml version="1.0" encoding="UTF-8"?>
<AcquisitionCapabilities 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>AcquisitionCapabilities_GNSS_Scintillation_Receiver_GSV4004A_GSV4004B</localID>
<namespace>pithia</namespace>
<version>1</version>
<creationDate>2022-02-08T10:30:00Z</creationDate>
<lastModificationDate>2022-05-08T11:30:00Z</lastModificationDate>
</PITHIA_Identifier>
</identifier>
<name>Acquisition capabilities of GNSS Scintillation Receiver GSV4004A/GSV4004B</name>
<description>
The instrument collects the GNSS signals from the line-of-sight satellites and tracks their
numerical counterparts. The RF front-end down-converts the input signal to a predefined
Intermediate Frequency (IF) prior to its sampling and quantization. Eventually, it provides
prompt In-Phase and Quadrature samples which can be used to estimate the signal Amplitude
variations, while the signal Phase variation can be derived through the output of the loop
filter in charge of tracking the IF carrier. The GSV4004A/GSV4004B provides the raw
GPSsamples at 50 Hz for all the visible GPS satellites (up to 10) for signal types L1-C/A
and L2-P, and up to 3 SBAS-GEO satellites.
</description>
<capabilities>
<processCapability>
<name>Signal Amplitude</name>
<observedProperty xlink:href="https://metadata.pithia.eu/ontology/2.2/observedProperty/WaveAmplitudeVariation"/>
<dimensionalityInstance xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityInstance/1DPoints"/>
<dimensionalityTimeline xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityTimeline/1DTimeseries"/>
<units xlink:href="https://metadata.pithia.eu/ontology/2.2/unit/dB"/>
</processCapability>
<processCapability>
<name>Signal Carrier-Phase</name>
<observedProperty xlink:href="https://metadata.pithia.eu/ontology/2.2/observedProperty/WavePhaseVariation"/>
<dimensionalityInstance xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityInstance/1DPoints"/>
<dimensionalityTimeline xlink:href="https://metadata.pithia.eu/ontology/2.2/dimensionalityTimeline/1DTimeseries"/>
<units xlink:href="https://metadata.pithia.eu/ontology/2.2/unit/rad"/>
</processCapability>
</capabilities>
<dataLevel xlink:href="https://metadata.pithia.eu/ontology/2.2/dataLevel/L1"/>
<qualityAssessment>
<dataQualityFlag xlink:href="https://metadata.pithia.eu/ontology/2.2/dataQualityFlag/DQ0"/>
</qualityAssessment>
<!-- <type
xlink:href="https://metadata.pithia.eu/ontology/2.2/computationType/GNSS-SignalProcessing" /> -->
<!--
use the instrumentType ontology to describe the type of the instrument -->
<!-- Instrument that has these acquisition capabilities -->
<instrumentModePair>
<InstrumentOperationalModePair>
<instrument xlink:href="https://metadata.pithia.eu/resources/2.2/instrument/novatel/Instrument_GNSS_Scintillation_Receiver_GSV4004A_GSV4004B"/>
<mode xlink:href="https://metadata.pithia.eu/resources/2.2/instrument/novatel/Instrument_GNSS_Scintillation_Receiver_GSV4004A_GSV4004B#GNSS-high-sampling-rate"/>
</InstrumentOperationalModePair>
</instrumentModePair>
</AcquisitionCapabilities>
