<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 05:05:00.000"
URSICode="SMK29"
StationName="Santa Maria"
GeoLatitude="-29.69"
GeoLongitude="307.81"
Source="Ionosonde"
SourceType="DPS-4D"
ScalerType="auto">
<SystemInfo UMLStationID="129">
<FrequencyStepping StartFrequency="2.0" StopFrequency="15.0">
<LinearStepping Step="0.025" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="2.5" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 95% PACIFIC flags: Multiple candidates for F2o cusp</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.18 (108) 05:05:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.20" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.98" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="78.74007" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202610804180505001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.575" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.555" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.709" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.925" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="280.921" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="253.111" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.460" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.383" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="43.458" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.553" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.713" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="35.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="64">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 225.000 225.000 227.500 227.500 227.500 227.500 227.500 230.000 230.000 230.000 230.000 230.000 232.500 232.500 232.500 232.500 232.500 235.000 235.000 237.500 237.500 237.500 237.500 237.500 240.000 240.000 240.000 242.500 242.500 242.500 242.500 245.000 247.500 247.500 250.000 250.000 251.250 252.500 252.500 252.500 255.000 257.500 257.500 260.000 260.000 262.500 265.000 266.595 268.357 270.314 272.500 274.958 277.742 280.921 284.586 288.858 293.901 299.944 307.317 316.515 328.311 343.984 365.825
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="527">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
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<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
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</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="3.575" PeakHeight="253.111" Num="5" zHalfNm="222.46" Error="0.857">
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<ProfileValley Model="ULCAR" Width="80.5" Depth="0.154"/>
<TopsideChapman PeakHeight="253.111" PeakDensity="158568.55" PeakScaleHeight="23.713" />
</Profile>
</ProfileList>
</SAORecord>
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