<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-05-04 -124 04:00:00.000"
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 F2x cusp</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.05.04 (124) 04:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.21" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.99" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="75.82641" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202612405040400001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.375" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.116" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="10.518" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="307.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="307.500" 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="3.125" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="345.628" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="311.184" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="276.177" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.728" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="50.193" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.598" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="26.475" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="49.790" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.160" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.825 2.85 2.875 2.9 2.925 2.95 2.975 3.0 3.025 3.05 3.075 3.1 3.125 3.15 3.175 3.2 3.225 3.25 3.275 3.3 3.325 3.35 3.375
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
307.500 310.000 312.500 315.000 317.500 320.000 322.500 325.000 327.500 330.000 335.000 338.190 341.714 345.628 350.000 354.916 360.484 366.842 374.172 382.716 392.801 404.887 419.635 438.031
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
42 0 0 0 0 0 0 0 69 84 84 99 96 99 96 90 0 90 0 90 87 90 0 0
</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="622">
<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">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="3.375" PeakHeight="311.184" Num="5" zHalfNm="276.177" Error="1.763">
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<ProfileValley Model="ULCAR" Width="112.468" Depth="0.154"/>
<TopsideChapman PeakHeight="311.184" PeakDensity="141322.89" PeakScaleHeight="26.475" />
</Profile>
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