<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 05:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.49 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.18 (108) 05:20:00</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">
FF202610804180520001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="3.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.594" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.039" 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="3.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="217.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="217.500" 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="0.075" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.125" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="273.368" 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="247.954" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="213.246" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.379" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="49.060" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="1.544" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="27.192" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="37.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.530" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="55">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
217.500 217.500 217.500 217.500 217.500 220.000 220.000 220.000 220.000 220.000 222.500 222.500 222.500 222.500 225.000 225.000 225.000 227.500 227.500 227.500 227.500 230.000 230.000 230.000 232.500 232.500 235.000 235.000 237.500 237.500 240.000 240.000 242.500 242.500 245.000 245.000 247.500 249.365 251.402 253.634 256.092 258.812 261.837 265.223 269.038 273.368 278.326 284.060 290.766 298.715 308.287 320.037 334.803 353.918 379.634
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 78 78 78 78 75 78 90 93 69 66 54 57 66 63 66 69 81 81 87 84 69 69 69 66 78 78 69 66 72 69 72 72 57 57 54 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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="569">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
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</AltitudeList>
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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="3.35" PeakHeight="247.954" Num="5" zHalfNm="213.246" Error="1.208">
-77.633 24.589 -14.731 6.102 -1.031
</ShiftedChebyshev>
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<QuasiParabolic ID="4" StartDistance="6554.0" EndDistance="6556.0" A="8.6881002E12" B="-2.6513984E9" C="202285.81" Error="0.0274"/>
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</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="75.25" Depth="0.154"/>
<TopsideChapman PeakHeight="247.954" PeakDensity="139236.97" PeakScaleHeight="27.192" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
