<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 18:50:00.000"
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="20.0">
<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="1 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 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) 18:50:00</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">
FF202610804181850001291296E02000002520000000001107201000080205120000B05040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="13.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.184" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="41.397" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.375" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.750" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.055" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="227.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="227.500" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="109.983" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="103.156" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="12.858" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.075" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="345.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.650" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.375" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.375" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="280.351" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.821" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.701" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.535" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.112" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.562" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="63.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="386">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.375 3.4 3.425 3.45 3.475 3.5 3.525 3.55 3.575 3.6 3.625 3.65 3.675 3.7 3.725 3.75 3.775 3.8 3.825 3.85 3.875 3.9 3.925 3.95 3.975 4.0 4.025 4.05 4.075 4.1 4.125 4.15 4.175 4.2 4.225 4.25 4.275 4.3 4.325 4.35 4.375 4.4 4.425 4.45 4.475 4.5 4.525 4.55 4.575 4.6 4.625 4.65 4.675 4.7 4.725 4.75 4.775 4.8 4.825 4.85 4.875 4.9 4.925 4.95 4.975 5.0 5.025 5.05 5.075 5.1 5.125 5.15 5.175 5.2 5.225 5.25 5.275 5.3 5.325 5.35 5.375 5.4 5.425 5.45 5.475 5.5 5.525 5.55 5.575 5.6 5.625 5.65 5.675 5.7 5.725 5.75 5.775 5.8 5.825 5.85 5.875 5.9 5.925 5.95 5.975 6.0 6.025 6.05 6.075 6.1 6.125 6.15 6.175 6.2 6.225 6.25 6.275 6.3 6.325 6.35 6.375 6.4 6.425 6.45 6.475 6.5 6.525 6.55 6.575 6.6 6.625 6.65 6.675 6.7 6.725 6.75 6.775 6.8 6.825 6.85 6.875 6.9 6.925 6.95 6.975 7.0 7.025 7.05 7.075 7.1 7.125 7.15 7.175 7.2 7.225 7.25 7.275 7.3 7.325 7.35 7.375 7.4 7.425 7.45 7.475 7.5 7.525 7.55 7.575 7.6 7.625 7.65 7.675 7.7 7.725 7.75 7.775 7.8 7.825 7.85 7.875 7.9 7.925 7.95 7.975 8.0 8.025 8.05 8.075 8.1 8.125 8.15 8.175 8.2 8.225 8.25 8.275 8.3 8.325 8.35 8.375 8.4 8.425 8.45 8.475 8.5 8.525 8.55 8.575 8.6 8.625 8.65 8.675 8.7 8.725 8.75 8.775 8.8 8.825 8.85 8.875 8.9 8.925 8.95 8.975 9.0 9.025 9.05 9.075 9.1 9.125 9.15 9.175 9.2 9.225 9.25 9.275 9.3 9.325 9.35 9.375 9.4 9.425 9.45 9.475 9.5 9.525 9.55 9.575 9.6 9.625 9.65 9.675 9.7 9.725 9.75 9.775 9.8 9.825 9.85 9.875 9.9 9.925 9.95 9.975 10.0 10.025 10.05 10.075 10.1 10.125 10.15 10.175 10.2 10.225 10.25 10.275 10.3 10.325 10.35 10.375 10.4 10.425 10.45 10.475 10.5 10.525 10.55 10.575 10.6 10.625 10.65 10.675 10.7 10.725 10.75 10.775 10.8 10.825 10.85 10.875 10.9 10.925 10.95 10.975 11.0 11.025 11.05 11.075 11.1 11.125 11.15 11.175 11.2 11.225 11.25 11.275 11.3 11.325 11.35 11.375 11.4 11.425 11.45 11.475 11.5 11.525 11.55 11.575 11.6 11.625 11.65 11.675 11.7 11.725 11.75 11.775 11.8 11.825 11.85 11.875 11.9 11.925 11.95 11.975 12.0 12.025 12.05 12.075 12.1 12.125 12.15 12.175 12.2 12.225 12.25 12.275 12.3 12.325 12.35 12.375 12.4 12.425 12.45 12.475 12.5 12.525 12.55 12.575 12.6 12.625 12.65 12.675 12.7 12.725 12.75 12.775 12.8 12.825 12.85 12.875 12.9 12.925 12.95 12.975 13.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
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</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>
<Trace Type="standard" Layer="E" Polarization="O" Num="13">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.75 2.775 2.8 2.825 2.85 2.875 2.9 2.925 2.95 2.975 3.0 3.025 3.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
109.983 110.912 111.906 112.978 114.141 115.412 116.818 118.391 120.183 122.270 124.783 127.961 132.346
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 0 0 0 0 0 42 0 42 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-3.125 3.125 -3.125 3.125 -3.125 -9.375 -3.125 3.125 3.125 -3.125 3.125 3.125 3.125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="808">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
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