<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-16 -106 05:35:00.000"
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: 100%</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.16 (106) 05:35:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.19" 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">
FF202610604160535001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.198" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="8.634" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.075" 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="0.125" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="330.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="298.919" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.339" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.369" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="46.484" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.960" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="24.646" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="46.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.3 2.325 2.35 2.375 2.4 2.425 2.45 2.475 2.5 2.525 2.55 2.575 2.6 2.625 2.65 2.675 2.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
307.500 307.500 312.500 315.000 318.333 321.667 325.000 327.500 330.000 336.875 343.750 350.625 357.500 362.500 380.000 390.000 406.248
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 51 75 0 0 63 69 66 0 0 0 63 63 63 66 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.5625 -1.5625 -1.5625 1.5625 1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 -1.5625 -1.5625 1.5625 -1.5625 -1.5625 1.5625 1.5625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="564">
<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="2.7" PeakHeight="298.919" Num="5" zHalfNm="266.339" Error="1.28">
-79.026 0.816 -0.909 0.413 -0.225
</ShiftedChebyshev>
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<ProfileValley Model="ULCAR" Width="109.988" Depth="0.154"/>
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