<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-18 -108 20:20:00.000"
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="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 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) 20:20:00</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">
FF202610804182020001291296E02000002520000000001107201000080205120000B05040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="13.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.328" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="44.101" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.025" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.575" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.025" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.055" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="215.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="215.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="102.661" Name="h`E" 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="12.375" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="312.500" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.936" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.575" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.575" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="258.904" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="214.958" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.849" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="61.078" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.359" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.164" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="57.110" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.990" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="428">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.575 2.6 2.625 2.65 2.675 2.7 2.725 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 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 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 13.025 13.05 13.075 13.1 13.125 13.15 13.175 13.2 13.225 13.25
</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" >
51 0 0 0 0 0 51 0 51 54 42 42 27 0 0 0 0 54 66 66 69 66 66 66 63 60 78 81 81 78 78 78 78 78 75 78 78 72 63 66 66 63 75 78 63 60 51 48 57 57 84 84 87 87 87 90 90 90 84 84 87 90 90 90 87 90 66 69 81 81 81 81 84 81 57 57 57 57 57 57 78 78 90 93 81 81 81 84 81 81 93 93 105 105 105 105 93 90 90 90 90 90 90 90 102 105 93 90 93 93 96 96 93 93 96 93 93 93 96 93 96 93 105 105 93 93 93 90 93 93 96 96 96 96 96 96 108 108 96 93 93 93 105 105 93 93 105 105 93 93 93 93 93 93 93 93 93 93 90 93 90 90 90 90 90 0 93 93 93 93 87 0 0 102 78 78 66 0 0 90 90 90 90 90 78 78 87 90 90 90 90 90 93 81 75 75 75 78 78 78 90 90 78 78 93 93 84 84 84 84 87 90 90 90 93 93 93 93 84 87 87 87 90 90 90 93 93 90 102 93 84 87 87 87 90 90 66 66 42 33 36 36 63 63 87 90 102 102 93 93 96 96 99 99 90 90 90 90 93 96 99 99 99 99 99 99 99 93 93 93 96 96 99 99 99 96 93 93 96 96 96 96 96 93 78 78 81 78 93 93 93 93 90 0 90 90 90 90 90 90 87 87 90 90 90 90 87 84 87 87 90 90 78 78 87 90 90 90 90 90 90 90 90 93 93 93 90 90 93 93 93 93 90 90 93 93 93 90 90 90 93 90 90 90 93 93 93 90 90 90 90 90 90 90 90 90 90 87 90 90 90 87 90 90 90 87 90 90 0 0 78 78 87 87 90 84 78 78 78 75 90 90 87 90 90 90 90 87 90 90 87 90 87 90 90 87 90 87 87 87 75 75 63 63 36 39 36 33 60 60 81 0 84 84 45 45 45 42 42 42 42 39 78 75 39 39 39 39
</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="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.025 2.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
102.661 103.319
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
39 39
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-3.125 3.125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.32" Type="vertical" >
<Tabulated Num="778">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
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<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.055" PeakHeight="110.0" Num="3" Error="0.0">
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<ProfileValley Model="ULCAR" Width="27.0" Depth="0.15"/>
<TopsideChapman PeakHeight="258.904" PeakDensity="2178194.8" PeakScaleHeight="31.164" />
</Profile>
</ProfileList>
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