<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-20 -110 05:45:00.000"
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" >
2026.04.20 (110) 05:45:00</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">
FF202611004200545001291297002000002515000000001107301000080205120000B05040001
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="2.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.259" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="7.823" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="2.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="297.500" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="297.500" 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="0.025" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="2.275" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="333.291" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="291.994" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="260.421" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.355" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="44.899" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="0.740" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.967" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="44.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.280" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.075 2.1 2.125 2.15 2.175 2.2 2.225 2.25 2.275 2.3 2.325 2.35 2.375 2.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
297.500 297.500 307.500 310.833 314.167 317.500 320.242 323.606 327.830 333.291 340.626 351.001 366.800 393.777 450.299
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 63 0 0 75 0 0 0 0 0 0 0 0 0
</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 -7.8125 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="539">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
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</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
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</ProfileValueList>
</Tabulated>
<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="2.4" PeakHeight="291.994" Num="5" zHalfNm="260.421" Error="1.332">
-73.726 2.587 -1.777 0.808 -0.152
</ShiftedChebyshev>
</ShiftedChebyshevList>
<QuasiParabolicList Num="8" EarthRadius="6370.0">
<QuasiParabolic ID="0" StartDistance="6460.0205" EndDistance="6480.001" A="-5.5027394E11" B="1.69837632E8" C="-13104.63" Error="0.0016"/>
<QuasiParabolic ID="1" StartDistance="6480.0" EndDistance="6516.578" A="-1.13654858E11" B="3.507866E7" C="-2706.5613" Error="0.00174"/>
<QuasiParabolic ID="2" StartDistance="6516.578" EndDistance="6553.156" A="0.0" B="-788.0136" C="0.16096212" Error="0.0178"/>
<QuasiParabolic ID="3" StartDistance="6553.156" EndDistance="6555.0" A="3.11613194E12" B="-9.5087552E8" C="72539.03" Error="0.0"/>
<QuasiParabolic ID="4" StartDistance="6555.0" EndDistance="6588.0" A="-1.28252339E9" B="280649.2" C="-12.92648" Error="0.0798"/>
<QuasiParabolic ID="5" StartDistance="6588.0" EndDistance="6604.0" A="2.34441933E12" B="-7.1183283E8" C="54033.33" Error="0.0636"/>
<QuasiParabolic ID="6" StartDistance="6604.0" EndDistance="6638.0" A="3.28691692E12" B="-9.9726522E8" C="75643.9" Error="0.0337"/>
<QuasiParabolic ID="7" StartDistance="6638.0" EndDistance="6661.994" A="-6.3877389E12" B="1.91766579E9" C="-143920.05" Error="0.0124"/>
</QuasiParabolicList>
<ProfileValley Model="ULCAR" Width="109.734" Depth="0.154"/>
<TopsideChapman PeakHeight="291.994" PeakDensity="71464.02" PeakScaleHeight="23.967" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
