<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-08 -098 17:40:00.000"
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 9 0 1 0 0 0 0 0 55 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.49: Problems inverting F-trace to N(h)-profile</Comments>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.04.08 (098) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.56" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-41.19" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-15.97" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="78.74007" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202609804081740001291296E02000002520000000001107201000080205120000B05040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.175" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="7.550" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.087" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="37.590" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.075" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.125" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.075" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.280" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="95.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="287.500" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="92.730" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="92.500" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="92.021" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="1.971" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="360.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.972" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.575" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.138" Units="MHz" ModelName="IRI-90" />
<Modeled Name="foF2p" Val="10.654" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.300" Description="Minimum frequency of Es-layer" Units="MHz" />
</CharacteristicList>
<TraceList Num="4">
<Trace Type="standard" Layer="F2" Polarization="O" Num="185">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
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<RangeList Type="float" Units="km" Description="Group Range" >
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<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
84 87 90 90 102 102 87 87 84 81 75 72 63 63 45 48 24 24 45 39 66 69 96 99 99 99 96 90 0 93 99 102 102 102 102 102 93 93 81 81 54 54 54 51 75 78 102 102 102 99 96 0 0 0 0 78 84 90 99 99 96 93 0 0 96 96 87 93 96 96 0 81 84 93 60 63 99 99 69 75 54 54 90 93 57 48 87 87 87 87 90 90 93 93 60 60 96 87 78 78 78 78 75 78 93 96 96 96 60 60 60 60 60 60 99 102 102 99 99 99 96 93 93 90 87 87 90 90 87 87 87 81 84 87 87 90 54 51 54 54 54 57 54 54 54 51 54 51 54 51 84 0 0 39 42 45 42 0 0 0 45 42 48 51 54 54 54 51 48 45 48 51 48 51 45 45 39 42 39 39 45 42 42 39 39
</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 3.125 3.125 3.125 -3.125 -3.125 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 -3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 3.125 -3.125 3.125 3.125 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 -3.125 3.125 3.125 -3.125 3.125 3.125 3.125 -3.125 3.125 3.125 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 3.125 3.125 -3.125 3.125 3.125 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 3.125 -3.125 -3.125 -3.125 3.125 -3.125 -3.125 -3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 -3.125 3.125 3.125 3.125 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 -3.125 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 -3.125 3.125 3.125 3.125 -3.125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="31">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 96.250 97.500 97.500 97.500 111.071 124.643 138.214 151.786 165.357 178.929 192.500 206.071 219.643 233.214 246.786 260.357 273.929 287.500
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
87 90 90 81 81 69 69 69 69 96 96 96 96 75 72 72 72 0 0 0 0 0 0 0 0 0 0 0 0 0 69
</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 -3.125 -3.125 -3.125 -3.125 -3.125 -3.125 -3.125 -3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 -3.125 -3.125 -3.125 -3.125 3.125 -3.125 3.125 -3.125 -3.125 -3.125 -3.125 3.125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.075 3.1 3.125 3.15 3.175 3.2 3.225 3.25 3.275
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
92.730 93.161 93.620 94.111 94.641 95.216 95.845 96.540 97.319
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 75 63 63 63 0 0
</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 -3.125 3.125 -3.125 3.125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="74">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.000 95.000 95.000 95.000 95.000 92.500 92.500 92.500 92.500 92.500 95.000 92.500 92.569 92.639 92.708 92.778 92.847 92.917 92.986 93.056 93.125 93.194 93.264 93.333 93.403 93.472 93.542 93.611 93.681 93.750 93.819 93.889 93.958 94.028 94.097 94.167 94.236 94.306 94.375 94.444 94.514 94.583 94.653 94.722 94.792 94.861 94.931 95.000 95.000 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500 95.000 93.750 92.500 92.500 92.500 92.500 92.500 92.500 92.500 92.500
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 0 72 75 75 69 0 57 54 57 60 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 48 69 69 84 81 84 84 72 75 75 75 75 75 75 75 99 99 0 90 87 87 99 99 87 87 99
</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 3.125 -3.125 3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 -3.125 3.125 -3.125 -3.125 3.125 3.125 -21.875 -3.125 -3.125 -3.125 -3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 -3.125 -3.125 -3.125 -3.125 -3.125 -3.125 3.125 3.125 3.125 3.125 3.125 3.125 -3.125 -3.125 3.125 -3.125 -3.125 -3.125 3.125 3.125 3.125 -3.125 -3.125 3.125 -3.125 -3.125 3.125 -3.125 -3.125 -3.125 3.125 3.125 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="4">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 91.0 92.0 92.021
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.8045776 3.2798078 3.28

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="1" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.28" PeakHeight="92.021" Num="3" Error="0.508">
-2.998 1.284 -0.307
</ShiftedChebyshev>
</ShiftedChebyshevList>
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
