<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-24 -055 02:50:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 8 0 0 0 0 0 0 0 55 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44: Problems inverting F-trace to N(h)-profile</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.02.24 (055) 02:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202605502240250009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="17" >
<URSI ID="00" Val="9.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.622" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.595" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="296.347" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.144" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="122">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 215.000 215.000 215.000 215.000 215.000 215.000 215.000 215.000 215.000 213.333 211.667 210.000 210.000 210.000 210.000 210.000 215.000 215.000 215.000 215.000 220.000 222.500 225.000 227.500 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 232.500 235.000 235.000 235.000 240.000 245.000 245.000 245.000 243.333 241.667 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 235.000 240.000 242.500 245.000 245.000 245.000 245.000 245.000 255.000 255.000 260.000 260.000 262.500 265.000 267.500 270.000 275.000 280.000 280.000 270.000 260.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 254.286 253.571 252.857 252.143 251.429 250.714 250.000 255.000 255.000 255.000 257.000 259.000 261.000 263.000 265.000 265.000 267.500 270.000 272.500 275.000 277.500 280.000 282.500 285.000 287.500 290.000 292.500 295.000 290.000 285.000 285.000 285.000 285.000 286.667 288.333 290.000 292.554 296.347 302.569 314.652 348.253
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 78 81 0 75 0 81 78 0 69 0 0 63 63 72 63 57 66 0 63 66 69 0 63 69 75 0 75 0 0 75 0 78 78 66 57 69 69 69 66 63 0 60 0 0 63 63 72 72 66 69 0 72 66 69 63 69 75 69 72 69 72 69 63 63 60 63 0 57 0 60 60 63 0 72 66 72 0 72 57 69 0 69 0 66 63 66 60 66 72 72 63 69 66 63 66 72 66 66 69 63 60 69 66 63 60 0 60 66 69 69 63 66 66 60 69 63 66 63 57 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
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