<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-09 -099 19:20:00.000"
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="1 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.04.09 (099) 19:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609904091920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="5.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="4.573" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.296" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.950" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.110" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="145.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="145.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="80.695" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="80.059" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="2.144" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="200.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.537" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="153.993" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="120.795" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.196" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="41.617" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.135" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.703" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="51.710" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.410" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.45 5.5 5.55 5.6 5.65 5.7 5.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
145.000 275.000 265.000 255.000 195.000 197.500 200.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
9 0 0 0 0 0 12
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.95 2.0 2.05 2.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
80.695 81.780 82.940 84.184
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
15 9 0 18
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
2.734375 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="77">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
77.886 80.0 80.059 85.0 85.456 90.0 90.853 95.0 96.25 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 153.993 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.109 2.11 2.024 2.007 2.007 2.007 2.086 2.11 2.398 2.743 3.15 3.6 4.007 4.352 4.651 4.922 5.177 5.421 5.65 5.75 5.749 5.713 5.632 5.513 5.364 5.191 5.0 4.797 4.586 4.371 4.155 3.94 3.729 3.523 3.323 3.131 2.946 2.769 2.6 2.44 2.288 2.145 2.009 1.881 1.761 1.647 1.541 1.441 1.347 1.259 1.177 1.1 1.027 0.96 0.897 0.837 0.782 0.73 0.682 0.637 0.595 0.555 0.519 0.484 0.452 0.422 0.394 0.368 0.343 0.321 0.299 0.279 0.261 0.244 0.227 0.212

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.11" PeakHeight="80.059" Num="3" Error="0.351">
-3.133 1.215 -0.255
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.11" EndFrequency="5.75" PeakHeight="153.993" Num="5" zHalfNm="120.795" Error="5.364">
-51.104 -11.37 7.386 -4.147 1.492
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="16.191" Depth="0.103"/>
<TopsideChapman PeakHeight="153.993" PeakDensity="410204.72" PeakScaleHeight="22.703" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
