<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 23:10:00.000"
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="14.0">
<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 2 0 0 0 0 0 0 0 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.10.23 (296) 23:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629610232310009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.231" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.068" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.800" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="371.015" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="331.480" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.419" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.851" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="34.921" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.155" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="15.893" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="45.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.040" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="69">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 355.000 350.000 345.000 345.000 347.500 350.000 350.000 355.000 355.000 355.000 360.000 360.000 362.143 364.286 366.429 368.571 370.714 372.857 375.000 360.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 345.000 345.000 345.000 350.000 350.000 350.000 350.625 351.250 351.875 352.500 353.125 353.750 354.375 355.000 350.000 350.000 345.000 345.000 350.000 355.000 360.000 360.000 360.000 360.000 365.000 365.032 365.068 365.112 365.165 365.229 365.310 365.414 365.553 365.750 366.048 366.554 367.597 371.015
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 66 69 0 66 0 66 75 69 66 69 69 63 0 0 0 0 0 0 63 0 66 66 0 0 66 0 63 0 63 66 66 0 63 63 63 0 0 66 0 0 0 0 66 66 66 60 60 63 0 63 63 60 57 0 63 60 0 63 0 57 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -1.171875 2.734375 -0.390625 1.953125 -1.171875 1.171875 0.390625 -0.390625 1.171875 1.171875 1.171875 1.953125 0.390625 1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 1.171875 0.390625 -0.390625 1.953125 1.171875 0.390625 2.734375 2.734375 2.734375 1.953125 1.953125 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 1.171875 1.953125 0.390625 0.390625 -1.171875 0.390625 1.171875 -0.390625 1.953125 0.390625 1.171875 1.171875 1.171875 -1.171875 1.171875 1.171875 2.734375 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="95">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.954 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.909 180.0 185.0 190.0 195.0 200.0 205.0 210.0 214.863 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 331.48 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.25 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.244 0.266 0.289 0.311 0.333 0.354 0.357 0.466 0.615 0.804 1.023 1.26 1.504 1.752 2.004 2.259 2.518 2.784 3.056 3.337 3.627 3.93 4.246 4.579 4.934 5.314 5.728 6.189 6.722 7.346 7.45 7.416 7.265 7.019 6.704 6.344 5.957 5.558 5.16 4.769 4.393 4.035 3.697 3.381 3.087 2.815 2.564 2.333 2.122 1.928 1.752 1.591 1.444 1.31 1.189 1.079 0.978 0.887 0.804 0.729 0.661 0.6 0.544 0.493 0.447 0.405 0.367 0.333 0.302 0.273 0.248 0.225 0.204

</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="7.45" PeakHeight="331.48" Num="5" zHalfNm="309.419" Error="2.561">
-94.862 -39.17 25.398 -9.37 1.387
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="104.863" Depth="0.154"/>
<TopsideChapman PeakHeight="331.48" PeakDensity="688616.6" PeakScaleHeight="15.893" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
