<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 00:10:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.31 (304) 00:10:00</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">
FF202630410310010009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.933" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="13.931" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="419.040" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="383.041" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="351.919" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.529" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="47.253" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.114" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="24.319" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="63.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 376.000 377.000 378.000 379.000 380.000 377.500 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 376.429 377.857 379.286 380.714 382.143 383.571 385.000 387.500 390.000 417.500 445.000 437.500 430.000 427.500 425.000 425.000 420.000 415.000 413.333 411.667 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.000 410.649 411.546 412.866 415.000 419.040 429.593 527.956
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 66 63 63 0 0 66 0 0 69 0 0 0 0 57 54 66 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 60 0 57 0 57 0 60 63 0 0 0 0 57 0 0 0 0 0 66 0 60 63 66 0 60 60 0 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 2.734375 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.953125 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -1.171875 0.390625 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="120">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.27 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.54 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.81 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 383.041 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.315 0.291 0.259 0.214 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.232 0.253 0.274 0.295 0.317 0.338 0.354 0.366 0.427 0.501 0.58 0.66 0.739 0.818 0.896 0.975 1.055 1.137 1.222 1.309 1.399 1.493 1.592 1.695 1.805 1.921 2.045 2.178 2.321 2.476 2.645 2.832 3.037 3.265 3.517 3.793 4.083 4.363 4.592 4.727 4.75 4.747 4.714 4.65 4.558 4.444 4.313 4.168 4.014 3.853 3.688 3.522 3.355 3.191 3.029 2.871 2.718 2.571 2.428 2.292 2.162 2.037 1.919 1.806 1.7 1.599 1.503 1.413 1.328 1.247 1.171 1.1 1.033 0.97 0.91 0.854 0.802 0.752 0.706 0.662 0.621 0.583 0.547 0.513 0.481 0.451 0.423 0.397 0.372 0.349 0.328 0.307 0.288 0.27 0.253 0.238 0.223 0.209

</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="4.75" PeakHeight="383.041" Num="5" zHalfNm="351.919" Error="6.902">
-128.821 -50.973 14.915 3.593 -2.945
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.81" Depth="0.154"/>
<TopsideChapman PeakHeight="383.041" PeakDensity="279931.75" PeakScaleHeight="24.319" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
