<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 08:20:00.000"
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="12.0">
<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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, 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" >
2026.10.20 (293) 08:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629310200820009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.130" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.022" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="339.140" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="339.140" 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="4.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="370.000" 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="0.749" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="303.965" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="253.417" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.486" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="71.422" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.623" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.481" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="75.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.830" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
339.140 339.515 339.931 340.393 340.909 341.491 342.151 342.906 343.778 344.796 346.002 347.451 349.227 351.453 354.324 358.171 365.000 370.000 385.000 415.000 507.094
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 66 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.953125 -1.953125 -1.953125 2.734375 -1.953125 -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 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="136">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.655 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 134.038 135.0 140.0 145.0 150.0 155.0 158.076 160.0 165.0 170.0 175.0 180.0 182.114 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 303.965 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.497 0.649 0.725 0.749 0.738 0.702 0.64 0.54 0.412 0.412 0.412 0.412 0.412 0.412 0.412 0.439 0.509 0.579 0.649 0.719 0.749 0.816 0.941 1.079 1.231 1.399 1.581 1.774 1.977 2.186 2.398 2.613 2.827 3.04 3.252 3.459 3.663 3.86 4.048 4.226 4.388 4.531 4.649 4.736 4.787 4.8 4.8 4.788 4.762 4.722 4.67 4.607 4.535 4.455 4.368 4.275 4.177 4.076 3.971 3.864 3.756 3.647 3.538 3.429 3.32 3.213 3.106 3.002 2.899 2.798 2.699 2.603 2.509 2.417 2.328 2.242 2.158 2.076 1.997 1.921 1.847 1.776 1.707 1.641 1.576 1.515 1.455 1.398 1.342 1.289 1.238 1.188 1.141 1.095 1.051 1.009 0.969 0.93 0.892 0.856 0.822 0.788 0.756 0.726 0.696 0.668 0.641 0.615 0.59 0.566 0.543 0.521 0.5 0.48 0.46 0.441 0.423 0.406 0.39 0.374 0.358 0.344 0.33 0.316 0.303 0.291 0.279 0.268 0.257 0.246 0.236 0.227 0.218 0.209 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.749" PeakHeight="110.0" Num="3" Error="0.0">
-25.049 6.547 -0.843
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.749" EndFrequency="4.8" PeakHeight="303.965" Num="5" zHalfNm="253.417" Error="2.133">
-117.928 -6.548 4.143 -2.049 0.531
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="72.114" Depth="0.337"/>
<TopsideChapman PeakHeight="303.965" PeakDensity="285856.1" PeakScaleHeight="37.481" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
