<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 22:10:00.000"
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="15.0">
<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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Trace overlaps while constructing baseline</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" >
2026.10.18 (291) 22:10:00</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">
FF202629110182210009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.870" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.515" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="440.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="440.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="440.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="432.739" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="397.952" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.395" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.757" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.845" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="23.630" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="87.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="49">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
485.000 485.000 484.857 484.714 484.571 484.429 484.286 484.143 484.000 483.857 483.714 483.571 483.429 483.286 483.143 483.000 482.857 482.714 482.571 482.429 482.286 590.000 585.000 576.667 568.333 560.000 555.000 555.000 560.000 565.000 570.000 575.000 566.000 557.000 548.000 539.000 530.000 521.000 512.000 503.000 494.000 485.000 476.000 467.000 458.000 449.000 440.000 468.379 527.298
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 0 0 0 0 0 0 63 0 0 63 0 0 0 60 0 0 0 0 51 51 51 0 54 60 54 54 0 54 0 54 0 0 60 0 54 60 0 0 0 0 0 0 0 57 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -2.734375 0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 1.953125 -1.171875 -1.953125 -1.171875 -2.734375 -2.734375 -2.734375 -1.953125 -1.171875 -1.171875 -1.171875 1.171875 -1.953125 -0.390625 2.734375 -2.734375 -1.953125 -2.734375 -1.953125 -0.390625 -0.390625 -1.171875 1.953125 1.953125 1.171875 1.953125 1.953125 -1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="134">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.488 145.0 150.0 155.0 160.0 165.0 170.0 174.975 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.463 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 432.739 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.229 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.224 0.248 0.271 0.295 0.319 0.342 0.354 0.411 0.48 0.544 0.608 0.677 0.753 0.837 0.93 1.033 1.144 1.263 1.387 1.514 1.642 1.771 1.899 2.027 2.153 2.278 2.402 2.526 2.649 2.771 2.893 3.015 3.137 3.26 3.384 3.508 3.633 3.76 3.889 4.02 4.153 4.289 4.428 4.571 4.719 4.872 5.032 5.201 5.381 5.577 5.796 6.057 6.8 6.794 6.741 6.641 6.501 6.328 6.131 5.914 5.683 5.444 5.2 4.954 4.71 4.469 4.233 4.004 3.782 3.569 3.364 3.168 2.982 2.804 2.636 2.476 2.325 2.182 2.048 1.921 1.801 1.689 1.583 1.483 1.39 1.302 1.22 1.143 1.07 1.003 0.939 0.879 0.823 0.771 0.722 0.676 0.633 0.592 0.554 0.519 0.486 0.455 0.426 0.399 0.373 0.349 0.327 0.306 0.286 0.268 0.251 0.235 0.22 0.206

</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="6.8" PeakHeight="432.739" Num="5" zHalfNm="397.952" Error="18.273">
-168.765 -104.021 68.721 -30.633 9.422
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.463" Depth="0.154"/>
<TopsideChapman PeakHeight="432.739" PeakDensity="573697.25" PeakScaleHeight="23.63" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
