<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 08:40:00.000"
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="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.02.10 (041) 08:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202604102100840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.336" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.177" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="4.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="306.079" 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="0.615" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="281.046" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="229.831" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.661" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="72.679" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="4.165" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.355" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="60.320" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="45">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 235.000 236.667 238.333 240.000 241.667 243.333 245.000 245.000 245.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 260.000 260.000 260.000 265.000 265.000 265.000 270.000 270.000 275.000 275.000 276.575 278.332 280.306 282.539 285.086 288.016 291.426 295.441 300.241 306.079 313.332 322.588 334.807 351.685 376.512 416.635 492.484
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 66 0 0 0 0 0 63 0 72 60 0 69 72 63 66 72 57 66 69 60 66 69 63 69 60 66 69 66 66 69 63 0 0 0 69 69 60 0 0 0 57 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 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 0.390625 -2.734375 -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="134">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.046 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.315 140.0 145.0 150.0 155.0 160.0 162.63 165.0 170.0 175.0 180.0 185.0 188.945 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 281.046 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.408 0.533 0.595 0.615 0.606 0.58 0.532 0.458 0.337 0.29 0.29 0.29 0.29 0.29 0.29 0.29 0.319 0.381 0.443 0.505 0.566 0.615 0.641 0.783 0.964 1.196 1.497 1.889 2.361 2.832 3.229 3.545 3.794 3.992 4.151 4.277 4.376 4.45 4.503 4.536 4.55 4.55 4.546 4.528 4.498 4.457 4.407 4.347 4.28 4.206 4.126 4.042 3.953 3.861 3.767 3.671 3.573 3.475 3.376 3.277 3.179 3.082 2.985 2.89 2.797 2.705 2.614 2.526 2.44 2.355 2.273 2.193 2.115 2.04 1.966 1.895 1.826 1.759 1.695 1.632 1.572 1.513 1.456 1.402 1.349 1.298 1.249 1.202 1.156 1.112 1.07 1.029 0.99 0.952 0.915 0.88 0.846 0.814 0.783 0.752 0.723 0.696 0.669 0.643 0.618 0.594 0.571 0.549 0.528 0.507 0.488 0.469 0.451 0.433 0.416 0.4 0.385 0.37 0.355 0.341 0.328 0.315 0.303 0.291 0.28 0.269 0.259 0.249 0.239 0.23 0.221 0.212 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.615" PeakHeight="110.0" Num="3" Error="0.0">
-23.838 5.495 -0.611
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.615" EndFrequency="4.55" PeakHeight="281.046" Num="5" zHalfNm="229.831" Error="2.142">
-109.87 28.226 -13.291 3.347 -0.513
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="78.945" Depth="0.325"/>
<TopsideChapman PeakHeight="281.046" PeakDensity="256854.84" PeakScaleHeight="39.355" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
