<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-10 -041 09:00:00.000"
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) 09:00:00</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">
FF202604102100900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.225" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.577" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="5.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="320.000" 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="0.972" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="286.462" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="226.212" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="85.918" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.262" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.812" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.990" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.880" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="59">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 252.500 255.000 252.500 250.000 250.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 285.000 285.000 285.000 290.000 290.000 295.000 295.000 300.000 300.000 305.000 310.000 310.000 310.000 320.000 320.000 330.000 335.000 340.000 349.245 361.450 378.308 403.108 443.189 518.966
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 66 66 0 66 66 66 66 69 0 57 0 69 69 72 60 63 66 0 0 69 0 0 0 57 60 63 51 0 0 63 72 69 72 63 69 72 66 69 63 69 66 69 66 63 69 69 66 66 63 63 63 66 66 63 60 54 48
</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 2.734375 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 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 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125 -1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="158">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.301 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.608 130.0 135.0 140.0 145.0 145.217 150.0 155.0 160.0 162.825 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 286.462 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.647 0.842 0.941 0.972 0.956 0.905 0.815 0.748 0.748 0.748 0.748 0.748 0.748 0.809 0.872 0.936 0.972 1.031 1.188 1.367 1.557 1.754 1.96 2.176 2.405 2.65 2.913 3.193 3.486 3.783 4.069 4.333 4.567 4.768 4.937 5.078 5.193 5.284 5.354 5.404 5.435 5.449 5.45 5.447 5.433 5.408 5.374 5.33 5.278 5.218 5.152 5.08 5.003 4.921 4.836 4.746 4.655 4.56 4.464 4.367 4.268 4.169 4.07 3.971 3.872 3.773 3.675 3.578 3.482 3.387 3.294 3.202 3.112 3.023 2.936 2.851 2.767 2.685 2.606 2.528 2.451 2.377 2.305 2.234 2.165 2.098 2.033 1.97 1.909 1.849 1.791 1.734 1.679 1.626 1.574 1.524 1.476 1.428 1.383 1.338 1.295 1.254 1.213 1.174 1.136 1.1 1.064 1.03 0.996 0.964 0.933 0.902 0.873 0.845 0.817 0.79 0.765 0.74 0.716 0.692 0.67 0.648 0.627 0.606 0.586 0.567 0.549 0.531 0.513 0.497 0.48 0.465 0.449 0.435 0.42 0.407 0.393 0.38 0.368 0.356 0.344 0.333 0.322 0.311 0.301 0.291 0.282 0.273 0.264 0.255 0.247 0.239 0.231 0.223 0.216 0.209 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.972" PeakHeight="110.0" Num="3" Error="0.0">
-26.379 7.866 -1.186
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.972" EndFrequency="5.45" PeakHeight="286.462" Num="5" zHalfNm="226.212" Error="2.214">
-133.229 15.591 -9.237 4.646 -1.408
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="52.825" Depth="0.224"/>
<TopsideChapman PeakHeight="286.462" PeakDensity="368517.38" PeakScaleHeight="46.812" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
