<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-02 -033 02:20:00.000"
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="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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, 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" >
2026.02.02 (033) 02:20:00</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">
FF202603302020220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.991" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.776" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="7.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="397.000" 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="5.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="338.410" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="294.321" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.411" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="62.911" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.013" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.947" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="55.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.280" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="104">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 320.263 320.526 320.789 321.053 321.316 321.579 321.842 322.105 322.368 322.632 322.895 323.158 323.421 323.684 323.947 324.211 324.474 324.737 325.000 320.000 316.250 312.500 308.750 305.000 300.000 300.000 297.500 295.000 295.000 297.000 299.000 301.000 303.000 305.000 306.429 307.857 309.286 310.714 312.143 313.571 315.000 300.000 295.000 295.000 295.000 292.500 290.000 290.000 290.000 290.000 290.000 293.333 296.667 300.000 300.000 300.000 300.000 295.000 295.000 295.000 295.000 295.000 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 310.000 320.000 320.000 330.000 330.000 340.000 343.000 346.000 349.000 352.000 355.000 358.000 361.000 364.000 367.000 370.000 373.000 376.000 379.000 382.000 385.000 388.000 391.000 394.000 397.000 403.837 411.423 419.889 429.397 440.153 452.417
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 57 0 0 0 0 0 54 60 0 54 54 60 0 0 0 57 54 0 0 54 51 0 0 0 60 0 57 0 63 63 0 0 0 0 60 0 0 0 0 0 0 60 0 63 0 66 57 63 63 0 0 63 0 0 63 60 63 66 63 60 63 0 60 63 0 60 60 60 57 0 0 60 63 60 54 51 51 57 0 54 0 0 51 0 48 54 51 0 0 0 0 0 48 0 0 54 0 0 45 0 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 1.171875 1.171875 1.171875 1.171875 -0.390625 2.734375 1.171875 0.390625 0.390625 1.171875 0.390625 1.953125 1.171875 1.171875 0.390625 0.390625 1.953125 0.390625 1.953125 1.953125 0.390625 1.953125 1.171875 1.953125 0.390625 1.171875 1.953125 0.390625 0.390625 0.390625 1.171875 2.734375 1.171875 0.390625 0.390625 1.171875 1.171875 -1.171875 0.390625 0.390625 0.390625 1.171875 1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 1.953125 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 1.953125 -1.171875 -1.171875 1.171875 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -1.171875 -1.171875 -1.171875 1.171875 1.171875 1.171875 1.953125 1.171875 -1.953125 2.734375 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 -0.390625 -1.953125 1.953125 -0.390625 1.171875 2.734375 1.953125 -1.953125 -1.953125 -1.953125 2.734375 1.953125 2.734375 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="145">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.272 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.545 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.817 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 338.41 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0
</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 0.334 0.317 0.295 0.265 0.224 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.223 0.243 0.264 0.285 0.305 0.326 0.346 0.354 0.398 0.498 0.646 0.83 1.038 1.268 1.525 1.817 2.157 2.56 3.046 3.635 4.318 5.038 5.707 6.275 6.737 7.105 7.394 7.614 7.775 7.882 7.939 7.95 7.948 7.922 7.866 7.784 7.678 7.553 7.41 7.253 7.084 6.905 6.718 6.526 6.33 6.132 5.932 5.732 5.533 5.336 5.142 4.951 4.763 4.58 4.401 4.227 4.058 3.893 3.734 3.58 3.431 3.287 3.149 3.015 2.887 2.763 2.644 2.53 2.42 2.315 2.214 2.117 2.024 1.935 1.85 1.768 1.69 1.615 1.544 1.475 1.41 1.347 1.287 1.23 1.175 1.122 1.072 1.024 0.978 0.935 0.893 0.853 0.815 0.778 0.743 0.71 0.678 0.648 0.619 0.591 0.564 0.539 0.515 0.492 0.469 0.448 0.428 0.409 0.391 0.373 0.356 0.34 0.325 0.31 0.296 0.283 0.27 0.258 0.247 0.236 0.225 0.215 0.205

</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="7.95" PeakHeight="338.41" Num="5" zHalfNm="294.321" Error="6.139">
-123.574 15.155 -12.305 7.008 -2.877
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.817" Depth="0.154"/>
<TopsideChapman PeakHeight="338.41" PeakDensity="784150.1" PeakScaleHeight="33.947" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
