<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 20:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.03.02 (061) 20:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606103022050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.930" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.553" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="422.226" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.585" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="332.964" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="283.370" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.521" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.648" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.393" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.788" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="87.000" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="178">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 267.500 270.000 265.000 265.000 265.000 265.000 265.000 270.000 265.000 267.500 270.000 270.000 270.000 270.000 270.000 270.000 275.000 276.667 278.333 280.000 280.000 280.000 280.000 281.000 282.000 283.000 284.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 290.000 291.000 292.000 293.000 294.000 295.000 300.000 301.000 302.000 303.000 304.000 305.000 305.000 307.000 309.000 311.000 313.000 315.000 315.000 315.000 315.000 315.000 316.250 317.500 318.750 320.000 322.500 325.000 327.500 330.000 330.833 331.667 332.500 333.333 334.167 335.000 335.000 335.000 335.000 337.500 340.000 340.000 342.000 344.000 346.000 348.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 376.667 378.333 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 387.000 389.000 391.000 393.000 395.000 400.000 397.500 395.000 395.000 397.500 400.000 405.000 405.000 405.833 406.667 407.500 408.975 410.605 412.416 414.438 416.711 419.286 422.226 425.616 429.566 434.229 439.816 446.632
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 57 57 0 0 0 0 0 0 0 0 69 69 0 0 0 0 69 0 69 66 66 63 60 0 63 60 0 57 0 51 0 0 0 66 0 66 66 0 0 63 0 63 66 57 0 0 51 69 69 66 0 69 0 0 0 0 66 69 0 0 0 0 54 0 0 69 0 0 63 0 69 0 69 0 66 0 69 0 63 48 51 0 63 0 48 0 60 66 66 69 57 63 63 0 0 63 0 51 0 63 66 0 57 0 66 48 72 63 63 69 0 54 63 0 0 66 69 69 69 66 66 0 69 72 66 0 69 60 57 69 0 63 0 0 69 72 0 72 69 0 0 72 75 69 0 69 69 66 0 0 0 0 0 66 48 0 60 0 0 57 51 54 0 0 0 0 45 66 63 63 45 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.9 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.69 125.0 130.0 131.381 135.0 140.0 142.071 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 332.964 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.209 1.06 1.373 1.534 1.585 1.555 1.46 1.442 1.442 1.442 1.442 1.49 1.557 1.585 1.649 1.759 1.873 1.991 2.116 2.247 2.388 2.537 2.697 2.869 3.053 3.25 3.461 3.686 3.924 4.176 4.439 4.714 4.999 5.293 5.594 5.902 6.216 6.535 6.86 7.19 7.524 7.864 8.21 8.561 8.92 9.286 9.659 10.039 10.424 10.804 11.154 11.402 11.45 11.446 11.409 11.333 11.222 11.082 10.914 10.724 10.514 10.288 10.048 9.797 9.538 9.273 9.003 8.731 8.458 8.185 7.914 7.646 7.38 7.12 6.864 6.613 6.368 6.129 5.896 5.67 5.451 5.238 5.032 4.832 4.639 4.453 4.273 4.1 3.933 3.772 3.617 3.468 3.325 3.187 3.055 2.928 2.805 2.688 2.575 2.467 2.364 2.264 2.169 2.077 1.99 1.906 1.825 1.748 1.674 1.603 1.535 1.469 1.407 1.347 1.29 1.235 1.183 1.132 1.084 1.038 0.994 0.951 0.911 0.872 0.835 0.799 0.765 0.732 0.701 0.671 0.643 0.615 0.589 0.564 0.54 0.517 0.495 0.474 0.453 0.434 0.415 0.398 0.381 0.364 0.349 0.334 0.32 0.306 0.293 0.28 0.269 0.257 0.246 0.236 0.225 0.216 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.585" PeakHeight="110.0" Num="3" Error="0.0">
-28.314 10.128 -1.914
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.585" EndFrequency="11.45" PeakHeight="332.964" Num="5" zHalfNm="283.37" Error="3.171">
-144.584 -56.512 15.11 -7.143 2.236
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="32.071" Depth="0.143"/>
<TopsideChapman PeakHeight="332.964" PeakDensity="1626581.9" PeakScaleHeight="35.788" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
