<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 21:20:00.000"
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="14.0">
<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: 75% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.10.25 (298) 21:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629810252120009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.818" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.819" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.503" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="372.911" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="321.370" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.970" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="76.283" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.697" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.573" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.650" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="167">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 305.000 306.000 307.000 308.000 309.000 310.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 340.800 341.600 342.400 343.200 344.000 344.800 345.600 346.400 347.200 348.000 348.800 349.600 350.400 351.200 352.000 352.800 353.600 354.400 355.200 356.000 356.800 357.600 358.400 359.200 360.000 360.800 361.600 362.400 363.200 364.000 364.800 365.600 366.400 367.200 368.000 368.800 369.600 370.400 371.200 372.000 372.800 373.600 374.400 375.200 376.000 376.800 377.600 378.400 379.200 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 392.500 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 400.000 402.000 404.000 406.000 408.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 433.817 438.002 442.610 447.709 453.383 459.734 466.891 475.019 484.327 495.095 507.694
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 69 69 66 0 0 75 75 75 78 78 75 72 75 0 0 78 69 0 0 0 0 0 75 0 75 0 0 0 0 0 0 63 0 63 0 69 0 0 0 66 0 51 0 0 0 0 0 66 0 0 0 0 0 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="175">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.624 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.888 140.0 145.0 150.0 155.0 160.0 165.0 165.775 170.0 175.0 180.0 185.0 190.0 193.663 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.911 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.333 0.436 0.487 0.503 0.496 0.476 0.439 0.382 0.292 0.212 0.212 0.212 0.212 0.212 0.212 0.212 0.212 0.256 0.308 0.36 0.413 0.465 0.503 0.535 0.659 0.793 0.938 1.099 1.275 1.468 1.68 1.909 2.157 2.424 2.708 3.011 3.331 3.669 4.023 4.394 4.781 5.183 5.6 6.032 6.476 6.932 7.398 7.873 8.353 8.835 9.315 9.786 10.241 10.67 11.062 11.404 11.68 11.877 11.983 12.0 11.997 11.962 11.893 11.792 11.663 11.508 11.332 11.137 10.926 10.7 10.464 10.218 9.965 9.706 9.444 9.18 8.914 8.649 8.385 8.123 7.863 7.608 7.356 7.109 6.866 6.629 6.398 6.172 5.952 5.738 5.53 5.328 5.132 4.943 4.759 4.581 4.409 4.242 4.081 3.926 3.776 3.632 3.492 3.358 3.228 3.103 2.983 2.867 2.756 2.648 2.545 2.446 2.35 2.258 2.169 2.084 2.002 1.924 1.848 1.775 1.705 1.638 1.574 1.511 1.452 1.394 1.339 1.286 1.236 1.187 1.14 1.095 1.051 1.01 0.97 0.931 0.894 0.859 0.825 0.792 0.761 0.731 0.702 0.674 0.647 0.621 0.597 0.573 0.55 0.529 0.508 0.487 0.468 0.45 0.432 0.415 0.398 0.382 0.367 0.353 0.339 0.325 0.312 0.3 0.288 0.277 0.266 0.255 0.245 0.235 0.226 0.217 0.208 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.503" PeakHeight="110.0" Num="3" Error="0.0">
-22.353 4.38 -0.403
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.503" EndFrequency="12.0" PeakHeight="372.911" Num="5" zHalfNm="321.37" Error="1.392">
-170.171 -17.675 10.651 -2.827 0.774
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="83.663" Depth="0.291"/>
<TopsideChapman PeakHeight="372.911" PeakDensity="1786600.5" PeakScaleHeight="38.573" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
