<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 19:20:00.000"
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="15.0">
<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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.10.18 (291) 19:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629110181920009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.697" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.013" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.900" 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="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.422" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="354.265" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.982" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.439" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.819" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.848" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.010" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="150.300" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.630" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="109">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 330.000 331.475 332.951 334.426 335.902 337.377 338.852 340.328 341.803 343.279 344.754 346.230 347.705 349.180 350.656 352.131 353.607 355.082 356.557 358.033 359.508 360.984 362.459 363.934 365.410 366.885 368.361 369.836 371.311 372.787 374.262 375.738 377.213 378.689 380.164 381.639 383.115 384.590 386.066 387.541 389.016 390.492 391.967 393.443 394.918 396.393 397.869 399.344 400.820 402.295 403.770 405.246 406.721 408.197 409.672 411.148 412.623 414.098 415.574 417.049 418.525 420.000 420.000 422.500 425.000 430.000 430.000 436.250 442.500 448.750 455.000 461.250 467.500 473.750 480.000 486.250 492.500 496.603 501.400 507.084 513.924 522.316 532.853 546.479 564.785 590.683 630.130
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 75 78 78 72 72 72 72 72 72 69 0 60 0 63 0 69 72 72 72 72 75 66 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 57 54 57 54 51 54 57 54 45
</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 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 -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 -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 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.656 90.0 95.0 100.0 105.0 110.0 115.0 115.976 120.0 121.951 125.0 127.927 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 354.265 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.229 1.626 2.097 2.344 2.422 2.335 2.297 2.297 2.297 2.361 2.422 2.495 2.677 2.868 3.065 3.266 3.47 3.676 3.885 4.095 4.307 4.521 4.736 4.953 5.173 5.394 5.618 5.844 6.073 6.304 6.537 6.773 7.012 7.252 7.495 7.739 7.985 8.231 8.478 8.725 8.97 9.213 9.453 9.688 9.918 10.139 10.351 10.551 10.737 10.908 11.061 11.194 11.305 11.392 11.454 11.49 11.5 11.5 11.493 11.476 11.449 11.413 11.367 11.314 11.253 11.184 11.108 11.026 10.938 10.844 10.745 10.642 10.534 10.422 10.306 10.187 10.065 9.94 9.814 9.685 9.554 9.422 9.289 9.154 9.019 8.884 8.748 8.611 8.475 8.339 8.203 8.067 7.932 7.798 7.664 7.532 7.4 7.269 7.14 7.011 6.884 6.759 6.634 6.511 6.39 6.27 6.151 6.035 5.919 5.806 5.694 5.583 5.474 5.367 5.262 5.158 5.056 4.955 4.857 4.76 4.664 4.57 4.478 4.387 4.298 4.211 4.125 4.041 3.958 3.877 3.797 3.719 3.642 3.567 3.493 3.421 3.35 3.28 3.212 3.145 3.079 3.015 2.952 2.89 2.829 2.77 2.712 2.655 2.599 2.544 2.49 2.438 2.386 2.336 2.287 2.238 2.191 2.144 2.099 2.054 2.011 1.968 1.926 1.885 1.845 1.806 1.768 1.73 1.693 1.657 1.622 1.587 1.553 1.52 1.488 1.456 1.425 1.395 1.365 1.336 1.307 1.279 1.252 1.225 1.199 1.173 1.148

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.422" PeakHeight="110.0" Num="3" Error="0.0">
-29.626 11.886 -2.604
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.422" EndFrequency="11.5" PeakHeight="354.265" Num="5" zHalfNm="257.982" Error="1.687">
-212.663 -21.512 8.727 -0.404 -0.486
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="17.927" Depth="0.125"/>
<TopsideChapman PeakHeight="354.265" PeakDensity="1640818.9" PeakScaleHeight="72.01" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
