<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 20:00:00.000"
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="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" >
2026.10.17 (290) 20:00:00</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">
FF202629010172000009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.716" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.179" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="450.000" 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="1.975" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="355.904" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.437" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.465" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="113.173" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.162" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.209" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="132.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.370" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 327.500 330.000 332.500 335.000 335.000 335.000 335.000 335.000 335.000 335.000 336.358 337.716 339.074 340.432 341.790 343.148 344.506 345.864 347.222 348.580 349.938 351.296 352.654 354.012 355.370 356.728 358.086 359.444 360.802 362.160 363.519 364.877 366.235 367.593 368.951 370.309 371.667 373.025 374.383 375.741 377.099 378.457 379.815 381.173 382.531 383.889 385.247 386.605 387.963 389.321 390.679 392.037 393.395 394.753 396.111 397.469 398.827 400.185 401.543 402.901 404.259 405.617 406.975 408.333 409.691 411.049 412.407 413.765 415.123 416.481 417.840 419.198 420.556 421.914 423.272 424.630 425.988 427.346 428.704 430.062 431.420 432.778 434.136 435.494 436.852 438.210 439.568 440.926 442.284 443.642 445.000 450.000 450.000 455.000 458.970 463.460 468.581 474.475 481.331 489.407 499.059 510.798 525.385 543.998 568.569 602.508
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
81 81 81 78 78 0 0 0 0 0 0 0 66 72 78 75 78 75 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 54 57 60 60 60 60 60 60 63 63 60 0 57 0 0 0
</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 -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 -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 -2.734375 -0.390625 2.734375 -0.390625 1.171875 0.390625 1.953125 -0.390625 -1.171875 -0.390625 -2.734375 -0.390625 -2.734375 -0.390625 -0.390625 2.734375 1.171875 -0.390625 -0.390625 -2.734375 2.734375 1.953125 1.953125 1.953125 2.734375 1.171875 -2.734375 2.734375 2.734375 1.953125 2.734375 1.171875 -0.390625 -1.953125 1.171875 -0.390625 -2.734375 1.953125 -1.171875 0.390625 0.390625 -1.953125 0.390625 -1.171875 1.171875 -1.953125 0.390625 -1.171875 -1.171875 0.390625 -1.953125 -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 -1.953125
</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" >
89.767 90.0 95.0 100.0 105.0 110.0 115.0 118.349 120.0 125.0 126.698 130.0 135.0 135.047 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 355.904 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.324 1.71 1.911 1.975 1.928 1.842 1.842 1.842 1.842 1.895 1.974 1.975 2.147 2.33 2.522 2.721 2.926 3.135 3.348 3.565 3.784 4.006 4.23 4.456 4.684 4.914 5.146 5.38 5.615 5.853 6.093 6.335 6.58 6.826 7.075 7.327 7.581 7.837 8.095 8.356 8.619 8.884 9.15 9.418 9.685 9.952 10.216 10.476 10.729 10.972 11.199 11.404 11.581 11.719 11.811 11.849 11.85 11.845 11.824 11.788 11.738 11.675 11.6 11.513 11.416 11.31 11.194 11.071 10.941 10.803 10.66 10.512 10.36 10.203 10.043 9.88 9.715 9.548 9.379 9.209 9.039 8.868 8.697 8.526 8.356 8.187 8.019 7.852 7.686 7.522 7.359 7.199 7.04 6.883 6.729 6.576 6.426 6.279 6.133 5.99 5.85 5.712 5.577 5.444 5.314 5.186 5.061 4.938 4.818 4.701 4.585 4.473 4.362 4.254 4.149 4.046 3.945 3.846 3.75 3.656 3.564 3.474 3.387 3.301 3.218 3.136 3.057 2.979 2.903 2.829 2.757 2.687 2.618 2.551 2.486 2.422 2.36 2.299 2.24 2.182 2.126 2.072 2.018 1.966 1.915 1.866 1.818 1.771 1.725 1.681 1.637 1.595 1.554 1.513 1.474 1.436 1.399 1.362 1.327 1.293 1.259 1.227 1.195 1.164 1.134 1.104 1.075 1.048 1.02 0.994 0.968 0.943 0.918 0.894 0.871 0.849 0.827 0.805 0.784 0.764 0.744 0.724 0.706 0.687 0.669 0.652

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.975" PeakHeight="110.0" Num="3" Error="0.0">
-29.03 11.065 -2.268
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.975" EndFrequency="11.85" PeakHeight="355.904" Num="5" zHalfNm="275.437" Error="1.57">
-197.494 -37.948 18.54 -4.238 0.283
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.047" Depth="0.133"/>
<TopsideChapman PeakHeight="355.904" PeakDensity="1742214.6" PeakScaleHeight="59.209" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
