<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-26 -299 19:40:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.10.26 (299) 19:40:00</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">
FF202629910261940009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.526" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.159" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.150" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="507.420" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.209" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="382.884" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="279.412" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.471" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="142.210" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.790" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="75.129" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="163.260" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="127">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 280.000 282.500 285.000 287.500 290.000 290.000 290.000 290.000 290.000 290.000 290.000 292.500 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 302.141 304.282 306.422 308.563 310.704 312.845 314.986 317.126 319.267 321.408 323.549 325.690 327.830 329.971 332.112 334.253 336.394 338.535 340.675 342.816 344.957 347.098 349.239 351.379 353.520 355.661 357.802 359.943 362.083 364.224 366.365 368.506 370.647 372.787 374.928 377.069 379.210 381.351 383.491 385.632 387.773 389.914 392.055 394.195 396.336 398.477 400.618 402.759 404.900 407.040 409.181 411.322 413.463 415.604 417.744 419.885 422.026 424.167 426.308 428.448 430.589 432.730 434.871 437.012 439.152 441.293 443.434 445.575 447.716 449.856 451.997 454.138 456.279 458.420 460.560 462.701 464.842 466.983 469.124 471.265 473.405 475.546 477.687 479.828 481.969 484.109 486.250 488.391 490.532 492.673 494.813 498.647 502.832 507.420 515.000 520.000 525.000 530.000 540.000 550.000 560.000 570.000 585.000 600.000 620.000 644.018
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 60 0 0 0 0 0 54 0 63 69 66 0 69 66 60 54 63 69 66 66 0 0 0 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 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
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 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 -1.171875 -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 1.171875 1.171875 -1.953125 1.953125 2.734375 2.734375 -1.171875 2.734375 -1.953125 2.734375 1.171875 -0.390625 2.734375 0.390625 -2.734375 1.953125 1.953125 -0.390625 1.171875 -0.390625 1.171875 -1.171875 -1.953125 1.171875 -1.171875 2.734375 1.953125 0.390625 -1.171875 1.171875 2.734375 1.953125 1.953125 -2.734375 1.953125 1.953125 -1.171875 -0.390625 -1.953125 1.171875 -1.953125 1.171875 1.171875 -0.390625 -2.734375 -1.171875 2.734375 -1.953125 -2.734375 1.953125 2.734375 2.734375 0.390625 -1.171875 0.390625 0.390625 1.953125 1.171875 2.734375 -0.390625 -2.734375 1.953125 2.734375 1.953125 1.171875 1.171875 -0.390625 -0.390625 -1.953125 1.171875 1.953125 1.953125 2.734375 2.734375 1.171875 2.734375 -2.734375 2.734375 -0.390625 2.734375 1.171875 -0.390625 -0.390625 -0.390625 -1.953125 2.734375 -1.953125 -2.734375 1.171875 -1.953125 2.734375
</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" >
89.706 90.0 95.0 100.0 105.0 110.0 115.0 117.081 120.0 124.161 125.0 130.0 131.242 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.884 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.225 1.482 1.913 2.138 2.209 2.146 2.081 2.081 2.081 2.096 2.187 2.209 2.326 2.476 2.623 2.77 2.92 3.073 3.231 3.393 3.56 3.731 3.908 4.089 4.275 4.464 4.656 4.851 5.048 5.246 5.445 5.645 5.845 6.045 6.245 6.444 6.643 6.841 7.038 7.234 7.43 7.624 7.818 8.011 8.202 8.393 8.582 8.77 8.957 9.141 9.323 9.502 9.677 9.847 10.011 10.166 10.311 10.441 10.554 10.645 10.71 10.745 10.75 10.749 10.741 10.724 10.698 10.665 10.624 10.576 10.521 10.459 10.392 10.319 10.241 10.158 10.071 9.979 9.884 9.785 9.682 9.577 9.469 9.359 9.247 9.132 9.016 8.899 8.78 8.661 8.54 8.419 8.297 8.175 8.053 7.931 7.809 7.687 7.566 7.445 7.324 7.204 7.085 6.967 6.849 6.733 6.617 6.503 6.389 6.277 6.166 6.056 5.948 5.841 5.735 5.63 5.527 5.425 5.325 5.226 5.128 5.032 4.937 4.844 4.752 4.662 4.573 4.485 4.399 4.314 4.231 4.149 4.068 3.989 3.911 3.835 3.76 3.686 3.613 3.542 3.472 3.403 3.336 3.27 3.205 3.141 3.078 3.017 2.956 2.897 2.839 2.782 2.726 2.672 2.618 2.565 2.513 2.463 2.413 2.364 2.316 2.27 2.224 2.179 2.134 2.091 2.049 2.007 1.966 1.926 1.887 1.849 1.811 1.774 1.738 1.703 1.668 1.634 1.6 1.568 1.536 1.504 1.474 1.443 1.414 1.385 1.357

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.209" PeakHeight="110.0" Num="3" Error="0.0">
-29.365 11.522 -2.451
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.209" EndFrequency="10.75" PeakHeight="382.884" Num="5" zHalfNm="279.412" Error="2.526">
-227.257 -38.22 18.641 -7.01 2.204
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="21.242" Depth="0.128"/>
<TopsideChapman PeakHeight="382.884" PeakDensity="1433777.9" PeakScaleHeight="75.129" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
