<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 20:20:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o 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" >
2026.10.25 (298) 20:20:00</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">
FF202629810252020009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.974" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="36.283" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="11.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="407.209" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.635" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="325.708" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="281.176" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.417" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="64.347" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="28.185" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.595" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="83.360" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="176">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.750 271.500 272.250 273.000 273.750 274.500 275.250 276.000 276.750 277.500 278.250 279.000 279.750 280.500 281.250 282.000 282.750 283.500 284.250 285.000 285.000 285.000 286.129 287.258 288.387 289.516 290.645 291.774 292.903 294.032 295.161 296.290 297.419 298.548 299.677 300.806 301.935 303.065 304.194 305.323 306.452 307.581 308.710 309.839 310.968 312.097 313.226 314.355 315.484 316.613 317.742 318.871 320.000 320.000 321.000 322.000 323.000 324.000 325.000 325.000 325.556 326.111 326.667 327.222 327.778 328.333 328.889 329.444 330.000 330.556 331.111 331.667 332.222 332.778 333.333 333.889 334.444 335.000 335.556 336.111 336.667 337.222 337.778 338.333 338.889 339.444 340.000 340.556 341.111 341.667 342.222 342.778 343.333 343.889 344.444 345.000 345.556 346.111 346.667 347.222 347.778 348.333 348.889 349.444 350.000 350.556 351.111 351.667 352.222 352.778 353.333 353.889 354.444 355.000 355.556 356.111 356.667 357.222 357.778 358.333 358.889 359.444 360.000 360.556 361.111 361.667 362.222 362.778 363.333 363.889 364.444 365.000 365.625 366.250 366.875 367.500 368.125 368.750 369.375 370.000 371.765 373.529 375.294 377.059 378.824 380.588 382.353 384.118 385.882 387.647 389.412 391.176 392.941 394.706 396.471 398.235 400.000 395.000 400.000 400.000 405.000 407.209 409.729 412.633 416.014 420.000 424.771 430.583 437.819
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 0 66 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 0 51 0 66 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="152">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.88 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.365 125.0 130.0 130.731 135.0 140.0 141.096 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 325.708 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.21 1.094 1.416 1.582 1.635 1.603 1.503 1.493 1.493 1.493 1.493 1.551 1.62 1.635 1.779 1.949 2.113 2.275 2.438 2.603 2.772 2.946 3.125 3.311 3.503 3.704 3.912 4.129 4.357 4.594 4.842 5.102 5.375 5.661 5.961 6.276 6.607 6.954 7.319 7.702 8.104 8.525 8.965 9.424 9.899 10.385 10.872 11.34 11.755 12.063 12.198 12.2 12.181 12.114 12.004 11.855 11.673 11.462 11.226 10.971 10.698 10.413 10.118 9.816 9.509 9.199 8.889 8.58 8.274 7.972 7.674 7.382 7.096 6.817 6.545 6.28 6.024 5.776 5.535 5.303 5.079 4.863 4.655 4.454 4.262 4.077 3.899 3.728 3.564 3.407 3.257 3.112 2.974 2.842 2.715 2.594 2.478 2.367 2.261 2.159 2.062 1.969 1.881 1.796 1.715 1.637 1.564 1.493 1.425 1.361 1.299 1.241 1.184 1.131 1.079 1.031 0.984 0.939 0.897 0.856 0.817 0.78 0.745 0.711 0.679 0.648 0.618 0.59 0.563 0.538 0.513 0.49 0.468 0.447 0.426 0.407 0.388 0.371 0.354 0.338 0.323 0.308 0.294 0.281 0.268 0.256 0.244 0.233 0.222 0.212 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.635" PeakHeight="110.0" Num="3" Error="0.0">
-28.422 10.265 -1.963
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.635" EndFrequency="12.2" PeakHeight="325.708" Num="5" zHalfNm="281.176" Error="2.103">
-141.974 -55.435 11.735 0.611 0.451
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="31.096" Depth="0.142"/>
<TopsideChapman PeakHeight="325.708" PeakDensity="1846650.1" PeakScaleHeight="33.595" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
