<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 21:00:00.000"
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="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: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.10.24 (297) 21:00:00</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">
FF202629710242100009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.545" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.087" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.550" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.805" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="397.953" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="328.014" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.165" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="102.426" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.080" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="51.246" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="110.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="115">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 327.500 330.000 330.000 330.000 335.000 336.429 337.857 339.286 340.714 342.143 343.571 345.000 346.429 347.857 349.286 350.714 352.143 353.571 355.000 355.000 357.500 360.000 362.500 365.000 370.000 370.000 370.000 370.000 370.000 372.500 375.000 375.000 380.000 380.000 380.000 385.000 386.806 388.611 390.417 392.222 394.028 395.833 397.639 399.444 401.250 403.056 404.861 406.667 408.472 410.278 412.083 413.889 415.694 417.500 419.306 421.111 422.917 424.722 426.528 428.333 430.139 431.944 433.750 435.556 437.361 439.167 440.972 442.778 444.583 446.389 448.194 450.000 450.000 452.500 455.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 480.000 480.000 485.000 487.500 490.000 495.000 498.333 501.667 505.000 507.500 510.000 515.000 520.000 525.000 530.000 530.000 536.161 543.263 551.541 561.312
</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 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 57 63 51 57 63 51 60 66 63 60 60 54 0 51 48 57 57 57 0 57 54 0 0 45 0 57 54 54 57 60 63 63 63 63 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 2.734375 0.390625 2.734375 -1.953125 0.390625 -1.953125 2.734375 -0.390625 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -1.953125 -1.953125 -1.953125 1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 2.734375 -2.734375 -0.390625 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.537 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.824 135.0 140.0 145.0 150.0 155.0 155.648 160.0 165.0 170.0 175.0 178.472 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 397.953 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.535 0.698 0.779 0.805 0.792 0.753 0.683 0.572 0.478 0.478 0.478 0.478 0.478 0.478 0.478 0.54 0.612 0.684 0.755 0.805 0.846 0.97 1.089 1.213 1.343 1.483 1.633 1.795 1.97 2.157 2.357 2.567 2.787 3.015 3.25 3.49 3.734 3.982 4.232 4.484 4.739 4.994 5.251 5.51 5.769 6.03 6.292 6.556 6.821 7.087 7.354 7.622 7.89 8.159 8.426 8.691 8.952 9.205 9.448 9.675 9.877 10.046 10.17 10.239 10.25 10.248 10.232 10.197 10.147 10.082 10.002 9.911 9.807 9.694 9.571 9.439 9.3 9.155 9.004 8.849 8.689 8.526 8.36 8.193 8.024 7.854 7.683 7.512 7.342 7.172 7.003 6.836 6.67 6.505 6.343 6.183 6.025 5.87 5.717 5.567 5.419 5.274 5.132 4.993 4.857 4.724 4.594 4.466 4.342 4.22 4.102 3.986 3.873 3.763 3.655 3.551 3.449 3.35 3.253 3.159 3.067 2.978 2.891 2.807 2.725 2.645 2.568 2.492 2.419 2.348 2.279 2.212 2.146 2.083 2.021 1.961 1.903 1.847 1.792 1.739 1.687 1.637 1.588 1.541 1.495 1.45 1.407 1.365 1.324 1.285 1.247 1.209 1.173 1.138 1.104 1.071 1.039 1.008 0.978 0.949 0.92 0.893 0.866 0.84 0.815 0.79 0.767 0.744 0.721 0.7 0.679 0.658 0.639 0.62 0.601 0.583 0.565 0.548 0.532 0.516 0.501 0.486 0.471 0.457 0.443 0.43

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.805" PeakHeight="110.0" Num="3" Error="0.0">
-25.441 6.907 -0.929
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.805" EndFrequency="10.25" PeakHeight="397.953" Num="5" zHalfNm="328.014" Error="4.102">
-203.739 -29.855 19.959 -8.839 2.993
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="68.472" Depth="0.327"/>
<TopsideChapman PeakHeight="397.953" PeakDensity="1303505.0" PeakScaleHeight="51.246" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
