<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 15:10:00.000"
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: F2x cusp not found, 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) 15:10:00</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">
FF202629710241510009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.434" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.164" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="10.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="10.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="540.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="540.000" 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="10.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="540.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.385" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="10.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="10.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.358" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="344.315" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.382" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.920" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="165.035" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.636" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.760" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="185.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.720" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="12">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
540.000 547.500 555.000 557.500 560.000 570.000 575.000 580.000 590.000 600.000 610.000 622.717
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 42 0 51 48 48 48 45 0 42 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 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" >
89.485 90.0 95.0 100.0 105.0 110.0 111.572 113.144 114.716 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 344.315 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.277 2.929 3.275 3.385 3.262 3.262 3.385 3.396 3.583 3.759 3.932 4.107 4.284 4.467 4.656 4.852 5.054 5.262 5.475 5.691 5.91 6.13 6.348 6.564 6.777 6.986 7.191 7.391 7.587 7.777 7.964 8.145 8.323 8.496 8.665 8.83 8.991 9.149 9.302 9.451 9.596 9.737 9.872 10.002 10.126 10.243 10.351 10.45 10.538 10.613 10.673 10.717 10.743 10.75 10.75 10.746 10.735 10.719 10.697 10.669 10.636 10.598 10.555 10.508 10.456 10.399 10.339 10.275 10.208 10.137 10.063 9.987 9.907 9.825 9.741 9.654 9.566 9.476 9.384 9.29 9.195 9.099 9.001 8.903 8.804 8.704 8.603 8.502 8.401 8.299 8.197 8.095 7.992 7.89 7.788 7.686 7.584 7.483 7.382 7.281 7.181 7.081 6.982 6.884 6.786 6.689 6.592 6.497 6.402 6.308 6.214 6.122 6.03 5.94 5.85 5.761 5.673 5.586 5.5 5.415 5.331 5.248 5.166 5.085 5.005 4.926 4.848 4.771 4.695 4.62 4.546 4.473 4.401 4.33 4.26 4.191 4.122 4.055 3.989 3.924 3.86 3.796 3.734 3.672 3.612 3.552 3.493 3.435 3.378 3.322 3.267 3.212 3.159 3.106 3.054 3.003 2.953 2.903 2.854 2.806 2.759 2.713 2.667 2.622 2.578 2.534 2.491 2.449 2.408 2.367 2.327 2.287 2.248 2.21 2.173 2.136 2.099 2.064 2.029 1.994 1.96 1.927 1.894 1.861 1.83 1.798

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.385" PeakHeight="110.0" Num="3" Error="0.0">
-30.496 13.146 -3.165
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.385" EndFrequency="10.75" PeakHeight="344.315" Num="5" zHalfNm="220.382" Error="5.913">
-219.005 -18.202 11.872 -6.698 2.434
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.716" Depth="0.123"/>
<TopsideChapman PeakHeight="344.315" PeakDensity="1433777.9" PeakScaleHeight="89.76" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
