<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 16:50:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.10.23 (296) 16:50:00</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">
FF202629610231650009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.701" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.492" 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="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="480.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="480.000" 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="10.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="492.071" 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="3.216" 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="4.279" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="292.825" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="198.744" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.727" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.775" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="40.482" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.030" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="139.050" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.820" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
480.000 480.000 482.500 484.668 487.664 492.071 499.197 512.678
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 42 0 42 0 42
</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
</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" >
89.51 90.0 95.0 100.0 105.0 110.0 112.277 114.554 115.0 116.831 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 292.825 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.163 2.783 3.111 3.216 3.094 3.094 3.118 3.216 3.365 3.592 3.817 4.047 4.285 4.532 4.789 5.055 5.328 5.607 5.89 6.172 6.452 6.729 7.0 7.266 7.524 7.776 8.021 8.258 8.488 8.71 8.925 9.132 9.33 9.519 9.698 9.865 10.019 10.158 10.279 10.381 10.461 10.517 10.546 10.55 10.549 10.539 10.519 10.49 10.451 10.404 10.348 10.285 10.215 10.139 10.056 9.968 9.874 9.775 9.672 9.565 9.455 9.341 9.224 9.105 8.983 8.859 8.734 8.607 8.479 8.35 8.221 8.091 7.96 7.83 7.7 7.569 7.439 7.31 7.181 7.053 6.926 6.8 6.675 6.551 6.428 6.307 6.187 6.068 5.95 5.834 5.72 5.607 5.496 5.386 5.278 5.172 5.067 4.964 4.862 4.762 4.664 4.567 4.473 4.379 4.288 4.198 4.109 4.023 3.938 3.854 3.772 3.692 3.613 3.536 3.46 3.385 3.313 3.241 3.171 3.103 3.035 2.969 2.905 2.842 2.78 2.719 2.66 2.602 2.545 2.489 2.434 2.381 2.329 2.277 2.227 2.178 2.13 2.083 2.037 1.992 1.948 1.905 1.863 1.822 1.782 1.742 1.703 1.666 1.629 1.593 1.557 1.523 1.489 1.456 1.423 1.392 1.361 1.331 1.301 1.272 1.244 1.216 1.189 1.162 1.136 1.111 1.086 1.062 1.038 1.015 0.993 0.971 0.949 0.928 0.907 0.887 0.867 0.848 0.829 0.81 0.792 0.774 0.757 0.74 0.724 0.707

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.216" PeakHeight="110.0" Num="3" Error="0.0">
-30.37 12.959 -3.079
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.216" EndFrequency="10.55" PeakHeight="292.825" Num="5" zHalfNm="198.744" Error="3.529">
-170.652 -9.164 5.95 -3.411 1.283
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.831" Depth="0.122"/>
<TopsideChapman PeakHeight="292.825" PeakDensity="1380924.4" PeakScaleHeight="69.03" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
