<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 20:50:00.000"
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="12.0">
<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 F2x 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" >
2026.10.20 (293) 20:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629310202050009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.989" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.215" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="385.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="385.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.736" 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="1.011" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="306.279" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="249.926" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.246" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="80.319" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.512" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.372" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.770" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 390.000 390.000 390.000 390.000 395.000 395.000 397.665 400.736 404.315 408.538 413.597 419.768 427.461
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 0 0 0 60 60 60 60 54 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 2.734375 -1.953125 -2.734375 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="159">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.26 95.0 100.0 105.0 110.0 115.0 120.0 125.0 126.704 130.0 135.0 140.0 143.408 145.0 150.0 155.0 160.0 160.112 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 306.279 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.673 0.876 0.979 1.011 0.994 0.941 0.848 0.804 0.804 0.804 0.804 0.804 0.824 0.886 0.948 1.01 1.011 1.178 1.34 1.511 1.697 1.902 2.13 2.381 2.654 2.946 3.251 3.564 3.88 4.196 4.51 4.822 5.129 5.433 5.732 6.026 6.314 6.595 6.867 7.128 7.372 7.596 7.789 7.945 8.05 8.098 8.1 8.094 8.066 8.019 7.954 7.872 7.775 7.666 7.545 7.414 7.274 7.128 6.975 6.818 6.657 6.494 6.328 6.162 5.994 5.827 5.661 5.496 5.333 5.172 5.012 4.856 4.702 4.552 4.404 4.26 4.119 3.982 3.848 3.718 3.591 3.468 3.348 3.232 3.119 3.01 2.904 2.801 2.702 2.606 2.513 2.423 2.336 2.252 2.171 2.092 2.017 1.944 1.873 1.805 1.739 1.676 1.615 1.556 1.499 1.444 1.391 1.34 1.291 1.243 1.198 1.154 1.111 1.07 1.031 0.993 0.956 0.921 0.887 0.854 0.823 0.792 0.763 0.735 0.708 0.682 0.656 0.632 0.609 0.586 0.565 0.544 0.524 0.504 0.485 0.467 0.45 0.434 0.417 0.402 0.387 0.373 0.359 0.346 0.333 0.321 0.309 0.297 0.286 0.276 0.265 0.256 0.246 0.237 0.228 0.22 0.212 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.011" PeakHeight="110.0" Num="3" Error="0.0">
-26.553 8.049 -1.236
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.011" EndFrequency="8.1" PeakHeight="306.279" Num="5" zHalfNm="249.926" Error="3.228">
-139.674 -11.384 7.349 -4.24 1.782
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="50.112" Depth="0.207"/>
<TopsideChapman PeakHeight="306.279" PeakDensity="814019.9" PeakScaleHeight="41.372" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
