<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 10:00:00.000"
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="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: 80% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.10.21 (294) 10:00:00</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">
FF202629410211000009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.142" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.891" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="375.000" 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="2.390" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="261.394" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="196.534" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.419" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="90.070" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="26.476" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.576" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="94.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.000" 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" >
9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 370.000 372.500 375.000 385.000 385.000 392.247 463.990
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 51 60 57 54 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 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="177">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.663 90.0 95.0 100.0 105.0 110.0 115.0 116.138 120.0 122.277 125.0 128.415 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 261.394 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.228 1.604 2.069 2.313 2.39 2.307 2.264 2.264 2.264 2.32 2.39 2.475 2.75 3.041 3.348 3.673 4.014 4.371 4.741 5.121 5.508 5.899 6.29 6.678 7.061 7.436 7.798 8.147 8.478 8.788 9.075 9.335 9.564 9.759 9.918 10.037 10.114 10.148 10.15 10.145 10.12 10.077 10.016 9.94 9.849 9.745 9.63 9.503 9.368 9.224 9.072 8.915 8.752 8.585 8.414 8.241 8.065 7.888 7.71 7.532 7.353 7.176 6.999 6.823 6.65 6.478 6.308 6.14 5.975 5.812 5.653 5.496 5.342 5.192 5.044 4.9 4.759 4.621 4.486 4.355 4.226 4.101 3.979 3.861 3.745 3.632 3.523 3.416 3.313 3.212 3.114 3.019 2.926 2.836 2.749 2.664 2.582 2.502 2.425 2.35 2.277 2.206 2.137 2.071 2.006 1.943 1.883 1.824 1.767 1.711 1.658 1.606 1.555 1.507 1.459 1.413 1.369 1.326 1.284 1.244 1.205 1.167 1.13 1.094 1.06 1.026 0.994 0.963 0.932 0.903 0.874 0.847 0.82 0.794 0.769 0.745 0.721 0.698 0.676 0.655 0.634 0.614 0.595 0.576 0.558 0.54 0.523 0.507 0.491 0.475 0.46 0.445 0.431 0.418 0.404 0.392 0.379 0.367 0.356 0.344 0.334 0.323 0.313 0.303 0.293 0.284 0.275 0.266 0.258 0.25 0.242 0.234 0.227 0.22 0.213 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.39" PeakHeight="110.0" Num="3" Error="0.0">
-29.589 11.834 -2.582
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.39" EndFrequency="10.15" PeakHeight="261.394" Num="5" zHalfNm="196.534" Error="0.623">
-132.172 -1.386 0.899 -0.517 0.197
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="18.415" Depth="0.126"/>
<TopsideChapman PeakHeight="261.394" PeakDensity="1278194.8" PeakScaleHeight="48.576" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
