<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 09:50:00.000"
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: 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) 09:50:00</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">
FF202629410210950009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="8.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.452" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.827" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="0.600" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="321.372" 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="2.292" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="235.989" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="183.213" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.230" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.273" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="14.205" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.641" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="80.380" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="20">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 310.000 315.000 310.000 310.000 310.248 310.531 310.859 311.241 311.694 312.238 312.904 313.740 314.817 316.261 318.294 321.372 326.576 337.275 371.904
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 54 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 66 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 0.390625 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="137">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.686 90.0 95.0 100.0 105.0 110.0 115.0 116.643 120.0 123.287 125.0 129.93 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 235.989 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.538 1.985 2.218 2.292 2.221 2.165 2.165 2.165 2.198 2.292 2.296 2.591 2.879 3.187 3.523 3.885 4.262 4.641 5.009 5.361 5.697 6.017 6.323 6.618 6.901 7.175 7.438 7.689 7.922 8.125 8.277 8.348 8.35 8.341 8.306 8.246 8.164 8.063 7.945 7.812 7.666 7.509 7.343 7.17 6.991 6.808 6.622 6.433 6.244 6.055 5.866 5.679 5.494 5.311 5.132 4.955 4.782 4.613 4.448 4.287 4.131 3.979 3.831 3.687 3.548 3.414 3.283 3.158 3.036 2.918 2.805 2.696 2.59 2.488 2.39 2.296 2.205 2.118 2.034 1.953 1.875 1.8 1.728 1.659 1.592 1.528 1.467 1.408 1.351 1.297 1.245 1.194 1.146 1.1 1.055 1.013 0.972 0.932 0.895 0.858 0.824 0.79 0.758 0.727 0.698 0.67 0.642 0.616 0.591 0.567 0.544 0.522 0.501 0.481 0.461 0.442 0.424 0.407 0.391 0.375 0.36 0.345 0.331 0.318 0.305 0.292 0.28 0.269 0.258 0.248 0.237 0.228 0.219 0.21 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.292" PeakHeight="110.0" Num="3" Error="0.0">
-29.47 11.668 -2.512
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.292" EndFrequency="8.35" PeakHeight="235.989" Num="5" zHalfNm="183.213" Error="2.742">
-98.403 -13.042 8.359 -4.363 1.39
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.93" Depth="0.127"/>
<TopsideChapman PeakHeight="235.989" PeakDensity="865043.44" PeakScaleHeight="37.641" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
