<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 08:30:00.000"
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="15.0">
<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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.10.17 (290) 08:30:00</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">
FF202629010170830009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.251" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.809" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="5.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="295.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.926" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="283.804" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="234.244" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.819" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.487" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.117" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.435" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="71.190" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="16">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 301.000 307.000 313.000 319.000 325.000 330.000 335.000 345.000 355.000 365.000 375.000 375.000 382.118 395.601 430.902
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 63 75 78 75 78 72 0 66 0 0 63
</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 1.171875 0.390625 1.171875 0.390625 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="138">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.359 95.0 100.0 105.0 110.0 115.0 120.0 125.0 128.934 130.0 135.0 140.0 145.0 147.867 150.0 155.0 160.0 165.0 166.801 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 283.804 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.616 0.803 0.897 0.926 0.911 0.863 0.777 0.675 0.675 0.675 0.675 0.675 0.675 0.703 0.77 0.836 0.902 0.926 1.032 1.21 1.406 1.618 1.849 2.097 2.364 2.647 2.948 3.261 3.586 3.916 4.248 4.574 4.89 5.187 5.462 5.708 5.921 6.098 6.236 6.333 6.387 6.4 6.399 6.383 6.348 6.294 6.224 6.14 6.043 5.935 5.819 5.694 5.564 5.428 5.288 5.146 5.001 4.856 4.71 4.564 4.419 4.276 4.134 3.994 3.857 3.723 3.591 3.463 3.337 3.215 3.097 2.981 2.869 2.761 2.656 2.554 2.456 2.361 2.269 2.181 2.095 2.013 1.934 1.857 1.783 1.713 1.644 1.579 1.516 1.455 1.396 1.34 1.286 1.235 1.185 1.137 1.091 1.047 1.004 0.964 0.925 0.887 0.851 0.816 0.783 0.751 0.721 0.692 0.663 0.636 0.61 0.586 0.562 0.539 0.517 0.496 0.475 0.456 0.437 0.42 0.403 0.386 0.37 0.355 0.341 0.327 0.313 0.301 0.288 0.277 0.265 0.254 0.244 0.234 0.224 0.215 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.926" PeakHeight="110.0" Num="3" Error="0.0">
-26.154 7.637 -1.124
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.926" EndFrequency="6.4" PeakHeight="283.804" Num="5" zHalfNm="234.244" Error="1.491">
-117.374 0.649 -0.764 0.587 -0.101
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="56.801" Depth="0.251"/>
<TopsideChapman PeakHeight="283.804" PeakDensity="508188.6" PeakScaleHeight="37.435" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
