<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 08:00:00.000"
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 55 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 25% PACIFIC flags: Severe F-spread, F2o cusp not found, Multiple candidates for F2x cusp, One of F2 cusps was derived from the other, F2O model cusp does not fit trace, Unidentified traces above foF2</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) 08:00:00</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">
FF202629410210800009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.259" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.018" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="342.768" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="342.768" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="357.373" 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="0.471" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="300.409" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="264.833" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.882" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="51.813" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.849" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="26.338" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="53.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.780" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.45 5.5 5.55 5.6 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 6.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
342.768 342.886 343.017 343.162 343.325 343.507 343.715 343.952 344.226 344.547 344.926 345.381 345.939 346.638 347.540 348.748 350.449 353.023 357.373 365.000 395.143
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 1.171875 -0.390625 -0.390625 1.171875 0.390625 1.171875 1.171875 -0.390625 1.171875 2.734375 0.390625 1.171875 0.390625 -0.390625 1.171875 0.390625 1.171875 1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="114">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.88 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.326 140.0 145.0 150.0 155.0 160.0 165.0 166.651 170.0 175.0 180.0 185.0 190.0 194.977 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.409 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.311 0.408 0.456 0.471 0.465 0.446 0.413 0.362 0.282 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.232 0.28 0.328 0.376 0.423 0.471 0.472 0.618 0.769 0.943 1.149 1.393 1.676 1.992 2.334 2.693 3.062 3.438 3.816 4.196 4.573 4.946 5.307 5.648 5.955 6.209 6.382 6.45 6.45 6.432 6.373 6.279 6.157 6.01 5.843 5.661 5.468 5.267 5.061 4.852 4.643 4.436 4.231 4.031 3.835 3.645 3.461 3.283 3.112 2.949 2.792 2.642 2.499 2.363 2.233 2.11 1.993 1.882 1.777 1.677 1.583 1.494 1.409 1.329 1.254 1.183 1.115 1.052 0.992 0.935 0.881 0.831 0.783 0.739 0.696 0.656 0.619 0.583 0.55 0.518 0.488 0.46 0.434 0.409 0.385 0.363 0.342 0.322 0.304 0.286 0.27 0.254 0.24 0.226 0.213 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.471" PeakHeight="110.0" Num="3" Error="0.0">
-21.795 4.022 -0.347
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.471" EndFrequency="6.45" PeakHeight="300.409" Num="5" zHalfNm="264.833" Error="1.965">
-101.139 -7.908 5.138 -2.715 1.192
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="84.977" Depth="0.271"/>
<TopsideChapman PeakHeight="300.409" PeakDensity="516160.06" PeakScaleHeight="26.338" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
