<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-15 -288 10:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.10.15 (288) 10:20:00</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">
FF202628810151020009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.596" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.353" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="302.353" 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="2.554" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="231.579" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="188.750" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.701" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="46.690" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.522" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.336" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="84.710" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="48">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 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 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 277.500 280.000 275.000 276.250 277.500 278.750 280.000 280.833 281.667 282.500 283.333 284.167 285.000 290.000 289.000 288.000 287.000 286.000 285.000 285.000 286.429 287.857 289.286 290.714 292.143 293.571 295.000 295.000 295.000 295.000 295.000 300.000 298.333 298.418 298.515 298.627 298.758 298.913 299.101 299.332 299.623 300.000 300.510 301.236 302.353 304.296 308.515
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 57 0 0 0 0 54 48 0 0 0 0 51 0 0 0 0 0 75 66 0 0 0 81 0 0 0 72 0 0 75 0 0 0 0 0 0 78 0 78 0 75 0 81 66 0 72
</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 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 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="110">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.628 90.0 95.0 100.0 105.0 110.0 115.0 115.316 120.0 120.633 125.0 125.949 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 231.579 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.231 1.715 2.211 2.471 2.554 2.445 2.43 2.43 2.43 2.532 2.554 2.776 3.045 3.279 3.486 3.675 3.853 4.024 4.19 4.355 4.519 4.685 4.855 5.029 5.211 5.402 5.605 5.826 6.069 6.346 6.669 7.008 7.05 7.041 6.997 6.92 6.815 6.686 6.536 6.371 6.192 6.003 5.807 5.606 5.402 5.196 4.992 4.789 4.589 4.392 4.2 4.013 3.831 3.655 3.485 3.321 3.163 3.011 2.865 2.725 2.592 2.464 2.342 2.225 2.114 2.007 1.906 1.81 1.718 1.631 1.548 1.469 1.394 1.323 1.255 1.19 1.129 1.071 1.016 0.964 0.914 0.867 0.822 0.78 0.739 0.701 0.665 0.631 0.598 0.567 0.538 0.51 0.483 0.458 0.435 0.412 0.391 0.371 0.351 0.333 0.316 0.3 0.284 0.269 0.255 0.242 0.23 0.218 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.554" PeakHeight="110.0" Num="3" Error="0.0">
-29.773 12.093 -2.692
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.554" EndFrequency="7.05" PeakHeight="231.579" Num="5" zHalfNm="188.75" Error="2.388">
-75.964 -43.807 14.566 0.917 -1.342
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.949" Depth="0.124"/>
<TopsideChapman PeakHeight="231.579" PeakDensity="616656.3" PeakScaleHeight="29.336" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
