<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 09:10:00.000"
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: 70% PACIFIC flags: F2o cusp not found, 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" >
2026.10.20 (293) 09:10:00</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">
FF202629310200910009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.631" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.781" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="297.101" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.763" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="225.203" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="184.588" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.170" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="54.115" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.911" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="28.516" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="62.510" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 7.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 285.000 287.500 290.000 290.000 290.000 290.000 292.500 295.000 295.000 295.814 297.101 299.438 305.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 63 51 63 69 72 75 60 69 72 72 69 69 66
</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 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="107">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.834 90.0 95.0 100.0 105.0 110.0 115.0 119.568 120.0 125.0 129.137 130.0 135.0 138.705 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 225.203 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.214 1.18 1.527 1.706 1.763 1.726 1.625 1.625 1.625 1.625 1.637 1.71 1.763 1.849 2.14 2.438 2.775 3.158 3.567 3.972 4.355 4.712 5.047 5.365 5.669 5.963 6.248 6.524 6.784 7.0 7.1 7.1 7.081 7.024 6.934 6.815 6.672 6.51 6.332 6.141 5.941 5.735 5.524 5.312 5.1 4.889 4.68 4.476 4.275 4.08 3.891 3.707 3.53 3.359 3.195 3.038 2.886 2.742 2.603 2.471 2.345 2.225 2.11 2.001 1.898 1.799 1.705 1.616 1.531 1.451 1.375 1.303 1.234 1.169 1.107 1.048 0.993 0.94 0.891 0.843 0.799 0.756 0.716 0.678 0.642 0.608 0.575 0.545 0.516 0.488 0.462 0.438 0.414 0.392 0.372 0.352 0.333 0.315 0.298 0.283 0.267 0.253 0.24 0.227 0.215 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.763" PeakHeight="110.0" Num="3" Error="0.0">
-28.668 10.586 -2.084
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.763" EndFrequency="7.1" PeakHeight="225.203" Num="5" zHalfNm="184.588" Error="3.002">
-78.386 -13.815 8.862 -4.773 1.614
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.705" Depth="0.138"/>
<TopsideChapman PeakHeight="225.203" PeakDensity="625434.25" PeakScaleHeight="28.516" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
