<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 19:50:00.000"
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="14.0">
<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="1 2 0 0 0 0 0 0 0 33 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, 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" >
2026.10.24 (297) 19:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629710241950009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="4.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.794" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.400" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.950" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.210" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="90.584" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="90.333" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="4.136" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="279.405" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.094" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="207.147" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="166.430" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.473" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="38.266" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.994" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="28.406" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.510" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="33">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 260.000 255.000 256.429 257.857 259.286 260.714 262.143 262.500 262.857 263.214 263.571 263.929 264.286 264.643 265.000 265.000 265.000 266.667 268.333 268.499 268.688 268.907 269.163 269.465 269.829 270.274 270.832 271.553 272.517 273.875 275.930 279.405
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 0 0 0 66 0 0 0 0 0 0 0 0 54 0 0 0 0 0 0 54 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 -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>
<Trace Type="standard" Layer="E" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.95 2.0 2.05 2.1 2.15 2.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
90.584 91.576 92.730 94.111 95.845 98.206
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 75 78 78 81 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="97">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
86.135 90.0 90.333 95.0 98.029 100.0 105.0 105.725 110.0 113.421 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.147 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.203 2.21 2.16 2.072 2.072 2.072 2.072 2.149 2.21 2.272 2.425 2.55 2.663 2.769 2.872 2.973 3.075 3.179 3.286 3.397 3.514 3.64 3.777 3.931 4.109 4.323 4.585 4.82 4.85 4.845 4.816 4.762 4.688 4.596 4.489 4.37 4.242 4.107 3.967 3.824 3.679 3.533 3.388 3.244 3.103 2.965 2.83 2.698 2.571 2.448 2.33 2.216 2.107 2.002 1.901 1.805 1.713 1.626 1.542 1.462 1.387 1.315 1.246 1.181 1.119 1.06 1.004 0.951 0.901 0.854 0.808 0.765 0.725 0.686 0.65 0.615 0.583 0.552 0.522 0.494 0.468 0.443 0.419 0.397 0.376 0.356 0.337 0.319 0.302 0.286 0.27 0.256 0.242 0.229 0.217 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.21" PeakHeight="90.333" Num="3" Error="0.567">
-6.074 2.383 -0.507
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.21" EndFrequency="4.85" PeakHeight="207.147" Num="5" zHalfNm="166.43" Error="2.462">
-62.517 -38.781 4.307 3.874 -0.609
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="23.088" Depth="0.138"/>
<TopsideChapman PeakHeight="207.147" PeakDensity="291842.44" PeakScaleHeight="28.406" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
