<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 10:30:00.000"
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="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 22 0 0 0 0 0 0 0 0 0 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" >
2026.10.24 (297) 10:30:00</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">
FF202629710241030009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="6.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.626" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.756" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.700" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.960" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="105.774" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.777" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.655" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="88" Val="5.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="292.216" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.637" 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="205.768" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="156.593" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.798" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="64.417" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.789" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.022" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.610" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 290.000 290.000 292.216 295.335 300.055 308.026
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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 1.953125 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.7 1.75 1.8 1.85 1.9 1.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.774 107.397 109.142 111.025 113.066 115.291
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 0 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -1.953125 0.390625 -1.953125 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="116">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.0 95.0 100.0 100.777 105.0 105.685 110.0 110.594 115.0 115.502 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 205.768 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.648 1.955 1.96 1.892 1.868 1.868 1.868 1.951 1.96 2.192 2.435 2.694 2.978 3.281 3.588 3.882 4.159 4.416 4.657 4.883 5.097 5.3 5.492 5.67 5.826 5.945 5.999 6.0 5.992 5.962 5.912 5.844 5.761 5.664 5.556 5.438 5.312 5.18 5.042 4.901 4.757 4.612 4.466 4.32 4.174 4.03 3.888 3.748 3.611 3.476 3.345 3.217 3.092 2.971 2.853 2.739 2.629 2.523 2.42 2.32 2.225 2.133 2.044 1.958 1.876 1.797 1.721 1.648 1.578 1.511 1.447 1.385 1.326 1.269 1.214 1.162 1.112 1.064 1.018 0.974 0.932 0.892 0.853 0.816 0.781 0.747 0.714 0.683 0.654 0.625 0.598 0.572 0.547 0.523 0.501 0.479 0.458 0.438 0.419 0.401 0.383 0.367 0.351 0.335 0.321 0.307 0.293 0.281 0.268 0.257 0.245 0.235 0.224 0.215 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.96" PeakHeight="100.777" Num="3" Error="3.445">
-15.453 5.878 -1.202
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.96" EndFrequency="6.0" PeakHeight="205.768" Num="5" zHalfNm="156.593" Error="2.924">
-84.147 -10.452 6.744 -3.695 1.284
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.725" Depth="0.092"/>
<TopsideChapman PeakHeight="205.768" PeakDensity="446650.12" PeakScaleHeight="35.022" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
