<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 11:00:00.000"
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="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: F2o cusp not found, Multiple candidates for F2x 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) 11:00:00</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">
FF202629710241100009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="4.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.911" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.993" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="1.500" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="1.860" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="101.158" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.478" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.406" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="240.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.829" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="186.920" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="139.094" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.947" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="63.627" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.989" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="35.419" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="70.270" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.930" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.35 4.4 4.45 4.5 4.55 4.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 247.599 256.928 268.657 283.847 304.295
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
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 2.734375 -1.953125 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="8">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
101.158 101.631 102.128 102.652 103.204 103.785 104.398 105.046
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 0 0 51 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625
</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" >
90.0 95.0 97.478 100.0 101.472 105.0 105.467 109.461 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 186.92 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 1.752 1.86 1.828 1.78 1.78 1.78 1.86 1.884 2.107 2.336 2.573 2.816 3.059 3.295 3.52 3.73 3.925 4.101 4.257 4.389 4.492 4.563 4.597 4.6 4.597 4.578 4.544 4.496 4.436 4.365 4.286 4.198 4.105 4.006 3.903 3.797 3.689 3.579 3.468 3.357 3.247 3.137 3.028 2.922 2.816 2.713 2.613 2.514 2.418 2.325 2.235 2.147 2.062 1.98 1.9 1.823 1.749 1.678 1.609 1.542 1.478 1.417 1.358 1.301 1.247 1.194 1.144 1.096 1.049 1.005 0.962 0.921 0.882 0.844 0.808 0.774 0.741 0.709 0.679 0.65 0.622 0.595 0.57 0.545 0.522 0.499 0.478 0.457 0.438 0.419 0.401 0.384 0.367 0.351 0.336 0.322 0.308 0.295 0.282 0.27 0.258 0.247 0.236 0.226 0.216 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.86" PeakHeight="97.478" Num="3" Error="3.325">
-10.678 4.004 -0.804
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.86" EndFrequency="4.6" PeakHeight="186.92" Num="5" zHalfNm="139.094" Error="0.63">
-76.464 -1.693 1.088 -0.602 0.212
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.983" Depth="0.08"/>
<TopsideChapman PeakHeight="186.92" PeakDensity="262531.03" PeakScaleHeight="35.419" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
