<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-07 -038 09:20:00.000"
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="18.0">
<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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.02.07 (038) 09:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603802070920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.597" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.379" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="6.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="276.280" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.406" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="241.513" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="201.843" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.941" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="56.614" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.164" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.559" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="46.800" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.850" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="75">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 230.000 230.000 230.000 230.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 242.500 245.000 246.667 248.333 250.000 250.000 250.000 250.000 255.000 255.000 255.000 260.000 262.500 265.000 265.000 265.000 265.000 270.000 270.000 271.721 273.778 276.280 279.389 283.355 288.592 295.825 306.466 323.661 356.168 440.843
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 66 69 69 66 66 63 66 66 69 69 69 69 69 69 0 66 66 0 0 66 63 0 0 63 0 63 69 0 72 63 0 0 0 0 0 0 0 66 63 66 0 66 69 66 0 63 0 0 60 66 66 66 60 0 66 57 0 54 63 69 69 69 69 69 66 69 69 69 66 57 60 69 63 54
</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 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="116">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.98 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.977 125.0 130.0 133.953 135.0 140.0 145.0 145.93 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 241.513 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.202 0.939 1.218 1.361 1.406 1.381 1.302 1.255 1.255 1.255 1.255 1.268 1.331 1.394 1.406 1.609 1.837 2.057 2.278 2.507 2.749 3.011 3.3 3.627 4.001 4.428 4.891 5.342 5.723 6.015 6.227 6.372 6.46 6.498 6.5 6.492 6.457 6.395 6.309 6.204 6.082 5.945 5.797 5.64 5.475 5.306 5.133 4.958 4.782 4.606 4.432 4.261 4.092 3.926 3.764 3.606 3.453 3.304 3.16 3.021 2.887 2.758 2.633 2.514 2.399 2.289 2.183 2.082 1.985 1.892 1.804 1.719 1.638 1.561 1.487 1.416 1.349 1.285 1.224 1.165 1.109 1.056 1.006 0.958 0.912 0.868 0.826 0.787 0.749 0.713 0.679 0.646 0.615 0.585 0.557 0.53 0.505 0.48 0.457 0.435 0.414 0.394 0.375 0.357 0.34 0.323 0.308 0.293 0.279 0.265 0.253 0.24 0.229 0.218 0.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.406" PeakHeight="110.0" Num="3" Error="0.0">
-27.892 9.598 -1.726
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.406" EndFrequency="6.5" PeakHeight="241.513" Num="5" zHalfNm="201.843" Error="2.69">
-92.057 -1.257 -6.286 4.923 -0.906
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="35.93" Depth="0.151"/>
<TopsideChapman PeakHeight="241.513" PeakDensity="524193.56" PeakScaleHeight="31.559" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
