<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-17 -048 03:00:00.000"
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="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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.02.17 (048) 03:00:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.14" 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">
FF202604802170300009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.548" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="45.234" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="210.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="210.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="12.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="301.411" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" 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="255.253" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="227.102" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.062" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="40.978" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.771" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="20.995" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="38.410" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="196">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
215.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 210.000 215.000 215.000 215.000 215.000 210.000 212.500 215.000 220.000 217.500 215.000 215.000 215.000 215.000 215.000 215.000 220.000 220.000 220.000 220.000 220.000 220.000 220.000 218.333 216.667 215.000 215.000 220.000 225.000 225.000 221.667 218.333 215.000 215.000 215.000 215.000 220.000 220.000 220.000 225.000 225.000 225.000 225.000 225.000 220.000 220.000 220.000 220.000 235.000 235.000 235.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 225.000 230.000 235.000 225.000 225.000 225.000 225.000 230.000 227.500 225.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 235.000 232.500 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 245.000 245.000 247.500 250.000 250.000 250.000 250.000 250.000 250.000 256.667 263.333 270.000 265.000 265.000 255.000 255.000 260.000 260.000 265.000 265.000 265.000 265.000 266.250 267.500 268.750 270.000 265.000 270.000 270.000 270.000 270.000 265.000 265.000 265.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 285.000 280.000 283.000 286.000 289.000 292.000 295.000 295.000 296.016 297.143 298.401 299.813 301.411 303.234 305.331 307.771 310.645 314.080 318.258 323.448
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 78 0 78 0 0 81 0 72 78 0 81 78 81 69 72 78 0 0 60 0 66 0 78 78 0 78 0 72 0 0 66 0 75 0 0 81 78 0 66 0 0 0 75 78 81 0 0 0 78 75 0 0 69 0 81 75 78 72 63 0 69 78 81 0 72 78 0 75 81 78 0 0 81 84 81 81 78 72 81 75 75 75 78 81 75 0 81 63 0 72 75 75 81 0 0 0 72 84 0 0 72 69 66 81 0 72 0 75 78 81 78 66 60 69 72 57 72 72 78 0 75 66 57 57 0 72 78 0 63 60 57 54 66 0 0 72 0 72 75 75 72 0 0 54 0 48 66 60 51 60 48 48 54 54 0 48 0 48 60 51 0 0 60 57 54 54 54 57 63 66 66 57 60 0 51 60 0 0 0 0 0 57 66 45 51 60 0 63 0 60 60 57 54 57 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="99">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 133.333 135.0 140.0 145.0 150.0 155.0 156.667 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 255.253 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.349 0.332 0.301 0.253 0.204 0.204 0.204 0.204 0.204 0.204 0.204 0.225 0.258 0.29 0.322 0.354 0.57 0.88 1.408 2.311 3.524 4.823 6.108 7.352 8.539 9.647 10.648 11.502 12.165 12.593 12.75 12.75 12.689 12.508 12.228 11.868 11.448 10.985 10.492 9.982 9.464 8.947 8.437 7.939 7.456 6.991 6.547 6.123 5.72 5.339 4.98 4.642 4.325 4.027 3.748 3.487 3.243 3.016 2.803 2.606 2.421 2.25 2.09 1.942 1.803 1.675 1.555 1.444 1.341 1.245 1.156 1.074 0.997 0.926 0.859 0.798 0.741 0.688 0.638 0.593 0.55 0.511 0.474 0.44 0.408 0.379 0.352 0.327 0.303 0.282 0.261 0.243 0.225 0.209

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="12.75" PeakHeight="255.253" Num="5" zHalfNm="227.102" Error="1.924">
-81.776 8.662 -1.428 -1.683 0.972
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="70.0" Depth="0.15"/>
<TopsideChapman PeakHeight="255.253" PeakDensity="2016904.5" PeakScaleHeight="20.995" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
