<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-08 -039 09:00:00.000"
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 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" >
2026.02.08 (039) 09:00:00</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">
FF202603902080900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.169" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.917" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="5.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="320.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.976" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="292.071" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="232.075" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="85.487" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.481" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.271" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="77.780" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.990" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 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 6.55 6.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 235.000 235.455 235.909 236.364 236.818 237.273 237.727 238.182 238.636 239.091 239.545 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 246.000 247.000 248.000 249.000 250.000 250.000 250.000 250.000 255.000 256.250 257.500 258.750 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 267.500 270.000 270.000 272.500 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 285.000 285.000 285.000 287.500 290.000 290.000 290.000 290.000 295.000 295.000 300.000 300.000 300.000 305.000 310.000 310.000 315.000 315.000 320.000 320.000 325.000 330.000 335.000 338.721 343.150 348.508 355.122 363.493 374.429 389.322 410.791 444.429 504.675
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 60 57 0 0 57 0 66 0 0 0 0 0 69 72 72 72 69 66 72 0 69 72 69 0 0 0 0 72 72 72 69 66 0 0 0 57 60 0 72 72 66 0 69 0 60 63 0 54 57 60 66 69 69 63 66 54 60 66 0 63 66 69 66 66 69 66 69 66 0 66 69 69 69 69 69 66 66 69 66 66 66 66 66 66 66 63 60 51
</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 1.953125 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 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="163">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.297 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.501 130.0 135.0 140.0 145.0 145.002 150.0 155.0 160.0 162.503 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 292.071 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.65 0.846 0.945 0.976 0.96 0.909 0.818 0.754 0.754 0.754 0.754 0.754 0.754 0.817 0.881 0.944 0.976 1.05 1.208 1.378 1.561 1.758 1.972 2.205 2.461 2.743 3.055 3.396 3.762 4.141 4.516 4.872 5.195 5.48 5.727 5.937 6.114 6.259 6.377 6.468 6.535 6.578 6.598 6.6 6.597 6.582 6.553 6.511 6.458 6.395 6.323 6.242 6.154 6.06 5.96 5.854 5.745 5.632 5.517 5.399 5.28 5.159 5.038 4.916 4.794 4.673 4.552 4.432 4.314 4.197 4.081 3.967 3.854 3.744 3.636 3.53 3.426 3.324 3.225 3.127 3.032 2.94 2.85 2.762 2.676 2.593 2.511 2.432 2.356 2.281 2.209 2.138 2.07 2.004 1.94 1.877 1.817 1.758 1.701 1.646 1.593 1.541 1.491 1.442 1.395 1.349 1.305 1.262 1.221 1.181 1.142 1.105 1.068 1.033 0.999 0.966 0.934 0.904 0.874 0.845 0.817 0.79 0.764 0.739 0.714 0.691 0.668 0.646 0.624 0.604 0.584 0.564 0.546 0.528 0.51 0.493 0.477 0.461 0.446 0.431 0.417 0.403 0.39 0.377 0.364 0.352 0.34 0.329 0.318 0.308 0.297 0.288 0.278 0.269 0.26 0.251 0.243 0.235 0.227 0.22 0.212 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.976" PeakHeight="110.0" Num="3" Error="0.0">
-26.397 7.885 -1.191
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.976" EndFrequency="6.6" PeakHeight="292.071" Num="5" zHalfNm="232.075" Error="1.667">
-137.781 15.027 -10.359 4.327 -0.782
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="52.503" Depth="0.222"/>
<TopsideChapman PeakHeight="292.071" PeakDensity="540446.6" PeakScaleHeight="46.271" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
