<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-12 -043 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: 100%</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" >
2026.02.12 (043) 09:20:00</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">
FF202604302120920009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.286" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.043" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="5.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="315.973" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.399" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="275.272" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="221.143" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.941" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="77.313" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.620" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.329" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="65.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.630" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="70">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 262.500 265.000 265.000 260.000 260.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 290.000 290.000 293.333 296.667 300.000 300.000 300.000 300.000 305.000 310.000 310.000 312.743 315.973 319.834 324.529 330.364 337.809 347.638 361.213 381.182 413.452 474.451
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 66 69 69 69 66 66 66 66 66 69 69 69 72 72 72 72 0 0 0 0 63 69 0 66 0 0 63 63 60 0 66 69 72 0 72 72 48 69 57 63 66 69 57 63 66 66 63 66 0 45 54 63 69 66 69 66 69 69 69 69 66 69 69 69 69 60 0 48
</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 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="151">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.983 90.0 95.0 100.0 105.0 110.0 115.0 120.0 122.033 125.0 130.0 134.066 135.0 140.0 145.0 146.099 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 275.272 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.201 0.934 1.212 1.354 1.399 1.374 1.295 1.247 1.247 1.247 1.247 1.259 1.322 1.385 1.399 1.534 1.697 1.852 2.004 2.155 2.309 2.468 2.633 2.808 2.995 3.198 3.42 3.665 3.939 4.241 4.563 4.885 5.178 5.426 5.626 5.783 5.902 5.991 6.051 6.087 6.1 6.1 6.093 6.071 6.036 5.988 5.93 5.861 5.783 5.697 5.604 5.505 5.401 5.292 5.18 5.066 4.949 4.831 4.711 4.591 4.471 4.351 4.232 4.113 3.996 3.88 3.766 3.654 3.543 3.435 3.328 3.224 3.123 3.023 2.926 2.832 2.74 2.65 2.563 2.478 2.396 2.316 2.238 2.163 2.09 2.019 1.95 1.884 1.819 1.757 1.697 1.638 1.582 1.527 1.474 1.423 1.374 1.326 1.28 1.235 1.192 1.15 1.11 1.071 1.034 0.997 0.962 0.929 0.896 0.864 0.834 0.805 0.776 0.749 0.723 0.697 0.673 0.649 0.626 0.604 0.583 0.562 0.542 0.523 0.505 0.487 0.47 0.453 0.437 0.421 0.407 0.392 0.378 0.365 0.352 0.34 0.328 0.316 0.305 0.294 0.284 0.274 0.264 0.255 0.246 0.237 0.228 0.22 0.213 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.399" PeakHeight="110.0" Num="3" Error="0.0">
-27.873 9.575 -1.719
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.399" EndFrequency="6.1" PeakHeight="275.272" Num="5" zHalfNm="221.143" Error="2.469">
-124.242 -1.329 -9.33 7.073 -1.345
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="36.099" Depth="0.152"/>
<TopsideChapman PeakHeight="275.272" PeakDensity="461662.53" PeakScaleHeight="43.329" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
