<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-20 -051 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: 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" >
2026.02.20 (051) 09:00:00</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">
FF202605102200900009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="4.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.313" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.413" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.750" 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="4.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="319.428" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.965" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="268.733" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.920" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.294" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="66.907" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.716" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.369" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="71.200" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.930" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="39">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 252.500 255.000 255.000 256.500 258.000 259.500 261.000 262.500 264.000 265.500 267.000 268.500 270.000 270.000 270.000 275.000 275.000 280.000 280.000 280.000 280.000 285.000 290.000 290.000 295.000 295.000 297.440 300.306 303.718 307.850 312.956 319.428 327.897 339.456 356.175 382.500 430.049
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 0 66 69 0 0 0 0 0 0 0 0 0 60 66 69 63 69 57 63 72 72 72 66 69 66 69 63 63 63 54 0 60 69 72 69 66 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -2.734375 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 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="124">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.31 95.0 100.0 105.0 110.0 115.0 120.0 125.0 127.772 130.0 135.0 140.0 145.0 145.544 150.0 155.0 160.0 163.316 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 268.733 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.642 0.836 0.934 0.965 0.949 0.899 0.809 0.738 0.738 0.738 0.738 0.738 0.738 0.795 0.859 0.923 0.965 1.012 1.165 1.328 1.496 1.667 1.844 2.026 2.214 2.41 2.613 2.823 3.036 3.251 3.46 3.659 3.84 3.998 4.13 4.231 4.302 4.341 4.35 4.349 4.338 4.312 4.273 4.223 4.162 4.093 4.017 3.934 3.845 3.753 3.657 3.558 3.458 3.356 3.254 3.152 3.051 2.95 2.85 2.752 2.655 2.561 2.468 2.377 2.289 2.203 2.12 2.039 1.96 1.884 1.81 1.739 1.67 1.604 1.539 1.478 1.418 1.361 1.306 1.252 1.201 1.152 1.105 1.059 1.016 0.974 0.934 0.895 0.858 0.822 0.788 0.756 0.724 0.694 0.665 0.637 0.611 0.585 0.561 0.537 0.515 0.493 0.473 0.453 0.434 0.416 0.398 0.382 0.366 0.35 0.335 0.321 0.308 0.295 0.283 0.271 0.259 0.248 0.238 0.228 0.218 0.209 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.965" PeakHeight="110.0" Num="3" Error="0.0">
-26.346 7.833 -1.177
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.965" EndFrequency="4.35" PeakHeight="268.733" Num="5" zHalfNm="220.92" Error="1.71">
-102.992 -3.092 -0.11 1.292 -0.515
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="53.316" Depth="0.227"/>
<TopsideChapman PeakHeight="268.733" PeakDensity="234770.47" PeakScaleHeight="36.369" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
