<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 08:20:00.000"
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" >
2026.02.03 (034) 08:20:00</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">
FF202603402030820009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.245" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.765" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.700" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="310.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.406" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="296.214" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.634" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.095" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.704" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.873" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.017" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="63.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.330" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="86">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 240.000 240.357 240.714 241.071 241.429 241.786 242.143 242.500 242.857 243.214 243.571 243.929 244.286 244.643 245.000 245.833 246.667 247.500 248.333 249.167 250.000 255.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 260.000 260.000 260.714 261.429 262.143 262.857 263.571 264.286 265.000 270.000 271.429 272.857 274.286 275.714 277.143 278.571 280.000 281.429 282.857 284.286 285.714 287.143 288.571 290.000 290.000 295.000 300.000 305.000 310.000 310.000 315.000 320.000 325.000 330.000 335.000 343.150 353.551 367.281 386.247 414.147 459.238 544.488
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 66 0 0 0 0 0 0 0 72 0 78 0 78 0 0 0 0 0 0 0 60 54 0 0 0 0 78 0 0 72 0 0 69 54 57 60 0 72 0 0 69 72 72 0 0 0 0 0 0 66 60 0 0 0 0 48 0 0 0 57 0 0 60 48 60 0 63 66 66 54 63 63 63 0 66 63 66 63 57 57 0 0 0
</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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="155">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.587 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.167 140.0 145.0 150.0 155.0 160.0 165.0 168.333 170.0 175.0 180.0 185.0 190.0 195.0 197.5 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 296.214 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.268 0.352 0.393 0.406 0.401 0.387 0.363 0.326 0.27 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.212 0.247 0.282 0.318 0.353 0.388 0.406 0.443 0.543 0.704 0.981 1.497 2.403 3.352 4.046 4.559 4.957 5.278 5.54 5.755 5.932 6.077 6.191 6.28 6.343 6.383 6.399 6.4 6.395 6.375 6.34 6.292 6.231 6.16 6.079 5.989 5.892 5.788 5.679 5.565 5.447 5.326 5.202 5.077 4.951 4.824 4.697 4.571 4.444 4.319 4.195 4.073 3.952 3.833 3.717 3.602 3.49 3.38 3.273 3.168 3.065 2.966 2.868 2.774 2.682 2.593 2.506 2.421 2.34 2.26 2.183 2.109 2.036 1.967 1.899 1.833 1.77 1.708 1.649 1.592 1.536 1.482 1.43 1.38 1.332 1.285 1.24 1.196 1.154 1.113 1.074 1.036 1.0 0.964 0.93 0.897 0.865 0.835 0.805 0.777 0.749 0.722 0.697 0.672 0.648 0.625 0.603 0.581 0.561 0.541 0.522 0.503 0.485 0.468 0.451 0.435 0.42 0.405 0.39 0.376 0.363 0.35 0.338 0.326 0.314 0.303 0.292 0.282 0.271 0.262 0.252 0.243 0.235 0.226 0.218 0.211 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.406" PeakHeight="110.0" Num="3" Error="0.0">
-20.373 3.189 -0.229
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.406" EndFrequency="6.4" PeakHeight="296.214" Num="5" zHalfNm="239.634" Error="2.748">
-126.441 45.418 -20.798 4.142 -1.035
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.5" Depth="0.206"/>
<TopsideChapman PeakHeight="296.214" PeakDensity="508188.6" PeakScaleHeight="43.017" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
