<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-03 -093 05:30:00.000"
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" >
2026.04.03 (093) 05:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609304030530009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.969" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.038" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="6.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="386.249" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="335.276" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="260.220" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.696" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="106.580" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.093" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.568" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="91.440" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.760" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="99">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.85 1.9 1.95 2.0 2.05 2.1 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 6.45 6.5 6.55 6.6 6.65 6.7 6.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 240.000 230.000 240.000 240.000 237.500 235.000 240.000 241.000 242.000 243.000 244.000 245.000 246.000 247.000 248.000 249.000 250.000 250.000 250.000 250.000 255.000 256.250 257.500 258.750 260.000 260.000 260.000 260.000 260.000 261.250 262.500 263.750 265.000 266.250 267.500 268.750 270.000 270.000 272.500 275.000 275.000 277.500 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 290.000 295.000 297.500 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 310.000 310.000 315.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 345.000 345.000 350.000 350.000 355.000 360.000 360.000 363.896 368.328 373.417 379.320 386.249 394.496 404.478 416.807 432.421 452.833 480.657 520.827 583.902
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 0 60 0 66 0 69 69 0 0 0 0 0 54 0 0 0 69 75 75 78 66 0 48 0 63 66 0 0 78 0 69 0 75 0 66 0 72 72 0 66 66 0 57 63 72 75 66 69 72 60 66 0 72 72 66 0 57 66 69 72 66 69 60 69 72 72 69 60 66 72 66 69 66 72 66 72 69 63 72 69 69 69 69 69 69 66 66 66 63 66 66 66 63 60 57 54 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 -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 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 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.0 140.0 145.0 150.0 155.0 160.0 165.0 166.0 170.0 175.0 180.0 185.0 190.0 194.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 335.276 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.35 0.338 0.318 0.286 0.239 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.222 0.25 0.277 0.305 0.332 0.354 0.364 0.425 0.51 0.635 0.834 1.156 1.634 2.198 2.749 3.249 3.693 4.089 4.443 4.76 5.044 5.3 5.53 5.736 5.92 6.082 6.226 6.351 6.457 6.547 6.62 6.676 6.717 6.741 6.75 6.75 6.745 6.731 6.708 6.676 6.636 6.588 6.534 6.474 6.407 6.336 6.259 6.179 6.095 6.007 5.917 5.824 5.728 5.631 5.533 5.433 5.332 5.231 5.13 5.028 4.926 4.824 4.723 4.622 4.522 4.423 4.325 4.227 4.131 4.036 3.942 3.85 3.759 3.669 3.581 3.494 3.409 3.326 3.244 3.163 3.084 3.007 2.931 2.857 2.785 2.714 2.644 2.576 2.51 2.445 2.382 2.32 2.259 2.2 2.143 2.087 2.032 1.978 1.926 1.875 1.825 1.777 1.73 1.684 1.639 1.595 1.553 1.511 1.471 1.431 1.393 1.356 1.319 1.284 1.249 1.216 1.183 1.151 1.12 1.09 1.06 1.032 1.004 0.977 0.95 0.925 0.9 0.875 0.852 0.828 0.806 0.784 0.763 0.742 0.722 0.703 0.683 0.665 0.647 0.629 0.612 0.596 0.579 0.564 0.548 0.533 0.519 0.505 0.491 0.478 0.465 0.452 0.44 0.428 0.416 0.405 0.394 0.383 0.373 0.363 0.353 0.343 0.334 0.325 0.316 0.307 0.299 0.291 0.283

</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="6.75" PeakHeight="335.276" Num="5" zHalfNm="260.22" Error="2.208">
-176.221 53.337 -19.663 1.835 -0.564
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="84.0" Depth="0.154"/>
<TopsideChapman PeakHeight="335.276" PeakDensity="565291.56" PeakScaleHeight="56.568" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
