<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 16:10:00.000"
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" >
2026.03.20 (079) 16:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607903201610009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.615" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.931" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="460.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.361" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.347" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="354.851" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.564" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.762" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="148.398" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.534" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="83.791" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="178.140" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.550" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 286.429 287.857 289.286 290.714 292.143 293.571 295.000 295.000 297.500 300.000 300.000 300.000 300.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 315.000 317.500 320.000 320.000 320.000 322.500 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 338.750 342.500 346.250 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 460.000 465.000 470.000 480.000 485.000 490.000 500.000 505.000 510.000 519.388 530.169 542.676 557.360 574.845 596.014 622.172 655.315
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 48 0 45 0 51 45 0 48 0 51 54 51 57 60 0 57 0 54 57 0 51 0 54 0 54 54 51 54 60 54 60 57 0 0 0 45 54 60 60 57 60 54 60 63 57 63 63 63 66 63 54 60 51 60 66 60 66 60 66 57 66 66 63 54 60 63 57 63 63 60 63 60 63 63 60 63 57 63 57 60 54 60 57 60 60 57 60 60 60 57 57 57 57 54 57 54 54 54 54 48 51 48 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 1.953125 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 -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 0.390625 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.487 90.0 95.0 100.0 105.0 110.0 111.668 113.336 115.0 115.004 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 354.851 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.261 2.909 3.252 3.361 3.238 3.238 3.361 3.361 3.518 3.664 3.805 3.943 4.079 4.215 4.351 4.488 4.627 4.767 4.91 5.055 5.203 5.354 5.507 5.663 5.823 5.985 6.15 6.318 6.488 6.661 6.836 7.013 7.191 7.371 7.552 7.733 7.914 8.095 8.275 8.453 8.629 8.802 8.971 9.136 9.295 9.447 9.592 9.727 9.852 9.964 10.063 10.146 10.213 10.261 10.291 10.3 10.3 10.296 10.286 10.268 10.245 10.215 10.18 10.139 10.093 10.041 9.986 9.925 9.861 9.792 9.72 9.645 9.566 9.484 9.4 9.313 9.223 9.132 9.038 8.943 8.846 8.748 8.648 8.548 8.446 8.343 8.24 8.136 8.032 7.928 7.823 7.718 7.613 7.508 7.403 7.299 7.195 7.091 6.987 6.885 6.782 6.681 6.58 6.479 6.38 6.281 6.183 6.086 5.99 5.895 5.801 5.707 5.615 5.524 5.434 5.344 5.256 5.169 5.083 4.999 4.915 4.832 4.75 4.67 4.591 4.512 4.435 4.359 4.284 4.21 4.137 4.066 3.995 3.925 3.857 3.789 3.723 3.658 3.593 3.53 3.467 3.406 3.346 3.286 3.228 3.17 3.114 3.058 3.004 2.95 2.897 2.845 2.794 2.744 2.694 2.646 2.598 2.551 2.505 2.46 2.416 2.372 2.329 2.287 2.245 2.204 2.164 2.125 2.086 2.048 2.011 1.974 1.938 1.903 1.868 1.834 1.801 1.768 1.736 1.704 1.673 1.642 1.612 1.582 1.553 1.525

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.361" PeakHeight="110.0" Num="3" Error="0.0">
-30.48 13.12 -3.153
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.361" EndFrequency="10.3" PeakHeight="354.851" Num="5" zHalfNm="242.564" Error="3.5">
-211.33 -35.347 5.83 0.156 0.844
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.004" Depth="0.123"/>
<TopsideChapman PeakHeight="354.851" PeakDensity="1316253.1" PeakScaleHeight="83.791" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
