<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 21:30:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.03.23 (082) 21:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608203232130009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.936" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.761" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="260.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="260.000" 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="11.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.280" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.625" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="333.968" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="287.773" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.172" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="67.916" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.041" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.031" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="69.890" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.770" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="175">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 275.000 275.000 275.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 271.429 272.857 274.286 275.714 277.143 278.571 280.000 275.000 275.000 275.000 275.714 276.429 277.143 277.857 278.571 279.286 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.500 281.000 281.500 282.000 282.500 283.000 283.500 284.000 284.500 285.000 285.000 286.667 288.333 290.000 291.667 293.333 295.000 295.000 295.000 295.000 295.000 295.000 296.000 297.000 298.000 299.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 305.000 307.500 310.000 310.000 310.000 310.000 311.250 312.500 313.750 315.000 315.000 315.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 332.500 335.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 365.000 370.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 385.000 387.500 390.000 390.000 392.500 395.000 400.000 405.000 410.000 400.000 415.000 415.000 415.000 417.500 420.000 420.000 421.215 422.876 425.280 429.072 435.942 452.196
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 75 0 54 60 66 66 0 69 0 69 63 72 72 0 0 0 0 0 0 51 69 69 66 0 0 0 0 0 0 72 72 75 72 0 0 0 0 0 0 63 0 0 0 0 60 0 60 0 0 69 60 0 0 0 0 0 63 66 69 75 75 0 0 66 0 0 66 69 0 69 66 0 66 72 0 60 0 63 69 0 0 54 57 63 0 66 69 72 75 0 66 0 66 0 72 63 69 75 72 72 66 72 63 0 72 0 57 57 63 66 69 72 75 63 66 69 69 54 63 66 69 69 66 60 69 69 54 57 60 66 69 72 66 66 69 69 60 63 66 66 63 63 54 63 66 66 60 51 60 63 69 66 66 54 63 60 54 54 57 57 51 48 54 60 54 0 57 54 54 54 51 51 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="152">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.007 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.161 140.0 145.0 150.0 155.0 160.0 162.323 165.0 170.0 175.0 180.0 185.0 188.484 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 333.968 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.414 0.542 0.605 0.625 0.616 0.589 0.541 0.465 0.34 0.298 0.298 0.298 0.298 0.298 0.298 0.298 0.331 0.394 0.456 0.519 0.581 0.625 0.691 0.859 1.021 1.196 1.397 1.629 1.903 2.222 2.589 2.998 3.441 3.907 4.388 4.876 5.37 5.866 6.363 6.861 7.359 7.857 8.352 8.843 9.326 9.795 10.242 10.654 11.01 11.287 11.457 11.5 11.499 11.466 11.39 11.276 11.127 10.95 10.747 10.522 10.28 10.024 9.756 9.48 9.197 8.911 8.623 8.335 8.047 7.763 7.482 7.205 6.934 6.668 6.409 6.156 5.911 5.672 5.441 5.218 5.002 4.793 4.592 4.398 4.211 4.031 3.858 3.692 3.532 3.379 3.232 3.091 2.956 2.826 2.702 2.583 2.47 2.36 2.256 2.156 2.061 1.969 1.882 1.798 1.718 1.642 1.568 1.498 1.432 1.368 1.307 1.248 1.192 1.139 1.088 1.04 0.993 0.949 0.906 0.866 0.827 0.79 0.754 0.721 0.688 0.657 0.628 0.6 0.573 0.547 0.523 0.499 0.477 0.455 0.435 0.416 0.397 0.379 0.362 0.346 0.33 0.315 0.301 0.288 0.275 0.263 0.251 0.24 0.229 0.219 0.209

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.625" PeakHeight="110.0" Num="3" Error="0.0">
-23.945 5.581 -0.629
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.625" EndFrequency="11.5" PeakHeight="333.968" Num="5" zHalfNm="287.773" Error="2.893">
-139.377 -12.306 8.742 -5.282 2.739
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="78.484" Depth="0.327"/>
<TopsideChapman PeakHeight="333.968" PeakDensity="1640818.9" PeakScaleHeight="34.031" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
