<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-20 -079 20:10:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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) 20:10:00</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">
FF202607903202010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.824" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.331" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="11.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="441.189" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.121" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="339.213" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="276.273" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.686" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="86.718" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.088" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.293" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="106.340" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="170">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 245.000 265.000 265.000 250.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 287.500 285.000 285.000 287.500 290.000 290.000 290.000 290.000 290.000 292.500 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 300.000 302.500 305.000 305.000 310.000 312.500 315.000 310.000 315.000 315.000 315.000 315.000 316.667 318.333 320.000 320.000 325.000 325.000 327.500 330.000 330.833 331.667 332.500 333.333 334.167 335.000 337.500 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 355.000 356.250 357.500 358.750 360.000 360.000 362.500 365.000 365.000 365.000 367.500 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 391.429 392.857 394.286 395.714 397.143 398.571 400.000 405.000 407.500 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 421.250 422.500 423.750 425.000 427.500 430.000 432.500 435.051 437.926 441.189 444.926 449.248 454.304 460.299 467.519 476.385 487.531
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 48 57 60 60 66 63 60 0 69 63 60 0 63 60 60 60 60 0 0 57 60 66 69 69 66 0 0 0 0 0 66 0 0 66 0 0 69 63 0 66 0 66 0 63 0 69 0 66 66 0 69 69 66 63 0 69 69 60 0 51 66 60 63 69 69 0 0 69 72 63 66 0 60 0 69 0 63 0 69 57 66 69 57 0 66 69 57 0 69 54 60 63 0 60 0 69 75 0 66 69 72 0 63 69 72 72 69 66 69 72 69 69 63 0 72 72 69 66 0 57 69 69 69 66 69 69 0 63 0 66 0 0 0 0 66 57 0 51 54 0 60 63 57 60 60 60 60 0 42 57 48 54 0 54 54 54 54 0 51 0 48 51 54 51 48 45 0
</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="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.728 90.0 95.0 100.0 105.0 110.0 115.0 117.55 120.0 125.0 125.099 130.0 132.649 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 339.213 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.223 1.422 1.837 2.053 2.121 2.065 1.991 1.991 1.991 1.991 2.075 2.121 2.175 2.289 2.404 2.522 2.644 2.771 2.903 3.043 3.19 3.346 3.512 3.687 3.874 4.072 4.281 4.502 4.735 4.977 5.23 5.49 5.757 6.03 6.307 6.588 6.871 7.157 7.444 7.733 8.022 8.314 8.606 8.9 9.196 9.494 9.793 10.094 10.393 10.688 10.97 11.219 11.396 11.45 11.45 11.432 11.39 11.324 11.237 11.131 11.008 10.869 10.716 10.552 10.376 10.191 9.999 9.8 9.596 9.388 9.176 8.962 8.747 8.532 8.316 8.101 7.887 7.675 7.465 7.257 7.052 6.851 6.652 6.458 6.266 6.079 5.896 5.717 5.542 5.371 5.204 5.041 4.883 4.728 4.578 4.432 4.29 4.152 4.018 3.888 3.762 3.64 3.521 3.405 3.294 3.185 3.08 2.978 2.88 2.785 2.692 2.603 2.516 2.432 2.351 2.272 2.196 2.123 2.052 1.983 1.917 1.852 1.79 1.73 1.672 1.615 1.561 1.508 1.458 1.408 1.361 1.315 1.271 1.228 1.186 1.146 1.107 1.07 1.034 0.999 0.965 0.932 0.901 0.87 0.841 0.812 0.785 0.758 0.733 0.708 0.684 0.661 0.638 0.617 0.596 0.576 0.556 0.537 0.519 0.502 0.485 0.468 0.452 0.437 0.422 0.408 0.394 0.381 0.368 0.355 0.343 0.332 0.32 0.31 0.299 0.289 0.279 0.27 0.26 0.252 0.243 0.235 0.227 0.219 0.212 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.121" PeakHeight="110.0" Num="3" Error="0.0">
-29.245 11.357 -2.384
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.121" EndFrequency="11.45" PeakHeight="339.213" Num="5" zHalfNm="276.273" Error="3.054">
-158.885 -56.635 13.717 -7.354 2.593
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.649" Depth="0.13"/>
<TopsideChapman PeakHeight="339.213" PeakDensity="1626581.9" PeakScaleHeight="45.293" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
