<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 20:50:00.000"
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: 95% PACIFIC flags: Multiple candidates for F2x cusp</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" >
2026.03.11 (070) 20:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202607003112050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="10.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.571" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.997" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.850" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="470.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.531" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="376.738" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="286.770" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.523" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="126.920" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.583" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.451" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="133.590" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.750" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="157">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 265.000 262.500 260.000 261.250 262.500 263.750 265.000 266.250 267.500 268.750 268.958 269.167 269.375 269.583 269.792 270.000 275.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 285.000 285.000 285.000 280.000 280.000 281.250 282.500 283.750 285.000 290.000 291.000 292.000 293.000 294.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 302.500 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 310.000 312.500 315.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 327.500 330.000 330.000 330.000 330.000 335.000 337.500 340.000 340.000 340.000 340.000 341.667 343.333 345.000 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 366.667 368.333 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 445.000 450.000 455.000 455.000 457.500 460.000 465.000 467.500 470.000 475.000 480.000 485.000 490.000 495.000 500.000 505.000 510.000 515.000 525.000 530.000 538.674 548.298 559.039 571.101 584.746 600.306
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 60 0 60 0 0 0 0 0 0 0 0 0 0 0 0 66 66 66 66 0 63 60 57 60 0 0 0 63 60 0 69 0 63 0 0 0 0 0 66 66 66 63 66 66 66 66 0 0 0 60 63 63 0 0 63 0 0 0 63 66 69 0 63 0 69 0 66 66 0 69 66 0 60 66 69 69 0 48 72 63 0 0 72 69 69 60 66 69 72 66 0 0 69 72 63 72 75 66 72 60 66 72 63 69 75 66 69 60 66 72 63 69 69 66 69 63 69 60 66 57 66 54 63 69 63 69 63 54 66 66 66 60 66 0 66 63 0 63 60 63 60 0 0 57 57 57 57 51 51 51 48 48 48 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 -1.171875 -0.390625 -0.390625 -1.171875 -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 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 1.953125 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 2.734375 0.390625
</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" >
89.923 90.0 95.0 100.0 105.0 110.0 115.0 120.0 121.052 125.0 130.0 132.104 135.0 140.0 143.156 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 376.738 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.207 1.023 1.326 1.482 1.531 1.502 1.413 1.386 1.386 1.386 1.386 1.424 1.49 1.531 1.578 1.698 1.814 1.932 2.053 2.179 2.312 2.454 2.606 2.77 2.946 3.137 3.342 3.561 3.793 4.037 4.29 4.548 4.811 5.075 5.338 5.6 5.859 6.114 6.367 6.616 6.861 7.103 7.341 7.576 7.808 8.036 8.261 8.483 8.7 8.913 9.122 9.324 9.519 9.705 9.88 10.042 10.185 10.307 10.402 10.467 10.498 10.5 10.497 10.484 10.46 10.425 10.38 10.326 10.264 10.193 10.115 10.03 9.938 9.841 9.738 9.63 9.518 9.402 9.282 9.159 9.033 8.905 8.774 8.642 8.508 8.374 8.238 8.102 7.965 7.828 7.691 7.554 7.418 7.282 7.147 7.013 6.879 6.747 6.616 6.486 6.358 6.231 6.105 5.981 5.859 5.738 5.619 5.501 5.386 5.272 5.16 5.05 4.941 4.835 4.73 4.627 4.526 4.427 4.33 4.234 4.14 4.048 3.958 3.87 3.783 3.698 3.615 3.534 3.454 3.376 3.299 3.224 3.151 3.079 3.008 2.939 2.872 2.806 2.742 2.679 2.617 2.557 2.498 2.44 2.383 2.328 2.274 2.222 2.17 2.12 2.07 2.022 1.975 1.929 1.884 1.84 1.797 1.755 1.714 1.674 1.635 1.597 1.56 1.523 1.487 1.453 1.419 1.385 1.353 1.321 1.29 1.26 1.23 1.201 1.173 1.146 1.119 1.092 1.067 1.042 1.017 0.993 0.97 0.947 0.925 0.903 0.882

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.531" PeakHeight="110.0" Num="3" Error="0.0">
-28.193 9.976 -1.86
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.531" EndFrequency="10.5" PeakHeight="376.738" Num="5" zHalfNm="286.77" Error="5.359">
-214.979 -24.882 11.183 -8.619 3.715
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="33.156" Depth="0.145"/>
<TopsideChapman PeakHeight="376.738" PeakDensity="1367866.0" PeakScaleHeight="65.451" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
