<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-22 -081 12:30:00.000"
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: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.03.22 (081) 12:30:00</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">
FF202608103221230009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.888" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.772" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.144" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.245" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="312.059" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="236.288" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.211" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="101.529" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.784" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.366" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="125.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.420" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="131">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
230.000 235.000 240.000 245.000 245.000 250.000 255.000 260.000 262.500 265.000 265.000 270.000 275.000 275.000 275.000 280.000 280.000 282.500 285.000 285.000 285.000 290.000 290.000 285.000 287.500 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 296.667 298.333 300.000 301.667 303.333 305.000 300.000 300.000 305.000 310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 316.875 318.750 320.625 322.500 324.375 326.250 328.125 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 342.500 345.000 345.000 345.000 345.000 345.000 350.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 362.500 365.000 365.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 413.702 417.906 422.722 428.293 434.812 442.545 451.865 463.315 477.722 496.398 521.574
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 0 45 51 51 51 48 0 54 51 0 54 54 0 54 48 0 51 54 51 48 54 48 0 60 0 60 0 0 60 0 60 60 63 0 57 0 60 57 57 0 0 0 0 0 63 66 60 0 57 63 66 48 66 69 60 0 63 66 66 0 0 63 0 54 0 0 51 54 63 45 54 60 60 63 54 0 60 51 57 57 60 48 60 0 51 0 57 66 0 57 63 0 48 57 63 0 63 63 60 54 54 0 63 60 60 48 54 60 54 57 48 54 54 54 51 51 51 48 48 45 48 0 0 45 45 0 0 0 42
</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 -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 -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 -1.953125 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 -1.171875 0.390625 -0.390625 -0.390625 -1.171875 -2.734375 -0.390625 -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" >
89.521 90.0 95.0 100.0 105.0 110.0 112.582 115.0 115.163 117.745 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 312.059 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.114 2.721 3.042 3.144 3.022 3.022 3.022 3.144 3.23 3.405 3.567 3.724 3.878 4.032 4.187 4.344 4.505 4.67 4.84 5.016 5.197 5.385 5.581 5.784 5.995 6.215 6.443 6.68 6.926 7.179 7.44 7.708 7.982 8.26 8.54 8.822 9.101 9.377 9.645 9.902 10.144 10.367 10.565 10.732 10.863 10.952 10.996 11.0 10.997 10.98 10.948 10.902 10.843 10.772 10.689 10.596 10.494 10.383 10.264 10.138 10.006 9.868 9.725 9.578 9.427 9.272 9.115 8.956 8.795 8.633 8.47 8.307 8.143 7.98 7.816 7.654 7.492 7.332 7.173 7.015 6.859 6.705 6.552 6.402 6.254 6.108 5.964 5.823 5.684 5.547 5.413 5.281 5.152 5.025 4.901 4.779 4.66 4.543 4.429 4.317 4.208 4.101 3.997 3.895 3.795 3.697 3.602 3.509 3.418 3.33 3.243 3.159 3.077 2.996 2.918 2.842 2.767 2.694 2.624 2.555 2.487 2.422 2.358 2.295 2.235 2.176 2.118 2.062 2.007 1.954 1.902 1.851 1.802 1.754 1.707 1.662 1.618 1.575 1.533 1.492 1.452 1.413 1.375 1.339 1.303 1.268 1.234 1.201 1.169 1.138 1.107 1.078 1.049 1.021 0.993 0.967 0.941 0.916 0.891 0.867 0.844 0.821 0.799 0.778 0.757 0.737 0.717 0.698 0.679 0.661 0.643 0.626 0.609 0.593 0.577 0.561 0.546 0.531 0.517 0.503 0.49 0.477 0.464 0.451 0.439 0.427

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.144" PeakHeight="110.0" Num="3" Error="0.0">
-30.313 12.875 -3.041
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.144" EndFrequency="11.0" PeakHeight="312.059" Num="5" zHalfNm="236.288" Error="3.061">
-160.596 -38.629 2.682 1.221 1.008
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.745" Depth="0.122"/>
<TopsideChapman PeakHeight="312.059" PeakDensity="1501240.8" PeakScaleHeight="57.366" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
