<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-04-05 -095 20:30:00.000"
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, F2 cusps do not match</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" >
2026.04.05 (095) 20:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.19" 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">
FF202609504052030009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.679" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.082" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" 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="1.736" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="356.680" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="287.346" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.617" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="97.122" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.242" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.200" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="106.700" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.510" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="184">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 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 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 11.55 11.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
260.000 265.000 265.000 265.000 260.000 260.000 265.000 265.000 265.000 265.000 265.833 266.667 267.500 268.333 269.167 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 275.000 276.000 277.000 278.000 279.000 280.000 285.000 285.000 285.000 285.000 285.000 287.500 290.000 292.500 295.000 292.500 290.000 291.667 293.333 295.000 295.000 295.000 295.000 300.000 301.250 302.500 303.750 305.000 300.000 302.000 304.000 306.000 308.000 310.000 310.000 310.000 310.000 315.000 315.000 316.250 317.500 318.750 320.000 320.000 320.000 320.000 320.000 320.000 320.000 321.667 323.333 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 335.000 335.000 336.250 337.500 338.750 340.000 340.000 345.000 346.250 347.500 348.750 350.000 350.000 350.000 355.000 352.500 350.000 352.500 355.000 357.500 360.000 360.000 362.500 365.000 365.000 365.000 367.500 370.000 370.000 370.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 396.667 398.333 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 420.000 420.000 420.000 420.000 420.000 423.095 426.190 429.286 432.381 435.476 438.571 441.667 444.762 447.857 450.952 454.048 457.143 460.238 463.333 466.429 469.524 472.619 475.714 478.810 481.905 485.000 487.500 490.000 495.000 500.000 507.051 514.817
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 60 60 66 66 66 60 69 66 0 0 0 0 0 48 63 66 66 66 69 63 57 60 66 0 66 66 63 57 60 66 63 0 0 0 0 60 0 0 0 66 72 0 63 45 0 0 72 0 0 0 0 0 69 69 0 54 0 57 63 0 48 0 0 66 69 72 69 54 0 0 0 0 57 63 0 0 0 72 75 0 45 69 0 0 63 0 0 63 69 72 75 0 63 0 69 72 63 0 54 0 63 66 72 60 0 75 54 78 66 75 75 0 69 0 72 51 63 69 75 63 69 72 0 69 69 75 60 60 69 54 60 69 66 75 69 69 69 0 0 60 63 60 63 63 63 63 0 66 0 51 60 60 63 63 51 51 57 54 57 60 0 57 51 0 54 45 48 0 0 0 0 0 45 0 0 48 0 54 54 51 45 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 -1.171875 -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 1.171875 -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 -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 2.734375 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -1.171875 -0.390625 2.734375 1.953125 1.953125 -1.953125 0.390625 -0.390625 -2.734375 -0.390625 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -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" >
89.843 90.0 95.0 100.0 105.0 110.0 115.0 119.736 120.0 125.0 129.472 130.0 135.0 139.208 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 356.68 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.214 1.162 1.504 1.68 1.736 1.7 1.597 1.597 1.597 1.597 1.605 1.676 1.736 1.753 1.856 1.956 2.056 2.157 2.262 2.371 2.486 2.609 2.74 2.882 3.035 3.204 3.389 3.593 3.818 4.066 4.336 4.627 4.934 5.253 5.578 5.904 6.228 6.548 6.862 7.171 7.474 7.772 8.066 8.356 8.642 8.926 9.207 9.487 9.765 10.041 10.315 10.586 10.85 11.1 11.325 11.501 11.593 11.6 11.595 11.569 11.522 11.455 11.371 11.271 11.155 11.027 10.886 10.734 10.574 10.404 10.228 10.046 9.858 9.667 9.472 9.274 9.075 8.874 8.673 8.471 8.271 8.071 7.872 7.675 7.48 7.288 7.097 6.91 6.725 6.544 6.365 6.19 6.018 5.85 5.685 5.524 5.367 5.213 5.062 4.915 4.772 4.632 4.496 4.364 4.234 4.109 3.986 3.867 3.751 3.638 3.528 3.422 3.318 3.218 3.12 3.025 2.933 2.843 2.756 2.672 2.59 2.51 2.433 2.358 2.286 2.215 2.147 2.081 2.016 1.954 1.893 1.835 1.778 1.723 1.669 1.618 1.567 1.519 1.472 1.426 1.381 1.338 1.297 1.256 1.217 1.179 1.143 1.107 1.073 1.039 1.007 0.975 0.945 0.916 0.887 0.859 0.832 0.807 0.781 0.757 0.733 0.71 0.688 0.667 0.646 0.626 0.606 0.587 0.569 0.551 0.534 0.517 0.501 0.485 0.47 0.456 0.441 0.428 0.414 0.401 0.389 0.377 0.365 0.353 0.342 0.332 0.321

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.736" PeakHeight="110.0" Num="3" Error="0.0">
-28.619 10.521 -2.059
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.736" EndFrequency="11.6" PeakHeight="356.68" Num="5" zHalfNm="287.346" Error="4.878">
-175.059 -48.272 12.666 -12.05 5.243
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="29.208" Depth="0.139"/>
<TopsideChapman PeakHeight="356.68" PeakDensity="1669478.9" PeakScaleHeight="49.2" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
