<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 11:10:00.000"
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 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" >
2026.03.30 (089) 11:10:00</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">
FF202608903301110009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.032" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.654" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" 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="10.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="375.000" 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="2.764" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="298.289" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.547" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.078" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="85.613" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.211" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="47.719" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="105.870" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.360" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="139">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 240.000 245.000 245.000 245.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 277.500 280.000 282.500 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.909 286.818 287.727 288.636 289.545 290.455 291.364 292.273 293.182 294.091 295.000 300.000 300.000 301.429 302.857 304.286 305.714 307.143 308.571 310.000 310.000 310.000 310.000 310.000 310.000 310.000 311.667 313.333 315.000 315.000 315.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 395.000 400.000 410.000 415.000 424.840 437.200 453.193 474.695
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 60 45 57 57 54 60 60 57 63 63 60 60 0 60 60 0 57 54 54 57 54 51 48 57 60 57 57 57 0 0 63 60 60 54 0 0 0 57 0 60 60 60 60 0 63 45 0 0 60 0 51 0 0 0 57 0 48 60 60 0 60 0 0 63 0 60 63 66 69 69 69 66 0 0 69 69 69 69 72 72 0 0 0 66 69 69 69 66 66 69 69 60 0 0 66 69 57 0 63 69 69 66 69 63 63 69 57 69 0 66 51 63 57 54 48 51 57 60 57 60 60 57 57 54 57 57 51 54 54 54 51 42 48 0 0 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 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 2.734375 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 -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 2.734375 -0.390625 -1.953125 2.734375 2.734375 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="185">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.587 90.0 95.0 100.0 105.0 110.0 114.3 115.0 118.601 120.0 122.901 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 298.289 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 1.857 2.393 2.674 2.764 2.642 2.642 2.642 2.682 2.764 2.848 3.035 3.212 3.385 3.557 3.73 3.906 4.086 4.271 4.462 4.659 4.865 5.079 5.302 5.535 5.779 6.034 6.301 6.579 6.87 7.173 7.488 7.813 8.147 8.487 8.831 9.175 9.514 9.84 10.148 10.428 10.67 10.867 11.007 11.085 11.1 11.099 11.079 11.038 10.977 10.897 10.801 10.689 10.563 10.425 10.276 10.118 9.951 9.777 9.596 9.411 9.221 9.028 8.833 8.636 8.438 8.239 8.041 7.843 7.646 7.451 7.258 7.066 6.877 6.691 6.508 6.327 6.15 5.976 5.806 5.639 5.476 5.316 5.16 5.007 4.858 4.713 4.572 4.434 4.299 4.169 4.041 3.918 3.797 3.68 3.566 3.456 3.348 3.244 3.143 3.045 2.949 2.857 2.767 2.68 2.595 2.513 2.434 2.357 2.282 2.209 2.139 2.071 2.005 1.942 1.88 1.82 1.762 1.705 1.651 1.598 1.547 1.498 1.45 1.403 1.358 1.315 1.273 1.232 1.192 1.154 1.117 1.081 1.046 1.013 0.98 0.949 0.918 0.889 0.86 0.833 0.806 0.78 0.755 0.731 0.707 0.684 0.662 0.641 0.62 0.6 0.581 0.562 0.544 0.527 0.51 0.493 0.478 0.462 0.447 0.433 0.419 0.405 0.392 0.38 0.368 0.356 0.344 0.333 0.322 0.312 0.302 0.292 0.283 0.274 0.265 0.256 0.248 0.24 0.232 0.225 0.218 0.211 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.764" PeakHeight="110.0" Num="3" Error="0.0">
-29.984 12.395 -2.824
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.764" EndFrequency="11.1" PeakHeight="298.289" Num="5" zHalfNm="235.547" Error="2.058">
-143.931 -36.207 2.56 1.655 0.535
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.901" Depth="0.122"/>
<TopsideChapman PeakHeight="298.289" PeakDensity="1528660.0" PeakScaleHeight="47.719" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
