<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-30 -089 19:10:00.000"
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: 85% PACIFIC flags: Multiple candidates for F2x 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" >
2026.03.30 (089) 19:10:00</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">
FF202608903301910009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="13.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.541" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.815" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.000" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="14.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" 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="12.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.647" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="390.878" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="299.879" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.642" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="127.324" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="70.067" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.804" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="149.720" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="195">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55 13.6 13.65 13.7
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 250.000 252.000 254.000 256.000 258.000 260.000 260.000 261.667 263.333 265.000 270.000 270.000 270.000 270.000 270.000 275.000 280.000 280.000 280.000 282.500 285.000 286.000 287.000 288.000 289.000 290.000 295.000 296.429 297.857 299.286 300.714 302.143 303.571 305.000 305.000 307.500 310.000 310.000 310.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 327.500 330.000 332.500 335.000 335.000 335.000 335.000 335.000 338.333 341.667 345.000 346.000 347.000 348.000 349.000 350.000 355.000 356.250 357.500 358.750 360.000 361.250 362.500 363.750 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 397.500 400.000 400.000 400.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 405.000 405.000 415.000 415.000 415.000 415.000 412.500 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 430.000 432.500 435.000 435.000 435.000 435.000 435.000 437.500 440.000 445.000 450.000 451.429 452.857 454.286 455.714 457.143 458.571 460.000 465.000 465.000 465.000 467.500 470.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 505.000 510.000 510.000 515.000 520.000 525.000 530.000 535.000 545.000 550.000 555.000 564.306 575.274 588.393 604.365 624.234 649.622
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 0 57 0 60 60 0 0 54 48 0 60 57 63 0 57 60 57 0 51 0 0 0 0 54 0 0 0 0 0 0 0 66 63 48 69 0 63 69 69 69 72 72 66 69 72 69 0 0 0 69 72 72 72 72 0 0 66 0 0 0 0 69 57 0 0 48 0 0 0 0 57 0 60 69 57 0 66 72 60 63 66 72 72 66 66 69 0 63 66 69 69 69 69 72 69 66 66 69 69 69 63 0 69 66 66 66 63 66 0 63 0 63 63 60 54 51 0 57 57 0 63 60 0 60 60 57 0 0 0 60 57 57 60 60 60 60 57 0 0 0 60 54 0 63 0 60 0 60 0 54 60 57 0 0 0 0 0 0 57 48 54 60 54 60 51 57 60 57 60 57 57 57 54 57 48 54 51 54 54 57 54 54 54 51 54 48 0 48 51 51 48 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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.61 90.0 95.0 100.0 105.0 110.0 114.86 115.0 119.72 120.0 124.58 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 390.878 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.778 2.292 2.561 2.647 2.524 2.524 2.524 2.531 2.647 2.658 2.792 2.928 3.067 3.207 3.351 3.497 3.646 3.798 3.954 4.113 4.276 4.443 4.614 4.789 4.969 5.153 5.342 5.536 5.735 5.939 6.149 6.364 6.585 6.811 7.044 7.282 7.527 7.778 8.035 8.298 8.566 8.841 9.121 9.405 9.694 9.987 10.283 10.58 10.878 11.175 11.468 11.756 12.037 12.306 12.562 12.8 13.018 13.211 13.376 13.51 13.61 13.674 13.699 13.7 13.695 13.677 13.646 13.603 13.548 13.482 13.406 13.32 13.225 13.122 13.011 12.892 12.767 12.637 12.5 12.359 12.212 12.062 11.909 11.752 11.592 11.43 11.266 11.1 10.932 10.764 10.595 10.425 10.255 10.085 9.915 9.746 9.577 9.409 9.242 9.076 8.911 8.747 8.585 8.424 8.265 8.107 7.952 7.798 7.646 7.496 7.348 7.202 7.058 6.916 6.777 6.639 6.504 6.371 6.24 6.111 5.984 5.859 5.737 5.617 5.499 5.383 5.269 5.157 5.048 4.94 4.835 4.731 4.63 4.53 4.433 4.337 4.243 4.151 4.061 3.973 3.886 3.802 3.719 3.638 3.558 3.48 3.404 3.329 3.256 3.184 3.114 3.046 2.978 2.913 2.848 2.785 2.724 2.664 2.605 2.547 2.49 2.435 2.381 2.328 2.276 2.226 2.176 2.128 2.081 2.034 1.989 1.945 1.901 1.859 1.817 1.777 1.737 1.698 1.66 1.623 1.587 1.552 1.517 1.483 1.45 1.417

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.647" PeakHeight="110.0" Num="3" Error="0.0">
-29.868 12.23 -2.752
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.647" EndFrequency="13.7" PeakHeight="390.878" Num="5" zHalfNm="299.879" Error="2.417">
-225.155 -48.554 6.512 0.998 -0.099
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.58" Depth="0.123"/>
<TopsideChapman PeakHeight="390.878" PeakDensity="2328660.0" PeakScaleHeight="68.804" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
