<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-25 -056 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" >
2026.02.25 (056) 20:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202605602252050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.305" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.439" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="400.000" 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="1.608" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="444.554" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="282.027" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.282" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="227.657" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="53.383" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="119.204" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="226.190" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.000 275.000 275.000 275.000 275.833 276.667 277.500 278.333 279.167 280.000 285.000 285.000 285.000 285.000 285.000 285.000 288.333 291.667 295.000 295.000 295.000 295.000 295.000 296.667 298.333 300.000 305.000 307.500 310.000 310.000 315.000 315.000 315.000 315.000 317.500 320.000 320.000 321.667 323.333 325.000 325.000 335.000 335.000 336.667 338.333 340.000 340.000 345.000 345.000 345.000 347.500 350.000 352.500 355.000 357.500 360.000 362.500 365.000 370.000 375.000 375.000 380.000 380.000 380.000 390.000 390.000 395.000 395.000 400.000 400.000 410.000 410.000 415.000 420.000 425.000 430.000 435.000 440.000 445.000 455.000 460.000 465.000 470.000 475.000 480.000 485.000 490.000 490.000 500.000 500.000 510.000 510.000 520.000 525.000 530.000 535.000 545.000 550.000 555.000 565.000 570.000 580.000 590.000 600.000 610.000 625.000 635.000 650.000 665.000 670.000 695.000 715.000 740.000 760.000 791.414 828.960 874.628
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 63 63 0 57 0 0 0 54 0 54 51 0 0 0 57 45 0 0 57 0 0 0 0 0 0 54 60 0 57 60 45 0 57 60 0 63 60 0 0 57 0 51 48 0 0 60 60 54 63 63 0 66 0 57 0 69 0 69 69 63 72 60 66 57 57 66 60 63 63 57 60 60 57 63 60 0 0 0 60 54 57 57 54 54 60 63 63 63 60 54 60 60 60 57 57 54 60 57 57 57 60 66 60 60 60 60 57 57 63 66 57 57 57 57 51 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -0.390625 -1.953125 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 2.734375 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 -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 2.734375 2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 1.171875 -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" >
89.891 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.54 125.0 130.0 131.079 135.0 140.0 141.619 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 444.554 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.209 1.075 1.393 1.556 1.608 1.577 1.48 1.465 1.465 1.465 1.465 1.518 1.586 1.608 1.679 1.781 1.883 1.989 2.1 2.218 2.346 2.486 2.64 2.81 3.0 3.208 3.435 3.676 3.924 4.172 4.416 4.651 4.876 5.091 5.297 5.493 5.68 5.86 6.033 6.199 6.36 6.515 6.665 6.81 6.951 7.088 7.221 7.351 7.476 7.599 7.717 7.832 7.944 8.052 8.157 8.258 8.355 8.449 8.539 8.625 8.707 8.784 8.857 8.925 8.988 9.046 9.098 9.145 9.186 9.221 9.25 9.272 9.288 9.297 9.3 9.3 9.298 9.293 9.285 9.274 9.26 9.244 9.225 9.203 9.179 9.152 9.123 9.092 9.058 9.023 8.985 8.946 8.905 8.862 8.817 8.771 8.723 8.673 8.623 8.571 8.518 8.463 8.408 8.351 8.294 8.235 8.176 8.116 8.055 7.993 7.931 7.868 7.805 7.741 7.677 7.612 7.547 7.482 7.416 7.35 7.284 7.218 7.151 7.085 7.018 6.952 6.885 6.818 6.752 6.685 6.619 6.553 6.487 6.421 6.355 6.29 6.224 6.159 6.095 6.03 5.966 5.902 5.839 5.775 5.713 5.65 5.588 5.526 5.465 5.404 5.344 5.284 5.224 5.165 5.106 5.048 4.99 4.933 4.876 4.819 4.763 4.708 4.653 4.598 4.544 4.491 4.438 4.385 4.333 4.281 4.23 4.18 4.13 4.08 4.031 3.982 3.934 3.886 3.839 3.792 3.746 3.7 3.655 3.61 3.566 3.522 3.479

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.608" PeakHeight="110.0" Num="3" Error="0.0">
-28.364 10.192 -1.937
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.608" EndFrequency="9.3" PeakHeight="444.554" Num="5" zHalfNm="282.027" Error="6.502">
-331.018 34.5 -0.214 -10.761 4.558
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="31.619" Depth="0.143"/>
<TopsideChapman PeakHeight="444.554" PeakDensity="1073076.9" PeakScaleHeight="119.204" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
