<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-23 -054 09:50:00.000"
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" >
2026.02.23 (054) 09:50:00</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">
FF202605402230950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.193" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.384" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.650" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="240.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="240.000" 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="7.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="330.000" 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="1.941" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="288.847" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.127" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="5.827" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="95.835" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.800" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.464" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="77.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.460" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 260.000 260.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 265.000 262.500 260.000 265.000 265.500 266.000 266.500 267.000 267.500 268.000 268.500 269.000 269.500 270.000 275.000 275.000 275.000 276.667 278.333 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 295.000 295.000 295.000 300.000 300.000 300.000 305.000 305.000 305.000 310.000 315.000 315.000 320.000 320.000 325.000 325.000 330.000 330.000 340.000 340.000 345.000 350.575 357.375 365.855 376.724 391.158 411.254 441.158 490.366 586.483
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 54 0 0 60 48 0 48 0 0 57 57 54 54 57 60 60 0 0 60 60 57 57 57 57 57 0 0 0 0 0 66 63 63 60 57 0 54 66 69 0 69 0 66 66 0 0 69 0 0 0 0 0 0 0 0 54 0 0 66 45 0 0 0 66 66 51 69 63 0 0 69 69 66 0 69 63 69 69 63 69 69 66 69 69 69 63 69 63 72 69 69 69 69 66 66 69 69 66 66 66 66 63 63 54 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</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" >
89.777 90.0 95.0 100.0 105.0 110.0 115.0 118.539 120.0 125.0 127.077 130.0 135.0 135.616 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 288.847 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.219 1.3 1.681 1.878 1.941 1.896 1.807 1.807 1.807 1.807 1.853 1.931 1.941 2.064 2.195 2.324 2.453 2.585 2.722 2.866 3.019 3.184 3.363 3.559 3.779 4.027 4.312 4.64 5.018 5.438 5.867 6.268 6.615 6.906 7.145 7.342 7.503 7.634 7.738 7.82 7.881 7.922 7.945 7.95 7.95 7.94 7.918 7.884 7.839 7.784 7.719 7.646 7.565 7.477 7.383 7.283 7.179 7.069 6.956 6.84 6.721 6.599 6.476 6.351 6.226 6.099 5.972 5.845 5.719 5.592 5.467 5.342 5.218 5.095 4.974 4.854 4.736 4.62 4.505 4.392 4.281 4.172 4.065 3.96 3.857 3.756 3.657 3.56 3.465 3.373 3.282 3.194 3.107 3.023 2.941 2.86 2.782 2.705 2.631 2.558 2.487 2.418 2.351 2.285 2.221 2.159 2.099 2.04 1.982 1.927 1.872 1.819 1.768 1.718 1.669 1.622 1.576 1.531 1.488 1.445 1.404 1.364 1.325 1.288 1.251 1.215 1.18 1.147 1.114 1.082 1.051 1.021 0.992 0.963 0.936 0.909 0.883 0.858 0.833 0.809 0.786 0.763 0.741 0.72 0.699 0.679 0.66 0.641 0.622 0.605 0.587 0.57 0.554 0.538 0.522 0.507 0.493 0.479 0.465 0.452 0.439 0.426 0.414 0.402 0.39 0.379 0.368 0.357 0.347 0.337 0.328 0.318 0.309 0.3 0.291 0.283 0.275 0.267 0.259 0.252 0.245 0.237 0.231 0.224 0.218 0.211 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.941" PeakHeight="110.0" Num="3" Error="0.0">
-28.975 10.992 -2.24
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.941" EndFrequency="7.95" PeakHeight="288.847" Num="5" zHalfNm="222.127" Error="3.798">
-146.973 5.655 -18.478 6.425 0.14
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.616" Depth="0.134"/>
<TopsideChapman PeakHeight="288.847" PeakDensity="784150.1" PeakScaleHeight="53.464" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
