<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-22 -053 13:20:00.000"
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" >
2026.02.22 (053) 13:20:00</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">
FF202605302221320009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.368" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.394" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.550" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.550" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="225.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="225.000" 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="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="575.000" 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="3.269" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.550" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.550" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.304" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="382.854" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="256.691" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.122" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="158.659" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="50.214" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="87.327" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="207.890" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="116">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 230.000 235.000 240.000 245.000 250.000 255.000 265.000 272.500 280.000 287.500 295.000 300.000 303.750 307.500 311.250 315.000 315.000 317.500 320.000 322.500 325.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 335.000 337.500 340.000 340.000 345.000 345.000 347.500 350.000 352.000 354.000 356.000 358.000 360.000 360.000 360.000 362.500 365.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 405.000 405.000 405.000 410.000 415.000 420.000 420.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 465.000 470.000 475.000 475.000 480.000 485.000 490.000 495.000 500.000 500.000 505.000 510.000 515.000 515.000 520.000 520.000 525.000 525.000 527.500 530.000 535.000 535.000 540.000 545.000 545.000 550.000 550.000 555.000 555.000 560.000 565.000 570.000 575.000 575.000 580.000 590.000 595.000 600.000 610.000 620.000 634.275 652.489
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 48 48 0 0 51 51 0 0 0 54 45 0 0 0 48 48 0 51 48 54 54 0 54 54 57 57 54 0 54 0 54 57 0 57 0 54 0 0 0 0 48 54 60 0 57 51 57 48 57 48 57 48 57 51 60 54 60 60 54 60 60 60 60 63 60 60 57 57 60 60 63 60 57 57 54 57 57 60 60 60 60 60 63 60 54 60 54 60 51 60 54 63 54 60 54 45 54 48 57 54 57 54 54 51 51 51 48 48 51 48 48 42 45 42
</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 -1.953125 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 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" >
89.502 90.0 95.0 100.0 105.0 110.0 112.054 114.107 115.0 116.161 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 382.854 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.199 2.829 3.163 3.269 3.147 3.147 3.2 3.269 3.362 3.484 3.607 3.732 3.859 3.99 4.124 4.262 4.403 4.548 4.697 4.848 5.001 5.155 5.311 5.467 5.622 5.777 5.931 6.083 6.234 6.383 6.53 6.675 6.818 6.959 7.099 7.237 7.373 7.508 7.642 7.774 7.906 8.036 8.166 8.295 8.423 8.551 8.679 8.807 8.934 9.061 9.189 9.316 9.443 9.57 9.696 9.821 9.942 10.057 10.161 10.243 10.292 10.3 10.299 10.293 10.281 10.263 10.239 10.209 10.174 10.134 10.09 10.041 9.987 9.929 9.868 9.803 9.734 9.662 9.587 9.51 9.429 9.347 9.262 9.175 9.086 8.996 8.904 8.81 8.715 8.619 8.522 8.425 8.326 8.227 8.127 8.027 7.927 7.826 7.726 7.625 7.524 7.424 7.324 7.224 7.124 7.024 6.926 6.827 6.729 6.632 6.536 6.44 6.344 6.25 6.156 6.063 5.971 5.88 5.79 5.7 5.612 5.524 5.438 5.352 5.268 5.184 5.101 5.02 4.939 4.859 4.781 4.703 4.626 4.551 4.476 4.403 4.33 4.258 4.188 4.118 4.05 3.982 3.916 3.85 3.785 3.722 3.659 3.597 3.536 3.476 3.417 3.359 3.302 3.246 3.19 3.136 3.082 3.029 2.977 2.926 2.876 2.826 2.777 2.729 2.682 2.636 2.59 2.545 2.501 2.458 2.415 2.373 2.332 2.291 2.251 2.212 2.174 2.136 2.098 2.062 2.026 1.99 1.955 1.921 1.888 1.855

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.269" PeakHeight="110.0" Num="3" Error="0.0">
-30.411 13.019 -3.106
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.269" EndFrequency="10.3" PeakHeight="382.854" Num="5" zHalfNm="256.691" Error="6.007">
-222.175 -65.719 31.055 -12.723 2.869
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.161" Depth="0.122"/>
<TopsideChapman PeakHeight="382.854" PeakDensity="1316253.1" PeakScaleHeight="87.327" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
