<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-26 -057 10:10:00.000"
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: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.02.26 (057) 10:10:00</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">
FF202605702261010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.176" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.537" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.800" 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="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="350.000" 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="2.203" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="278.842" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.845" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.305" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="77.876" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="20.003" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="42.787" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="79.030" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="126">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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" >
240.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 250.000 252.500 255.000 255.000 255.000 250.000 250.000 250.000 250.000 250.000 250.000 251.667 253.333 255.000 255.000 255.000 255.000 255.000 255.000 255.000 256.667 258.333 260.000 260.000 260.000 260.000 265.000 260.000 261.250 262.500 263.750 265.000 265.000 266.667 268.333 270.000 270.000 270.000 271.667 273.333 275.000 275.833 276.667 277.500 278.333 279.167 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 340.000 340.000 345.000 350.000 350.000 355.000 360.000 365.000 365.000 372.628 383.165 398.664 423.715 471.076
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 0 60 60 66 69 69 66 69 75 75 72 72 66 66 66 66 0 60 0 0 0 66 72 0 60 66 0 66 63 60 60 57 51 0 0 63 60 54 0 57 54 45 45 0 0 0 63 63 66 60 0 0 0 72 75 0 0 84 81 81 0 0 69 0 66 0 0 0 66 0 66 78 57 63 0 66 0 72 66 72 63 69 63 54 60 60 66 66 78 81 66 54 78 78 75 75 78 69 72 75 66 69 66 57 63 63 69 66 66 66 63 72 69 69 72 63 66 66 66 60 69 63 63 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 -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 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 -1.953125 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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="162">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.707 90.0 95.0 100.0 105.0 110.0 115.0 117.113 120.0 124.227 125.0 130.0 131.34 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 278.842 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.225 1.478 1.908 2.132 2.203 2.14 2.074 2.074 2.074 2.088 2.179 2.203 2.319 2.466 2.609 2.753 2.902 3.056 3.22 3.395 3.584 3.789 4.015 4.265 4.543 4.85 5.189 5.556 5.946 6.347 6.748 7.14 7.513 7.862 8.181 8.469 8.72 8.931 9.098 9.216 9.284 9.3 9.299 9.282 9.242 9.181 9.101 9.005 8.893 8.768 8.631 8.483 8.327 8.164 7.994 7.819 7.641 7.459 7.275 7.09 6.905 6.719 6.535 6.351 6.169 5.989 5.812 5.637 5.466 5.297 5.132 4.97 4.812 4.657 4.506 4.359 4.216 4.077 3.941 3.809 3.681 3.557 3.436 3.319 3.206 3.096 2.989 2.886 2.786 2.689 2.596 2.505 2.418 2.333 2.251 2.172 2.096 2.022 1.951 1.882 1.816 1.751 1.689 1.629 1.572 1.516 1.462 1.41 1.36 1.311 1.265 1.22 1.176 1.134 1.094 1.055 1.017 0.981 0.946 0.912 0.879 0.848 0.818 0.788 0.76 0.733 0.707 0.681 0.657 0.634 0.611 0.589 0.568 0.548 0.528 0.509 0.491 0.473 0.456 0.44 0.424 0.409 0.394 0.38 0.367 0.353 0.341 0.329 0.317 0.305 0.294 0.284 0.274 0.264 0.254 0.245 0.237 0.228 0.22 0.212 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.203" PeakHeight="110.0" Num="3" Error="0.0">
-29.357 11.511 -2.447
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.203" EndFrequency="9.3" PeakHeight="278.842" Num="5" zHalfNm="222.845" Error="2.562">
-125.757 -18.483 -5.261 0.468 1.531
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="21.34" Depth="0.129"/>
<TopsideChapman PeakHeight="278.842" PeakDensity="1073076.9" PeakScaleHeight="42.787" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
