<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-23 -054 23:50:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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) 23:50:00</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">
FF202605402232350009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.957" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.028" 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="7.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="88" Val="7.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="416.667" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="359.634" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="321.270" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.964" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="57.159" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.615" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="28.679" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="61.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 322.500 320.000 315.000 315.000 315.000 312.500 310.000 310.000 310.000 312.500 315.000 310.000 310.000 315.000 320.000 330.000 345.000 335.000 335.000 325.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 335.000 335.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 372.500 375.000 375.000 375.000 375.000 375.000 375.000 375.000 377.500 380.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 390.000 392.500 395.000 398.000 401.000 404.000 407.000 410.000 411.667 413.333 415.000 416.667 418.333 422.590 509.513
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 60 66 0 60 0 63 54 54 0 63 54 51 0 60 66 63 69 66 63 63 63 0 0 0 60 60 63 0 0 0 0 72 0 0 66 63 0 63 69 66 60 63 60 0 0 57 0 66 69 0 60 63 60 51 54 57 54 0 66 63 69 0 60 60 0 0 0 0 0 0 0 63 54 63 66 63 0 0 57 63 60 63 57 0 60 60 60 57 0 0 0 0 0 57 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 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 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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 1.953125 -1.171875 -0.390625 -1.953125 0.390625 0.390625 -2.734375 1.171875 1.953125 1.171875 0.390625 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -0.390625 -1.171875 1.953125 0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 1.953125 2.734375 -0.390625 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="134">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.316 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.633 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.949 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 359.634 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.313 0.287 0.252 0.204 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.219 0.241 0.263 0.284 0.306 0.328 0.35 0.354 0.421 0.519 0.634 0.766 0.914 1.077 1.255 1.448 1.654 1.873 2.106 2.352 2.612 2.885 3.171 3.472 3.786 4.114 4.456 4.809 5.174 5.546 5.922 6.293 6.648 6.967 7.227 7.396 7.45 7.45 7.426 7.362 7.265 7.139 6.988 6.817 6.629 6.43 6.22 6.005 5.785 5.564 5.342 5.122 4.905 4.691 4.483 4.279 4.082 3.89 3.705 3.527 3.356 3.191 3.033 2.882 2.737 2.599 2.467 2.342 2.222 2.108 1.999 1.896 1.798 1.704 1.615 1.531 1.451 1.375 1.303 1.235 1.17 1.108 1.05 0.995 0.942 0.893 0.846 0.801 0.759 0.719 0.681 0.645 0.61 0.578 0.548 0.519 0.491 0.465 0.441 0.417 0.395 0.374 0.354 0.336 0.318 0.301 0.285 0.27 0.256 0.242 0.229 0.217 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="7.45" PeakHeight="359.634" Num="5" zHalfNm="321.27" Error="1.834">
-130.775 -21.486 11.429 -3.161 0.308
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="105.949" Depth="0.154"/>
<TopsideChapman PeakHeight="359.634" PeakDensity="688616.6" PeakScaleHeight="28.679" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
