<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-24 -055 05:50:00.000"
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 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Moderate F-spread</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" >
2026.02.24 (055) 05:50:00</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">
FF202605502240550009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.182" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.796" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="6.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="320.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="316.300" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="271.162" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.089" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="63.804" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.298" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.879" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="52.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.240" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="92">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.3 2.35 2.4 2.45 2.5 2.55 2.6 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 265.000 265.000 265.000 267.500 270.000 275.000 280.000 285.000 280.000 280.000 283.333 286.667 290.000 290.000 289.000 288.000 287.000 286.000 285.000 290.000 280.000 290.000 290.000 290.000 289.861 289.722 289.583 289.444 289.306 289.167 289.028 288.889 288.750 288.611 288.472 288.333 288.194 288.056 287.917 287.778 287.639 287.500 287.361 287.222 287.083 286.944 286.806 286.667 286.528 286.389 286.250 286.111 285.972 285.833 285.694 285.556 285.417 285.278 285.139 285.000 285.000 286.667 288.333 290.000 292.500 295.000 295.000 300.000 300.000 300.000 305.000 310.000 310.000 312.500 315.000 320.000 320.000 325.000 330.000 335.000 340.000 345.000 350.000 355.000 364.326 376.226 391.937 413.637 445.557 497.144
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 66 0 63 63 0 63 69 66 54 66 69 0 0 66 63 0 0 0 0 60 0 0 57 63 0 0 0 0 0 0 0 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 0 60 0 57 66 0 66 69 69 69 63 72 69 72 0 66 60 57 63 69 69 72 72 72 69 72 66 63 45 0 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 -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 -1.171875 0.390625 0.390625 1.171875 0.390625 2.734375 -1.171875 0.390625 -1.171875 0.390625 -0.390625 0.390625 0.390625 -2.734375 0.390625 2.734375 1.953125 0.390625 -1.953125 -2.734375 -2.734375 2.734375 2.734375 -1.953125 0.390625 -1.953125 -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 -1.171875 -1.171875 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="140">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.167 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.333 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.5 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 316.3 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.333 0.315 0.291 0.258 0.213 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.233 0.254 0.275 0.297 0.318 0.339 0.354 0.374 0.473 0.655 0.907 1.193 1.52 1.915 2.42 3.092 3.916 4.689 5.285 5.728 6.063 6.319 6.514 6.658 6.759 6.822 6.849 6.85 6.843 6.811 6.755 6.68 6.586 6.476 6.353 6.219 6.075 5.924 5.767 5.605 5.44 5.274 5.106 4.939 4.772 4.607 4.444 4.283 4.125 3.971 3.82 3.674 3.531 3.392 3.257 3.126 3.0 2.878 2.76 2.647 2.537 2.431 2.33 2.232 2.138 2.047 1.961 1.877 1.797 1.72 1.647 1.576 1.508 1.443 1.381 1.321 1.264 1.21 1.157 1.107 1.059 1.013 0.969 0.927 0.886 0.848 0.811 0.775 0.742 0.709 0.678 0.649 0.62 0.593 0.567 0.543 0.519 0.496 0.474 0.454 0.434 0.415 0.397 0.379 0.363 0.347 0.332 0.317 0.303 0.29 0.277 0.265 0.254 0.242 0.232 0.222 0.212 0.203

</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="6.85" PeakHeight="316.3" Num="5" zHalfNm="271.162" Error="4.779">
-114.011 28.502 -17.009 7.819 -3.101
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.5" Depth="0.154"/>
<TopsideChapman PeakHeight="316.3" PeakDensity="582165.0" PeakScaleHeight="34.879" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
