<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 08:10:00.000"
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="14.0">
<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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, 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" >
2026.10.24 (297) 08:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" 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">
FF202629710240810009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.076" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.765" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="4.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="340.000" 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="0.605" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="1.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="309.063" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.782" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.171" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="82.748" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.250" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.960" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="76.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.740" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="67">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.5 1.55 1.6 1.65 1.7 1.75 1.8 1.85 1.9 1.95 2.0 2.05 2.1 2.15 2.2 2.25 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 250.000 250.000 251.000 252.000 253.000 254.000 255.000 256.000 257.000 258.000 259.000 260.000 261.000 262.000 263.000 264.000 265.000 266.000 267.000 268.000 269.000 270.000 271.000 272.000 273.000 274.000 275.000 276.000 277.000 278.000 279.000 280.000 280.000 285.000 285.000 290.000 290.000 290.000 295.000 300.000 300.000 305.000 305.000 310.000 310.000 315.000 320.000 320.000 325.000 330.000 330.000 335.000 340.000 350.000 355.000 365.000 375.000 385.000 400.000 420.000 434.777 451.045
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 66 75 75 78 72 69 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="152">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.084 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 136.467 140.0 145.0 150.0 155.0 160.0 162.935 165.0 170.0 175.0 180.0 185.0 189.402 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 309.063 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.401 0.524 0.586 0.605 0.597 0.57 0.524 0.452 0.334 0.282 0.282 0.282 0.282 0.282 0.282 0.282 0.307 0.368 0.429 0.49 0.551 0.605 0.621 0.752 0.888 1.04 1.217 1.424 1.664 1.935 2.227 2.526 2.819 3.097 3.356 3.593 3.809 4.003 4.175 4.325 4.455 4.564 4.652 4.719 4.767 4.793 4.8 4.8 4.792 4.773 4.743 4.704 4.657 4.603 4.541 4.474 4.401 4.324 4.243 4.159 4.072 3.983 3.892 3.8 3.708 3.614 3.521 3.428 3.336 3.244 3.153 3.063 2.974 2.887 2.801 2.716 2.634 2.553 2.474 2.396 2.32 2.247 2.175 2.105 2.037 1.97 1.906 1.843 1.782 1.723 1.666 1.61 1.556 1.504 1.453 1.404 1.357 1.311 1.266 1.223 1.181 1.141 1.102 1.064 1.028 0.992 0.958 0.925 0.893 0.863 0.833 0.804 0.776 0.749 0.723 0.698 0.674 0.651 0.628 0.606 0.585 0.565 0.545 0.526 0.508 0.49 0.473 0.457 0.441 0.426 0.411 0.397 0.383 0.369 0.357 0.344 0.332 0.321 0.309 0.299 0.288 0.278 0.268 0.259 0.25 0.241 0.233 0.225 0.217 0.209 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.605" PeakHeight="110.0" Num="3" Error="0.0">
-23.728 5.405 -0.593
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.605" EndFrequency="4.8" PeakHeight="309.063" Num="5" zHalfNm="250.782" Error="3.098">
-131.904 17.418 -6.559 0.901 0.483
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="79.402" Depth="0.323"/>
<TopsideChapman PeakHeight="309.063" PeakDensity="285856.1" PeakScaleHeight="43.96" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
