<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 00:00:00.000"
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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Severe F-spread, F2x cusp not found, Multiple candidates for F2o cusp, F2 cusps do not match</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) 00:00:00</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">
FF202629710240000009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.847" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.789" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="365.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="365.000" 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="6.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="386.802" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="346.663" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.582" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="60.687" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.988" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.950" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="69.920" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.270" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="73">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
385.000 385.000 385.000 385.000 385.000 382.500 380.000 377.500 375.000 370.000 365.000 367.500 370.000 372.500 375.000 377.500 380.000 382.500 385.000 385.000 388.333 391.667 395.000 403.333 411.667 420.000 419.242 418.485 417.727 416.970 416.212 415.455 414.697 413.939 413.182 412.424 411.667 410.909 410.152 409.394 408.636 407.879 407.121 406.364 405.606 404.848 404.091 403.333 402.576 401.818 401.061 400.303 399.545 398.788 398.030 397.273 396.515 395.758 395.000 395.000 400.000 406.250 412.500 418.750 425.000 426.667 428.333 430.000 439.256 451.475 468.353 493.180 533.303
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 66 0 63 66 60 0 0 57 0 60 0 0 0 0 0 63 0 0 63 60 63 60 0 57 0 57 0 0 0 0 0 0 0 0 57 0 0 0 0 60 0 57 0 0 0 0 0 60 0 60 60 0 0 0 0 0 0 66 63 57 0 0 57 0 57 51 0 0 54 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -0.390625 1.953125 -1.171875 0.390625 1.171875 1.171875 0.390625 -0.390625 0.390625 1.171875 1.953125 1.953125 0.390625 -0.390625 -0.390625 -0.390625 1.953125 -0.390625 -0.390625 1.171875 -0.390625 -1.171875 -1.953125 1.953125 0.390625 -0.390625 -1.953125 0.390625 -2.734375 -0.390625 1.171875 1.953125 -2.734375 0.390625 1.171875 1.171875 1.171875 1.953125 1.171875 -1.171875 -2.734375 0.390625 -1.953125 -1.171875 1.171875 0.390625 1.171875 -1.171875 2.734375 -1.171875 0.390625 -0.390625 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -0.390625 1.171875 0.390625 1.953125 -1.953125 1.953125 1.953125 -1.171875 -0.390625 -0.390625 -2.734375 0.390625 -1.953125 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="141">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.142 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.283 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.425 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.802 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0
</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 0.212 0.233 0.254 0.275 0.297 0.318 0.339 0.354 0.371 0.435 0.518 0.62 0.738 0.868 1.006 1.15 1.299 1.453 1.611 1.774 1.943 2.117 2.298 2.484 2.678 2.879 3.089 3.306 3.533 3.769 4.015 4.272 4.54 4.819 5.109 5.409 5.717 6.028 6.331 6.607 6.825 6.941 6.95 6.942 6.902 6.831 6.732 6.61 6.468 6.311 6.14 5.96 5.772 5.578 5.382 5.184 4.986 4.79 4.595 4.404 4.217 4.034 3.856 3.684 3.517 3.355 3.2 3.05 2.906 2.767 2.635 2.508 2.386 2.27 2.159 2.053 1.952 1.855 1.763 1.676 1.592 1.513 1.437 1.365 1.297 1.232 1.17 1.111 1.055 1.002 0.951 0.903 0.857 0.814 0.773 0.734 0.697 0.661 0.628 0.596 0.566 0.537 0.51 0.484 0.459 0.436 0.414 0.393 0.373 0.354 0.336 0.319 0.303 0.287 0.273 0.259 0.246 0.233 0.221 0.21

</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="6.95" PeakHeight="386.802" Num="5" zHalfNm="346.663" Error="4.506">
-146.599 -36.188 20.132 -5.4 -0.322
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.425" Depth="0.154"/>
<TopsideChapman PeakHeight="386.802" PeakDensity="599286.6" PeakScaleHeight="29.95" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
