<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 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="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 22 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, F2o cusp not found, One of F2 cusps was derived from the other</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" >
2026.10.25 (298) 23:50:00</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">
FF202629810252350009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.836" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.551" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="0.450" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="446.822" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="370.794" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="326.370" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.632" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="65.892" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.234" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="32.941" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="69.550" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 355.000 355.000 353.125 351.250 349.375 347.500 345.625 343.750 341.875 340.000 339.000 338.000 337.000 336.000 335.000 334.000 333.000 332.000 331.000 330.000 329.000 328.000 327.000 326.000 325.000 320.000 320.000 320.000 321.842 323.684 325.526 327.368 329.211 331.053 332.895 334.737 336.579 338.421 340.263 342.105 343.947 345.789 347.632 349.474 351.316 353.158 355.000 370.000 375.000 385.000 395.000 395.000 396.500 398.000 399.500 401.000 402.500 404.000 405.500 407.000 408.500 410.000 430.000 430.000 425.000 435.000 435.833 436.667 437.500 437.641 437.797 437.970 438.164 438.383 438.631 438.915 439.244 439.628 440.084 440.633 441.307 442.154 443.251 444.728 446.822 450.024 455.527 467.209
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 57 0 66 60 0 0 0 60 57 0 0 0 0 0 0 0 0 66 0 69 0 0 0 0 0 69 69 0 0 0 0 0 0 0 0 0 0 0 0 57 0 0 57 0 60 54 63 0 57 0 66 63 0 0 0 0 0 0 0 57 60 60 60 60 0 54 0 0 0 0 54 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 1.953125 0.390625 0.390625 1.171875 -0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 -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 -0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -2.734375 -1.171875 0.390625 1.171875 -0.390625 -1.171875 0.390625 0.390625 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 -0.390625 0.390625 1.171875 -0.390625 2.734375 1.171875 -1.171875 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 -0.390625 0.390625 1.953125 0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 1.953125 0.390625 0.390625 1.171875 1.953125 1.953125 1.953125 2.734375 2.734375 1.171875 0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="148">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.938 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.876 185.0 190.0 195.0 200.0 205.0 210.0 215.0 217.814 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.794 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0
</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 0.332 0.315 0.29 0.257 0.211 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.235 0.256 0.278 0.299 0.321 0.342 0.354 0.408 0.514 0.62 0.737 0.866 1.013 1.178 1.362 1.565 1.785 2.022 2.273 2.537 2.811 3.095 3.387 3.688 3.995 4.309 4.629 4.954 5.283 5.615 5.947 6.274 6.593 6.893 7.162 7.383 7.535 7.599 7.6 7.588 7.545 7.475 7.379 7.262 7.126 6.975 6.811 6.637 6.455 6.266 6.073 5.878 5.681 5.484 5.288 5.094 4.903 4.715 4.531 4.351 4.175 4.005 3.839 3.678 3.523 3.373 3.228 3.089 2.954 2.825 2.7 2.581 2.466 2.356 2.251 2.15 2.053 1.961 1.872 1.787 1.706 1.628 1.554 1.483 1.415 1.35 1.289 1.229 1.173 1.119 1.068 1.019 0.972 0.927 0.884 0.843 0.805 0.767 0.732 0.698 0.666 0.635 0.606 0.578 0.551 0.526 0.501 0.478 0.456 0.435 0.415 0.396 0.377 0.36 0.343 0.327 0.312 0.298 0.284 0.271 0.258 0.246 0.235 0.224 0.214 0.204

</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="7.6" PeakHeight="370.794" Num="5" zHalfNm="326.37" Error="5.71">
-144.378 -17.775 11.733 -4.469 1.909
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="107.814" Depth="0.154"/>
<TopsideChapman PeakHeight="370.794" PeakDensity="716625.3" PeakScaleHeight="32.941" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
