<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-29 -302 04:10:00.000"
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 22 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, 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" >
2026.10.29 (302) 04:10:00</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">
FF202630210290410009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.085" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.577" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.550" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="255.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="255.000" 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="4.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="335.000" 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="1.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="1.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="319.161" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="266.193" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.075" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.271" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.224" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.081" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="64.710" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.600" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="68">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 4.85 4.9 4.95 5.0 5.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
255.000 255.000 255.000 255.000 255.000 255.000 255.000 258.333 261.667 265.000 266.071 267.143 268.214 269.286 270.357 271.429 272.500 273.571 274.643 275.714 276.786 277.857 278.929 280.000 281.071 282.143 283.214 284.286 285.357 286.429 287.500 288.571 289.643 290.714 291.786 292.857 293.929 295.000 296.071 297.143 298.214 299.286 300.357 301.429 302.500 303.571 304.643 305.714 306.786 307.857 308.929 310.000 310.000 310.000 320.000 327.500 335.000 335.000 342.500 350.000 358.722 368.202 378.543 389.867 402.322 416.087 431.378 448.467
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 57 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 66 0 0 63 0 63 66 0 57 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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 1.953125 -0.390625 0.390625 0.390625 -0.390625 1.953125 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 -1.953125 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 -1.953125 -1.171875 0.390625 -0.390625 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="146">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.833 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.667 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.5 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 319.161 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.309 0.281 0.241 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.233 0.256 0.279 0.302 0.324 0.347 0.354 0.402 0.492 0.622 0.808 1.071 1.423 1.85 2.306 2.745 3.143 3.494 3.799 4.062 4.288 4.479 4.64 4.771 4.876 4.956 5.011 5.042 5.05 5.05 5.04 5.016 4.979 4.931 4.873 4.806 4.73 4.648 4.56 4.467 4.37 4.269 4.166 4.061 3.954 3.847 3.74 3.632 3.525 3.419 3.314 3.21 3.108 3.008 2.91 2.813 2.719 2.627 2.537 2.449 2.364 2.281 2.201 2.122 2.047 1.973 1.902 1.833 1.766 1.702 1.639 1.579 1.521 1.465 1.41 1.358 1.307 1.259 1.211 1.166 1.122 1.08 1.04 1.0 0.963 0.926 0.891 0.858 0.825 0.794 0.764 0.735 0.707 0.68 0.654 0.629 0.605 0.582 0.56 0.539 0.518 0.499 0.48 0.461 0.444 0.427 0.411 0.395 0.38 0.365 0.351 0.338 0.325 0.313 0.301 0.289 0.278 0.268 0.257 0.248 0.238 0.229 0.22 0.212 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="5.05" PeakHeight="319.161" Num="5" zHalfNm="266.193" Error="2.931">
-125.611 29.107 -12.568 1.891 -0.48
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.5" Depth="0.154"/>
<TopsideChapman PeakHeight="319.161" PeakDensity="316408.2" PeakScaleHeight="40.081" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
