<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Moderate F-spread, 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" >
2026.10.31 (304) 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">
FF202630410312350009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.325" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.579" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="336.298" 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="8.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="300.615" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="274.048" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.632" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="38.773" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.360" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="20.004" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="38.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="42">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 296.667 298.333 300.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 312.500 315.000 316.250 317.500 318.750 320.000 320.000 320.000 320.000 320.877 321.849 322.932 324.147 325.518 327.079 328.871 330.950 333.391 336.298 339.817 344.166 349.675 356.884 366.719 380.937
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 63 0 57 0 0 72 0 0 0 0 75 60 0 72 0 0 0 0 0 0 0 75 0 0 69 75 75 66 69 60 0 66 66 0 48 0 54 45 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 -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 1.171875 -0.390625 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="104">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.893 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.785 185.0 190.0 195.0 200.0 205.0 210.0 215.0 217.678 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.615 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0
</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 0.314 0.29 0.256 0.21 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.235 0.257 0.278 0.3 0.321 0.343 0.354 0.426 0.626 0.895 1.25 1.702 2.264 2.939 3.727 4.612 5.568 6.559 7.536 8.445 9.231 9.843 10.241 10.398 10.4 10.353 10.199 9.955 9.642 9.276 8.874 8.448 8.008 7.565 7.124 6.691 6.271 5.866 5.478 5.108 4.758 4.427 4.116 3.823 3.55 3.293 3.054 2.832 2.624 2.431 2.252 2.085 1.931 1.787 1.654 1.531 1.417 1.311 1.213 1.122 1.038 0.961 0.889 0.822 0.76 0.703 0.651 0.602 0.557 0.515 0.476 0.44 0.407 0.377 0.348 0.322 0.298 0.276 0.255 0.236 0.218 0.202

</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="10.4" PeakHeight="300.615" Num="5" zHalfNm="274.048" Error="0.265">
-82.935 0.068 -0.135 0.09 -0.025
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="107.678" Depth="0.154"/>
<TopsideChapman PeakHeight="300.615" PeakDensity="1341935.5" PeakScaleHeight="20.004" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
