<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 22:10:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, 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) 22:10:00</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">
FF202630410312210009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.999" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.342" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="10.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="10.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.800" Name="fxI" 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="11.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="395.645" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="10.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="10.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="347.890" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="303.095" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.396" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="65.416" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="23.179" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="33.718" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="64.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.120" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
365.000 370.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 380.000 381.016 382.143 383.401 384.813 386.411 388.234 390.331 392.771 395.645 399.080 403.258 408.448 415.072 423.816 435.892 453.657 482.363
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 69 0 66 78 75 75 78 69 69 69 72 60 66 63 66 60 60 0 60 54 66 60 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 0.390625 -0.390625 -2.734375 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="154">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.428 145.0 150.0 155.0 160.0 165.0 170.0 174.856 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.284 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.89 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.228 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.201 0.224 0.248 0.272 0.296 0.319 0.343 0.354 0.405 0.514 0.647 0.808 1.0 1.226 1.49 1.795 2.143 2.536 2.973 3.456 3.981 4.544 5.141 5.765 6.406 7.056 7.703 8.335 8.939 9.503 10.015 10.463 10.837 11.128 11.328 11.434 11.45 11.446 11.402 11.317 11.193 11.036 10.851 10.64 10.41 10.162 9.9 9.628 9.349 9.063 8.775 8.485 8.196 7.908 7.623 7.342 7.066 6.796 6.531 6.274 6.023 5.779 5.543 5.314 5.093 4.879 4.673 4.475 4.283 4.099 3.922 3.752 3.589 3.432 3.281 3.137 2.999 2.866 2.739 2.618 2.501 2.39 2.283 2.182 2.084 1.991 1.901 1.816 1.735 1.657 1.582 1.511 1.443 1.378 1.316 1.257 1.2 1.146 1.094 1.045 0.998 0.953 0.91 0.868 0.829 0.792 0.756 0.722 0.689 0.658 0.628 0.6 0.573 0.547 0.522 0.498 0.476 0.454 0.434 0.414 0.395 0.377 0.36 0.344 0.328 0.314 0.299 0.286 0.273 0.261 0.249 0.237 0.227 0.216 0.207

</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="11.45" PeakHeight="347.89" Num="5" zHalfNm="303.095" Error="0.225">
-141.2 0.792 -0.244 0.057 -0.011
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.284" Depth="0.154"/>
<TopsideChapman PeakHeight="347.89" PeakDensity="1626581.9" PeakScaleHeight="33.718" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
