<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 21:10:00.000"
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: 50% PACIFIC flags: Moderate F-spread, F2x cusp not found, 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) 21:10:00</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">
FF202630410312110009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="11.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.681" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.828" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="11.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="11.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="500.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="500.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.639" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="11.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="11.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="372.272" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="310.393" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.073" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="90.175" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.347" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="46.356" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="90.610" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.950" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
500.000 500.000 500.000 500.000 500.000 500.000 500.000 500.000 503.624
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 0 0 45 45 45 45 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
1.171875 -1.953125 0.390625 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.957 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.946 140.0 145.0 150.0 155.0 160.0 161.893 165.0 170.0 175.0 180.0 185.0 187.839 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.272 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.424 0.554 0.619 0.639 0.63 0.602 0.552 0.473 0.344 0.309 0.309 0.309 0.309 0.309 0.309 0.309 0.349 0.412 0.476 0.539 0.603 0.639 0.693 0.818 0.951 1.094 1.252 1.425 1.617 1.829 2.062 2.317 2.594 2.893 3.213 3.554 3.913 4.289 4.681 5.085 5.501 5.925 6.356 6.792 7.229 7.665 8.098 8.524 8.938 9.339 9.72 10.078 10.407 10.701 10.957 11.168 11.33 11.44 11.494 11.5 11.496 11.47 11.42 11.349 11.258 11.149 11.024 10.885 10.732 10.568 10.395 10.212 10.023 9.827 9.626 9.422 9.214 9.005 8.794 8.582 8.37 8.159 7.949 7.74 7.534 7.33 7.128 6.93 6.734 6.542 6.353 6.168 5.987 5.81 5.636 5.467 5.301 5.14 4.982 4.829 4.68 4.534 4.392 4.255 4.121 3.991 3.864 3.741 3.622 3.507 3.394 3.285 3.18 3.077 2.978 2.881 2.788 2.698 2.61 2.525 2.443 2.363 2.286 2.211 2.139 2.069 2.001 1.935 1.872 1.811 1.751 1.693 1.638 1.584 1.532 1.481 1.432 1.385 1.34 1.295 1.253 1.211 1.171 1.133 1.095 1.059 1.024 0.99 0.957 0.926 0.895 0.866 0.837 0.809 0.782 0.757 0.732 0.707 0.684 0.661 0.639 0.618 0.598 0.578 0.559 0.54 0.522 0.505 0.488 0.472 0.457 0.441 0.427 0.413 0.399 0.386 0.373 0.361 0.349 0.337 0.326 0.315 0.305 0.295 0.285 0.275

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.639" PeakHeight="110.0" Num="3" Error="0.0">
-24.089 5.698 -0.652
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.639" EndFrequency="11.5" PeakHeight="372.272" Num="5" zHalfNm="310.393" Error="1.972">
-181.77 -5.447 3.335 -1.429 0.878
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.839" Depth="0.33"/>
<TopsideChapman PeakHeight="372.272" PeakDensity="1640818.9" PeakScaleHeight="46.356" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
