<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 18:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.10.31 (304) 18:00:00</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">
FF202630410311800009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="12.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.738" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.996" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" 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="2.938" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.142" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="330.794" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="231.686" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.148" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="134.760" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="55.726" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.123" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="151.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.630" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="61">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 390.000 387.500 385.000 390.000 392.500 395.000 395.000 395.000 395.000 395.000 395.000 395.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 450.000 455.000 458.032 461.522 465.582 470.364 476.080 483.032 491.671 502.694 517.248 537.351 566.925 614.727
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 66 0 0 72 0 0 0 72 0 0 51 69 69 0 0 66 72 0 63 0 63 69 72 69 66 54 0 66 0 63 63 57 57 60 57 60 57 60 60 60 54 60 57 60 60 60 57 54 51 60 60 57 57 57 57 54 54 51 51 45
</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 -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 -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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.556 90.0 95.0 100.0 105.0 110.0 113.498 115.0 116.996 120.0 120.494 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 330.794 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.975 2.543 2.843 2.938 2.816 2.816 2.816 2.921 2.938 3.112 3.315 3.529 3.754 3.991 4.237 4.492 4.755 5.022 5.292 5.564 5.837 6.108 6.377 6.645 6.91 7.172 7.431 7.687 7.94 8.19 8.438 8.682 8.924 9.163 9.399 9.632 9.861 10.087 10.308 10.524 10.734 10.937 11.131 11.315 11.485 11.64 11.775 11.887 11.972 12.027 12.05 12.05 12.046 12.031 12.006 11.971 11.927 11.874 11.812 11.743 11.666 11.582 11.492 11.395 11.294 11.187 11.075 10.959 10.839 10.716 10.59 10.46 10.328 10.194 10.058 9.92 9.781 9.641 9.5 9.358 9.216 9.073 8.931 8.788 8.646 8.504 8.362 8.222 8.082 7.943 7.804 7.667 7.531 7.397 7.263 7.131 7.0 6.871 6.744 6.617 6.493 6.37 6.249 6.129 6.011 5.895 5.781 5.668 5.557 5.448 5.34 5.234 5.13 5.028 4.927 4.828 4.731 4.636 4.542 4.45 4.359 4.271 4.183 4.098 4.014 3.931 3.85 3.771 3.693 3.617 3.542 3.468 3.396 3.325 3.256 3.188 3.122 3.056 2.992 2.93 2.868 2.808 2.749 2.691 2.635 2.579 2.525 2.472 2.419 2.368 2.318 2.269 2.221 2.174 2.128 2.083 2.039 1.996 1.953 1.912 1.871 1.832 1.793 1.754 1.717 1.681 1.645 1.61 1.576 1.542 1.509 1.477 1.445 1.415 1.385 1.355 1.326 1.298 1.27 1.243 1.216 1.19 1.165 1.14 1.116 1.092

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.938" PeakHeight="110.0" Num="3" Error="0.0">
-30.142 12.625 -2.927
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.938" EndFrequency="12.05" PeakHeight="330.794" Num="5" zHalfNm="231.686" Error="2.06">
-198.247 -20.558 13.001 -5.442 0.946
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.494" Depth="0.122"/>
<TopsideChapman PeakHeight="330.794" PeakDensity="1801519.9" PeakScaleHeight="72.123" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
