<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 15:30:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: 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) 15:30:00</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">
FF202630410311530009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.694" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.157" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" 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="9.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.360" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.346" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="320.889" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="211.744" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.079" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="142.295" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="45.069" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="77.709" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="168.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.530" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="36">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 10.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 395.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 450.000 455.000 455.000 459.878 465.263 471.238 477.905 485.394 493.865 503.524 514.642 527.576 542.809 561.016 583.159
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 54 0 51 60 63 0 57 48 54 0 51 0 54 60 57 63 60 60 60 60 51 51 57 57 57 57 57 57 54 0 51 45 0 45 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 1.171875 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" >
89.488 90.0 95.0 100.0 105.0 110.0 111.676 113.351 115.0 115.027 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 320.889 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.26 2.908 3.251 3.36 3.237 3.237 3.358 3.36 3.544 3.731 3.922 4.118 4.322 4.532 4.748 4.969 5.193 5.419 5.644 5.868 6.088 6.305 6.517 6.725 6.929 7.128 7.322 7.513 7.7 7.883 8.062 8.239 8.412 8.582 8.75 8.915 9.077 9.236 9.391 9.543 9.691 9.832 9.967 10.092 10.205 10.302 10.378 10.428 10.449 10.45 10.447 10.436 10.418 10.391 10.358 10.318 10.272 10.219 10.161 10.097 10.029 9.955 9.877 9.795 9.709 9.62 9.527 9.432 9.333 9.232 9.129 9.024 8.917 8.809 8.699 8.588 8.476 8.363 8.25 8.136 8.021 7.907 7.792 7.677 7.562 7.448 7.334 7.22 7.107 6.994 6.882 6.771 6.661 6.551 6.442 6.335 6.228 6.122 6.018 5.914 5.812 5.711 5.611 5.512 5.415 5.319 5.224 5.13 5.037 4.946 4.857 4.768 4.681 4.595 4.51 4.427 4.345 4.264 4.184 4.106 4.029 3.954 3.879 3.806 3.734 3.663 3.594 3.525 3.458 3.392 3.327 3.263 3.201 3.139 3.079 3.02 2.961 2.904 2.848 2.793 2.739 2.686 2.633 2.582 2.532 2.483 2.434 2.387 2.34 2.294 2.249 2.205 2.162 2.12 2.078 2.038 1.998 1.958 1.92 1.882 1.845 1.809 1.773 1.738 1.704 1.67 1.637 1.605 1.573 1.542 1.512 1.482 1.453 1.424 1.396 1.368 1.341 1.315 1.289 1.263 1.238 1.214 1.19 1.166 1.143 1.12

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.36" PeakHeight="110.0" Num="3" Error="0.0">
-30.479 13.119 -3.152
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.36" EndFrequency="10.45" PeakHeight="320.889" Num="5" zHalfNm="211.744" Error="2.52">
-189.632 -27.143 16.545 -7.336 1.704
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.027" Depth="0.123"/>
<TopsideChapman PeakHeight="320.889" PeakDensity="1354869.8" PeakScaleHeight="77.709" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
