<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 18:20:00.000"
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) 18:20:00</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">
FF202630410311820009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.739" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.412" 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="12.500" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.833" 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="/" />
<URSI ID="92" Val="334.325" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="239.755" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.238" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="128.258" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.543" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.273" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="149.240" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.480" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="71">
<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 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 12.1 12.15 12.2
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 387.500 390.000 390.000 390.000 391.250 392.500 393.750 395.000 395.000 395.000 395.000 395.000 395.000 395.000 397.500 400.000 400.000 405.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 417.500 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 445.000 455.000 460.000 460.000 465.000 470.000 475.000 482.605 491.670 502.664 516.272 533.555 556.232 587.296
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 69 69 69 0 0 66 63 60 0 0 72 0 72 0 69 72 72 0 0 0 66 69 69 0 69 0 66 0 60 66 63 0 63 63 57 54 63 63 60 60 63 0 60 60 60 63 60 63 60 63 60 60 63 63 60 54 60 60 60 57 60 57 54 54 0 0 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 -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" >
89.575 90.0 95.0 100.0 105.0 110.0 113.98 115.0 117.961 120.0 121.941 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 334.325 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.235 1.904 2.452 2.741 2.833 2.711 2.711 2.711 2.774 2.833 2.943 3.137 3.347 3.572 3.81 4.06 4.318 4.582 4.848 5.115 5.382 5.647 5.909 6.169 6.426 6.681 6.933 7.182 7.43 7.675 7.918 8.16 8.4 8.638 8.876 9.112 9.347 9.581 9.813 10.044 10.273 10.499 10.722 10.941 11.154 11.358 11.552 11.731 11.89 12.023 12.122 12.183 12.2 12.2 12.192 12.172 12.14 12.098 12.045 11.982 11.911 11.831 11.743 11.647 11.545 11.436 11.322 11.202 11.078 10.949 10.816 10.68 10.541 10.399 10.254 10.108 9.96 9.81 9.66 9.508 9.356 9.204 9.051 8.899 8.746 8.595 8.443 8.293 8.143 7.995 7.848 7.701 7.557 7.413 7.271 7.131 6.992 6.855 6.72 6.587 6.455 6.326 6.198 6.072 5.948 5.826 5.706 5.588 5.471 5.357 5.245 5.135 5.026 4.92 4.815 4.713 4.612 4.514 4.417 4.322 4.228 4.137 4.047 3.96 3.874 3.789 3.706 3.625 3.546 3.468 3.392 3.318 3.245 3.173 3.103 3.034 2.967 2.902 2.837 2.774 2.713 2.653 2.594 2.536 2.479 2.424 2.37 2.317 2.265 2.215 2.165 2.117 2.069 2.023 1.978 1.933 1.89 1.848 1.806 1.766 1.726 1.687 1.649 1.612 1.576 1.541 1.506 1.472 1.439 1.407 1.375 1.344 1.314 1.284 1.255 1.227 1.199 1.172 1.146 1.12 1.095 1.07 1.046 1.022 0.999 0.976 0.954

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.833" PeakHeight="110.0" Num="3" Error="0.0">
-30.05 12.49 -2.865
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.833" EndFrequency="12.2" PeakHeight="334.325" Num="5" zHalfNm="239.755" Error="2.39">
-194.698 -29.808 18.007 -6.598 0.713
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="11.941" Depth="0.122"/>
<TopsideChapman PeakHeight="334.325" PeakDensity="1846650.1" PeakScaleHeight="68.273" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
