<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 19:30:00.000"
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 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) 19:30:00</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">
FF202630410311930009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.583" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.770" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="420.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="420.000" 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="11.800" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" 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="2.309" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="367.426" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.558" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.461" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.339" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.410" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.916" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="153.650" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="70">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.25 12.3
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
420.000 420.000 422.500 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 430.000 430.000 432.500 435.000 437.500 440.000 437.500 435.000 435.000 435.000 435.000 436.875 438.750 440.625 442.500 444.375 446.250 448.125 450.000 450.000 450.000 450.000 452.500 455.000 456.667 458.333 460.000 460.000 460.000 460.000 465.000 465.000 465.000 470.000 470.000 470.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 515.000 525.000 530.000 540.000 551.020 564.863 582.776 606.859
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 0 0 0 0 0 60 60 0 0 0 0 0 63 0 0 0 63 0 66 69 72 57 0 0 0 0 0 0 0 60 66 63 60 0 0 0 0 60 63 66 66 63 63 63 60 60 63 57 60 60 57 60 60 63 60 57 60 57 57 57 0 60 60 54 57 0 54 42 48
</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 2.734375 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 2.734375 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" >
89.682 90.0 95.0 100.0 105.0 110.0 115.0 116.555 120.0 123.11 125.0 129.665 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 367.426 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.549 1.999 2.234 2.309 2.236 2.182 2.182 2.182 2.219 2.309 2.32 2.481 2.649 2.825 3.011 3.208 3.418 3.639 3.871 4.113 4.361 4.615 4.872 5.129 5.385 5.639 5.89 6.138 6.382 6.623 6.861 7.096 7.328 7.557 7.784 8.009 8.232 8.453 8.673 8.892 9.109 9.326 9.543 9.758 9.974 10.188 10.402 10.616 10.828 11.038 11.245 11.448 11.643 11.827 11.994 12.134 12.238 12.293 12.3 12.298 12.286 12.262 12.226 12.18 12.124 12.059 11.984 11.902 11.812 11.714 11.61 11.5 11.385 11.264 11.139 11.009 10.876 10.739 10.599 10.457 10.312 10.166 10.017 9.868 9.717 9.566 9.414 9.262 9.109 8.957 8.805 8.653 8.502 8.352 8.203 8.055 7.907 7.762 7.617 7.474 7.332 7.192 7.053 6.917 6.781 6.648 6.517 6.387 6.259 6.133 6.009 5.887 5.767 5.649 5.532 5.418 5.306 5.195 5.087 4.98 4.875 4.772 4.672 4.573 4.475 4.38 4.286 4.195 4.105 4.017 3.93 3.845 3.762 3.681 3.601 3.523 3.446 3.371 3.298 3.226 3.155 3.086 3.019 2.952 2.888 2.824 2.762 2.701 2.642 2.584 2.527 2.471 2.416 2.363 2.31 2.259 2.209 2.16 2.112 2.066 2.02 1.975 1.931 1.888 1.846 1.805 1.765 1.726 1.687 1.65 1.613 1.577 1.542 1.508 1.474 1.441 1.409 1.377 1.347 1.317 1.287 1.259 1.23 1.203 1.176 1.15

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.309" PeakHeight="110.0" Num="3" Error="0.0">
-29.491 11.698 -2.525
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.309" EndFrequency="12.3" PeakHeight="367.426" Num="5" zHalfNm="270.558" Error="3.366">
-214.519 -40.237 26.407 -12.027 2.615
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.665" Depth="0.127"/>
<TopsideChapman PeakHeight="367.426" PeakDensity="1877047.1" PeakScaleHeight="68.916" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
