<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 19:20:00.000"
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) 19:20:00</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">
FF202630410311920009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.200" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.587" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.564" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="425.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="425.000" 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="11.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.948" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.404" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="361.564" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="262.871" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.442" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="135.296" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.366" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.293" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="154.130" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="63">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
425.000 425.000 425.000 425.000 425.000 425.000 425.000 427.500 430.000 430.833 431.667 432.500 433.333 434.167 435.000 435.000 435.000 435.000 435.000 440.000 440.000 445.000 445.000 445.000 445.000 445.000 445.000 445.000 445.000 450.000 452.500 455.000 455.000 455.000 455.000 460.000 460.000 460.000 465.000 465.000 470.000 470.000 470.000 470.000 475.000 480.000 480.000 485.000 485.000 490.000 492.803 495.948 499.503 503.553 508.209 513.620 519.983 527.575 536.789 548.209 562.734 581.829 608.053
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 66 66 66 0 66 0 0 0 0 0 0 0 63 0 66 63 60 69 72 63 0 0 72 72 69 69 66 63 0 57 63 66 69 69 66 63 60 60 51 51 54 48 57 57 60 60 63 63 63 63 63 60 63 60 0 57 54 54 0 54 0
</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 -1.171875 -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" >
89.661 90.0 95.0 100.0 105.0 110.0 115.0 116.067 120.0 122.133 125.0 128.2 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 361.564 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.229 1.614 2.081 2.326 2.404 2.319 2.278 2.278 2.278 2.338 2.404 2.466 2.638 2.813 2.994 3.185 3.386 3.598 3.822 4.058 4.304 4.557 4.817 5.079 5.343 5.605 5.866 6.123 6.377 6.627 6.873 7.115 7.353 7.588 7.82 8.049 8.275 8.499 8.721 8.941 9.159 9.376 9.591 9.805 10.018 10.229 10.439 10.647 10.853 11.056 11.254 11.446 11.629 11.798 11.948 12.071 12.157 12.198 12.2 12.197 12.183 12.158 12.123 12.077 12.022 11.958 11.885 11.805 11.717 11.623 11.522 11.415 11.303 11.187 11.065 10.94 10.811 10.678 10.543 10.405 10.265 10.123 9.979 9.834 9.688 9.541 9.393 9.245 9.097 8.949 8.801 8.653 8.506 8.36 8.214 8.069 7.926 7.783 7.642 7.501 7.363 7.225 7.09 6.956 6.823 6.692 6.563 6.435 6.31 6.186 6.063 5.943 5.825 5.708 5.593 5.48 5.369 5.26 5.153 5.047 4.943 4.841 4.741 4.643 4.546 4.452 4.359 4.268 4.178 4.09 4.004 3.92 3.837 3.755 3.676 3.598 3.521 3.446 3.372 3.3 3.23 3.161 3.093 3.026 2.961 2.898 2.835 2.774 2.714 2.656 2.598 2.542 2.487 2.433 2.381 2.329 2.278 2.229 2.181 2.133 2.087 2.041 1.997 1.954 1.911 1.869 1.829 1.789 1.75 1.712 1.674 1.638 1.602 1.567 1.533 1.499 1.466 1.434 1.403 1.372 1.342 1.313 1.284 1.256 1.228 1.202 1.175

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.404" PeakHeight="110.0" Num="3" Error="0.0">
-29.605 11.857 -2.591
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.404" EndFrequency="12.2" PeakHeight="361.564" Num="5" zHalfNm="262.871" Error="3.535">
-212.784 -35.696 23.678 -11.422 2.86
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="18.2" Depth="0.126"/>
<TopsideChapman PeakHeight="361.564" PeakDensity="1846650.1" PeakScaleHeight="70.293" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
