<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 20:00:00.000"
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) 20:00:00</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">
FF202630410312000009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="12.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.552" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.778" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="410.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="410.000" 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="11.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.955" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.073" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.711" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.468" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.400" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="56.752" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.819" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="148.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.500" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="74">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.25 12.3 12.35 12.4 12.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
410.000 412.500 415.000 415.000 417.500 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 435.000 438.333 441.667 445.000 445.000 445.000 445.000 445.000 445.000 450.000 450.000 450.000 450.000 455.000 457.000 459.000 461.000 463.000 465.000 465.000 465.000 465.000 467.500 470.000 470.000 470.000 475.000 475.000 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 500.000 505.000 505.000 507.500 510.000 515.000 520.000 530.000 535.000 545.000 550.000 561.113 575.112 593.292 617.852
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 60 0 0 0 72 75 78 78 75 78 78 75 72 0 0 69 72 0 0 66 63 48 0 63 69 69 0 0 0 0 54 57 57 54 0 60 0 57 60 0 57 54 57 60 60 60 54 54 51 54 54 54 57 0 48 57 57 60 57 51 51 0 51 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 -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" >
89.773 90.0 95.0 100.0 105.0 110.0 115.0 118.464 120.0 125.0 126.929 130.0 135.0 135.393 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.073 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.22 1.31 1.693 1.892 1.955 1.909 1.822 1.822 1.822 1.822 1.87 1.949 1.955 2.095 2.251 2.412 2.582 2.761 2.952 3.156 3.371 3.598 3.835 4.081 4.334 4.592 4.852 5.113 5.374 5.633 5.891 6.146 6.399 6.65 6.898 7.144 7.388 7.63 7.87 8.109 8.346 8.582 8.817 9.051 9.284 9.517 9.749 9.98 10.21 10.439 10.667 10.893 11.115 11.334 11.546 11.749 11.939 12.11 12.255 12.366 12.433 12.45 12.45 12.441 12.42 12.386 12.342 12.287 12.222 12.147 12.064 11.973 11.874 11.768 11.656 11.537 11.414 11.285 11.152 11.015 10.875 10.731 10.585 10.436 10.285 10.133 9.979 9.824 9.668 9.512 9.355 9.198 9.042 8.885 8.73 8.574 8.42 8.267 8.115 7.964 7.814 7.666 7.519 7.373 7.23 7.088 6.948 6.81 6.673 6.539 6.406 6.276 6.147 6.02 5.896 5.773 5.653 5.534 5.418 5.303 5.191 5.081 4.972 4.866 4.761 4.659 4.558 4.46 4.363 4.268 4.175 4.084 3.995 3.907 3.822 3.738 3.655 3.575 3.496 3.418 3.343 3.269 3.196 3.125 3.055 2.987 2.921 2.855 2.792 2.729 2.668 2.608 2.55 2.493 2.437 2.382 2.329 2.276 2.225 2.175 2.126 2.078 2.031 1.985 1.94 1.897 1.854 1.812 1.771 1.731 1.692 1.654 1.616 1.58 1.544 1.509 1.475 1.441 1.409 1.377 1.345 1.315 1.285 1.256 1.227 1.2 1.172

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.955" PeakHeight="110.0" Num="3" Error="0.0">
-28.998 11.022 -2.251
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.955" EndFrequency="12.45" PeakHeight="379.073" Num="5" zHalfNm="284.711" Error="3.083">
-222.679 -36.404 24.122 -11.56 2.841
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="25.393" Depth="0.133"/>
<TopsideChapman PeakHeight="379.073" PeakDensity="1923108.0" PeakScaleHeight="67.819" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
