<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 16:10:00.000"
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="15.0">
<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" >
2026.10.18 (291) 16:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629110181610009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.912" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.678" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.400" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="7.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.531" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.317" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.327" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="267.798" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="170.327" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.409" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="105.082" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.055" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.571" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="174.460" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.030" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 374.000 378.000 382.000 386.000 390.000 390.000 390.000 390.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 420.000 420.000 420.000 425.000 425.000 429.696 435.531 442.976
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 63 0 0 54 60 51 54 51 60 54 63 57 63 63 51 63 66 66 66 69 66 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
</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" >
89.494 90.0 95.0 100.0 105.0 110.0 111.851 113.702 115.0 115.553 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 267.798 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.231 2.871 3.209 3.317 3.194 3.194 3.28 3.317 3.449 3.61 3.779 3.953 4.126 4.293 4.453 4.605 4.748 4.883 5.012 5.135 5.254 5.368 5.478 5.586 5.691 5.794 5.896 5.997 6.097 6.197 6.297 6.398 6.501 6.605 6.714 6.827 6.947 7.066 7.1 7.099 7.091 7.075 7.051 7.019 6.981 6.936 6.886 6.83 6.769 6.703 6.633 6.559 6.481 6.401 6.317 6.231 6.143 6.053 5.961 5.868 5.774 5.679 5.583 5.486 5.39 5.293 5.196 5.099 5.003 4.907 4.811 4.717 4.622 4.529 4.437 4.345 4.255 4.166 4.077 3.99 3.905 3.82 3.737 3.655 3.574 3.495 3.417 3.34 3.265 3.191 3.118 3.047 2.977 2.909 2.841 2.776 2.711 2.648 2.586 2.525 2.466 2.408 2.351 2.295 2.241 2.188 2.136 2.085 2.035 1.986 1.939 1.892 1.847 1.802 1.759 1.716 1.675 1.635 1.595 1.556 1.519 1.482 1.446 1.411 1.376 1.343 1.31 1.278 1.247 1.217 1.187 1.158 1.13 1.102 1.075 1.049 1.023 0.998 0.974 0.95 0.927 0.904 0.882 0.86 0.839 0.818 0.798 0.779 0.76 0.741 0.723 0.705 0.688 0.671 0.654 0.638 0.623 0.607 0.592 0.578 0.563 0.55 0.536 0.523 0.51 0.497 0.485 0.473 0.462 0.45 0.439 0.428 0.418 0.408 0.397 0.388 0.378 0.369 0.36 0.351 0.342 0.334 0.326 0.318 0.31 0.302

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.317" PeakHeight="110.0" Num="3" Error="0.0">
-30.448 13.073 -3.131
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.317" EndFrequency="7.1" PeakHeight="267.798" Num="5" zHalfNm="170.327" Error="1.939">
-120.545 -51.187 27.468 -9.001 1.02
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.553" Depth="0.123"/>
<TopsideChapman PeakHeight="267.798" PeakDensity="625434.25" PeakScaleHeight="62.571" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
