<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 11:40:00.000"
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="12.0">
<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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2x cusp, 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" >
2026.10.21 (294) 11:40:00</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">
FF202629410211140009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.148" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.483" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="9.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="9.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="380.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.030" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="9.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="9.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.188" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="242.397" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="176.431" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.970" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="89.650" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="25.869" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.964" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="96.490" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.920" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="6">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
9.75 9.8 9.85 9.9 9.95 10.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 380.000 380.000 383.624 419.495
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 57 51 51 57 42
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="174">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.541 90.0 95.0 100.0 105.0 110.0 113.085 115.0 116.169 119.254 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 242.397 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.037 2.623 2.931 3.03 2.908 2.908 2.908 3.03 3.076 3.383 3.696 4.022 4.363 4.719 5.088 5.466 5.847 6.227 6.601 6.968 7.324 7.667 7.997 8.31 8.606 8.883 9.137 9.365 9.565 9.732 9.861 9.95 9.995 10.0 9.997 9.977 9.939 9.883 9.812 9.727 9.628 9.518 9.397 9.267 9.128 8.982 8.83 8.673 8.51 8.345 8.176 8.005 7.832 7.658 7.484 7.31 7.136 6.963 6.791 6.62 6.451 6.284 6.119 5.957 5.797 5.64 5.485 5.334 5.185 5.039 4.897 4.757 4.621 4.488 4.357 4.23 4.106 3.986 3.868 3.753 3.641 3.533 3.427 3.324 3.224 3.126 3.032 2.94 2.85 2.763 2.679 2.597 2.517 2.44 2.365 2.292 2.222 2.153 2.087 2.022 1.959 1.899 1.84 1.783 1.727 1.674 1.622 1.571 1.522 1.475 1.429 1.384 1.341 1.299 1.259 1.219 1.181 1.144 1.109 1.074 1.04 1.008 0.976 0.946 0.916 0.887 0.86 0.833 0.807 0.781 0.757 0.733 0.71 0.688 0.666 0.645 0.625 0.606 0.587 0.568 0.55 0.533 0.516 0.5 0.484 0.469 0.455 0.44 0.426 0.413 0.4 0.388 0.375 0.364 0.352 0.341 0.33 0.32 0.31 0.3 0.291 0.282 0.273 0.264 0.256 0.248 0.24 0.233 0.225 0.218 0.211 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.03" PeakHeight="110.0" Num="3" Error="0.0">
-30.22 12.739 -2.978
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.03" EndFrequency="10.0" PeakHeight="242.397" Num="5" zHalfNm="176.431" Error="1.359">
-121.189 -3.339 2.151 -1.231 0.465
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.254" Depth="0.122"/>
<TopsideChapman PeakHeight="242.397" PeakDensity="1240694.8" PeakScaleHeight="48.964" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
