<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 11:30:00.000"
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="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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: 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" >
2026.10.17 (290) 11:30:00</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">
FF202629010171130009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.463" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.378" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="321.999" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.984" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.166" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="216.316" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="155.737" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.972" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.243" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.981" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.035" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="101.730" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.180" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="13">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 315.000 315.000 315.000 315.853 316.891 318.181 319.826 321.999 325.000 329.416
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 84 78 81 78 75 72 72 75 75 75 72 54
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="134">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.548 90.0 95.0 100.0 105.0 110.0 113.288 115.0 116.575 119.863 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 216.316 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.006 2.583 2.887 2.984 2.862 2.862 2.862 2.984 2.991 3.235 3.471 3.721 3.984 4.251 4.505 4.74 4.954 5.151 5.333 5.504 5.667 5.824 5.978 6.129 6.281 6.436 6.596 6.738 6.75 6.745 6.72 6.679 6.621 6.548 6.463 6.367 6.26 6.146 6.024 5.896 5.763 5.626 5.487 5.345 5.202 5.058 4.914 4.771 4.628 4.487 4.347 4.21 4.074 3.942 3.811 3.684 3.56 3.438 3.32 3.204 3.092 2.983 2.878 2.775 2.675 2.579 2.485 2.395 2.308 2.223 2.141 2.062 1.986 1.912 1.841 1.773 1.706 1.643 1.581 1.522 1.465 1.409 1.356 1.305 1.256 1.208 1.163 1.119 1.076 1.035 0.996 0.958 0.922 0.887 0.853 0.821 0.789 0.759 0.73 0.702 0.676 0.65 0.625 0.601 0.578 0.556 0.535 0.515 0.495 0.476 0.458 0.44 0.423 0.407 0.392 0.377 0.362 0.348 0.335 0.322 0.31 0.298 0.287 0.276 0.265 0.255 0.245 0.236 0.227 0.218 0.21 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.984" PeakHeight="110.0" Num="3" Error="0.0">
-30.182 12.683 -2.953
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.984" EndFrequency="6.75" PeakHeight="216.316" Num="5" zHalfNm="155.737" Error="3.284">
-79.991 -27.153 16.126 -7.266 1.831
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.863" Depth="0.122"/>
<TopsideChapman PeakHeight="216.316" PeakDensity="565291.56" PeakScaleHeight="40.035" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
