<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-23 -296 18:00:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.23 (296) 18:00:00</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">
FF202629610231800009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.575" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.875" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="88" Val="4.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="301.713" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.948" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.147" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="196.826" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="135.944" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.146" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="67.993" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.568" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="40.644" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="103.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.310" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="11">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 270.000 275.000 278.333 281.667 285.000 288.889 293.992 301.713 314.764 341.567
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 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 -2.734375 -0.390625 -1.953125 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="124">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.555 90.0 95.0 100.0 105.0 110.0 113.451 115.0 116.903 120.0 120.354 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 196.826 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.982 2.552 2.852 2.948 2.826 2.826 2.826 2.935 2.948 3.125 3.316 3.502 3.677 3.839 3.99 4.13 4.262 4.386 4.506 4.621 4.731 4.837 4.932 4.994 5.0 4.997 4.981 4.952 4.912 4.861 4.8 4.731 4.655 4.573 4.485 4.392 4.296 4.197 4.096 3.993 3.889 3.784 3.679 3.574 3.47 3.366 3.264 3.163 3.064 2.966 2.87 2.776 2.684 2.594 2.507 2.421 2.338 2.257 2.179 2.102 2.028 1.957 1.887 1.819 1.754 1.691 1.63 1.571 1.514 1.458 1.405 1.354 1.304 1.256 1.21 1.165 1.122 1.08 1.04 1.002 0.964 0.928 0.894 0.861 0.828 0.797 0.768 0.739 0.711 0.685 0.659 0.634 0.611 0.588 0.566 0.544 0.524 0.504 0.485 0.467 0.449 0.433 0.416 0.401 0.386 0.371 0.357 0.344 0.331 0.318 0.306 0.295 0.284 0.273 0.263 0.253 0.243 0.234 0.225 0.217 0.209 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.948" PeakHeight="110.0" Num="3" Error="0.0">
-30.151 12.638 -2.932
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.948" EndFrequency="5.0" PeakHeight="196.826" Num="5" zHalfNm="135.944" Error="0.926">
-65.784 -16.453 7.849 -2.419 0.335
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.354" Depth="0.122"/>
<TopsideChapman PeakHeight="196.826" PeakDensity="310173.7" PeakScaleHeight="40.644" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
