<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-25 -298 12:30:00.000"
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="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, F2O model cusp does not fit trace</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" >
2026.10.25 (298) 12:30:00</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">
FF202629810251230009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.614" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.043" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="6.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="305.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.208" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.275" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="206.898" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="143.967" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.014" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="56.270" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.766" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.465" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="111.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="21">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 315.000 315.000 315.000 311.250 307.500 303.750 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 0 0 0 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 2.734375 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 2.734375 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="123">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.511 90.0 95.0 100.0 105.0 110.0 112.311 114.621 115.0 116.932 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 206.898 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.157 2.776 3.104 3.208 3.086 3.086 3.106 3.208 3.326 3.572 3.817 4.02 4.192 4.344 4.483 4.613 4.739 4.861 4.982 5.102 5.225 5.351 5.483 5.626 5.787 5.994 6.1 6.096 6.073 6.033 5.975 5.903 5.818 5.722 5.616 5.502 5.381 5.255 5.124 4.99 4.854 4.715 4.577 4.438 4.299 4.162 4.026 3.891 3.759 3.63 3.502 3.378 3.257 3.139 3.024 2.912 2.803 2.698 2.595 2.497 2.401 2.308 2.219 2.133 2.05 1.969 1.892 1.817 1.745 1.676 1.61 1.545 1.484 1.424 1.367 1.312 1.26 1.209 1.16 1.114 1.069 1.025 0.984 0.944 0.906 0.869 0.834 0.8 0.768 0.736 0.706 0.678 0.65 0.624 0.598 0.574 0.551 0.528 0.507 0.486 0.466 0.447 0.429 0.411 0.395 0.379 0.363 0.348 0.334 0.32 0.307 0.295 0.283 0.271 0.26 0.25 0.239 0.23 0.22 0.211 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.208" PeakHeight="110.0" Num="3" Error="0.0">
-30.364 12.95 -3.075
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.208" EndFrequency="6.1" PeakHeight="206.898" Num="5" zHalfNm="143.967" Error="4.332">
-64.557 -39.654 18.066 -2.917 -0.904
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.932" Depth="0.122"/>
<TopsideChapman PeakHeight="206.898" PeakDensity="461662.53" PeakScaleHeight="37.465" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
