<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 15:20:00.000"
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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2o cusp not found, Multiple candidates for F2x cusp, 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" >
2026.10.17 (290) 15:20:00</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">
FF202629010171520009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="7.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.257" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.121" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="7.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="365.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.385" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.358" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="232.840" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="157.383" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.997" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="79.627" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.315" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.587" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.210" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.010" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="28">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
5.75 5.8 5.85 5.9 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" >
310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 330.000 330.000 330.000 335.000 340.000 340.000 345.000 345.000 350.000 355.000 355.000 360.000 360.000 362.500 365.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 66 66 63 60 69 72 69 69 72 69 66 57 66 72 69 60 69 63 69 66 60 66 63 66 0 63
</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 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="161">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.485 90.0 95.0 100.0 105.0 110.0 111.569 113.139 114.708 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 232.84 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.277 2.929 3.275 3.385 3.262 3.262 3.385 3.396 3.603 3.824 4.042 4.249 4.441 4.62 4.788 4.947 5.099 5.245 5.386 5.524 5.659 5.793 5.925 6.058 6.191 6.326 6.464 6.606 6.754 6.909 7.059 7.1 7.099 7.085 7.059 7.02 6.97 6.909 6.839 6.76 6.674 6.581 6.482 6.377 6.269 6.156 6.04 5.921 5.8 5.678 5.554 5.43 5.305 5.18 5.056 4.932 4.809 4.687 4.566 4.447 4.329 4.213 4.099 3.987 3.877 3.769 3.663 3.559 3.457 3.358 3.261 3.166 3.073 2.983 2.895 2.809 2.725 2.644 2.564 2.487 2.412 2.339 2.268 2.199 2.131 2.066 2.003 1.941 1.881 1.823 1.767 1.712 1.659 1.608 1.558 1.509 1.462 1.417 1.373 1.33 1.288 1.248 1.209 1.171 1.134 1.099 1.064 1.031 0.998 0.967 0.937 0.907 0.879 0.851 0.824 0.798 0.773 0.749 0.725 0.702 0.68 0.659 0.638 0.618 0.598 0.579 0.561 0.543 0.526 0.51 0.493 0.478 0.463 0.448 0.434 0.42 0.407 0.394 0.382 0.37 0.358 0.347 0.336 0.325 0.315 0.305 0.295 0.286 0.277 0.268 0.26 0.251 0.243 0.236 0.228 0.221 0.214 0.207 0.201

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.385" PeakHeight="110.0" Num="3" Error="0.0">
-30.496 13.146 -3.165
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.385" EndFrequency="7.1" PeakHeight="232.84" Num="5" zHalfNm="157.383" Error="1.562">
-93.11 -39.627 19.14 -4.664 0.129
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.708" Depth="0.123"/>
<TopsideChapman PeakHeight="232.84" PeakDensity="625434.25" PeakScaleHeight="48.587" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
