<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 08:30:00.000"
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="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 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" >
2026.10.20 (293) 08:30:00</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">
FF202629310200830009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.200" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="17.118" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="309.862" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="309.862" 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="5.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="337.295" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.943" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="290.629" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="233.943" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.819" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="80.249" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.530" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.114" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="80.480" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.200" 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" >
4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
309.862 310.733 311.693 312.757 313.943 315.274 316.778 318.490 320.457 322.740 325.423 328.621 332.498 337.295 345.000 350.000 360.000 380.000 405.000 450.000 559.344
</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" >
1.171875 -2.734375 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.171875 -0.390625 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 1.171875 1.953125
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="149">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.336 95.0 100.0 105.0 110.0 115.0 120.0 125.0 128.413 130.0 135.0 140.0 145.0 146.826 150.0 155.0 160.0 165.0 165.239 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 290.629 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.628 0.817 0.913 0.943 0.927 0.878 0.791 0.703 0.703 0.703 0.703 0.703 0.703 0.744 0.81 0.875 0.94 0.943 1.071 1.222 1.387 1.563 1.749 1.946 2.154 2.372 2.6 2.838 3.083 3.334 3.586 3.835 4.076 4.304 4.515 4.705 4.872 5.015 5.133 5.226 5.293 5.334 5.35 5.35 5.345 5.326 5.296 5.255 5.203 5.143 5.074 4.999 4.917 4.83 4.738 4.643 4.544 4.443 4.34 4.236 4.13 4.025 3.919 3.813 3.708 3.604 3.5 3.398 3.298 3.199 3.101 3.006 2.912 2.821 2.731 2.644 2.559 2.476 2.395 2.316 2.239 2.165 2.093 2.022 1.954 1.888 1.824 1.762 1.701 1.643 1.587 1.532 1.479 1.428 1.378 1.33 1.284 1.239 1.196 1.154 1.114 1.075 1.037 1.001 0.965 0.932 0.899 0.867 0.836 0.807 0.778 0.751 0.724 0.699 0.674 0.65 0.627 0.605 0.584 0.563 0.543 0.524 0.505 0.487 0.47 0.453 0.437 0.422 0.407 0.392 0.378 0.365 0.352 0.339 0.327 0.316 0.304 0.294 0.283 0.273 0.263 0.254 0.245 0.236 0.228 0.22 0.212 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.943" PeakHeight="110.0" Num="3" Error="0.0">
-26.24 7.724 -1.148
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.943" EndFrequency="5.35" PeakHeight="290.629" Num="5" zHalfNm="233.943" Error="2.026">
-127.248 3.448 -2.577 1.447 -0.46
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="55.239" Depth="0.24"/>
<TopsideChapman PeakHeight="290.629" PeakDensity="355117.88" PeakScaleHeight="43.114" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
