<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-27 -300 21:30:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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" >
2026.10.27 (300) 21:30:00</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">
FF202630010272130009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.974" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.521" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="422.028" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.406" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="336.514" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="293.624" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.860" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="63.197" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="8.085" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="31.595" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="66.470" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.660" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="36">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 351.667 353.333 355.000 355.000 357.500 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 378.333 381.667 385.000 385.000 385.000 385.000 390.000 391.781 393.800 396.106 398.767 401.871 405.538 409.937 415.312 422.028 430.657
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 0 78 0 0 75 75 66 72 75 63 66 72 75 63 66 69 72 0 0 63 69 72 72 66 69 57 66 0 60 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 0.390625 1.171875 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="136">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.587 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.23 140.0 145.0 150.0 155.0 160.0 165.0 168.461 170.0 175.0 180.0 185.0 190.0 195.0 197.691 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 336.514 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.268 0.352 0.393 0.406 0.401 0.388 0.363 0.326 0.271 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.246 0.281 0.317 0.352 0.387 0.406 0.463 0.572 0.684 0.809 0.952 1.118 1.309 1.524 1.762 2.019 2.289 2.569 2.856 3.148 3.443 3.743 4.045 4.349 4.656 4.964 5.272 5.577 5.877 6.163 6.427 6.652 6.816 6.895 6.9 6.892 6.854 6.788 6.698 6.587 6.457 6.312 6.155 5.989 5.814 5.635 5.451 5.266 5.079 4.893 4.709 4.526 4.347 4.171 3.999 3.832 3.669 3.512 3.359 3.211 3.069 2.932 2.8 2.673 2.551 2.434 2.322 2.214 2.111 2.013 1.918 1.828 1.742 1.66 1.582 1.507 1.435 1.367 1.302 1.24 1.181 1.124 1.071 1.019 0.971 0.924 0.88 0.838 0.797 0.759 0.723 0.688 0.655 0.623 0.593 0.565 0.538 0.512 0.487 0.464 0.441 0.42 0.4 0.38 0.362 0.345 0.328 0.312 0.297 0.283 0.269 0.256 0.244 0.232 0.221 0.21 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.406" PeakHeight="110.0" Num="3" Error="0.0">
-20.373 3.189 -0.229
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.406" EndFrequency="6.9" PeakHeight="336.514" Num="5" zHalfNm="293.624" Error="2.455">
-130.845 -15.365 10.362 -5.126 2.151
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.691" Depth="0.206"/>
<TopsideChapman PeakHeight="336.514" PeakDensity="590694.8" PeakScaleHeight="31.595" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
