<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-17 -290 11:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: F2x cusp not found, 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" >
2026.10.17 (290) 11:20:00</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">
FF202629010171120009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="6.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.354" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.312" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="330.673" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.936" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.141" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="230.662" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="167.233" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.971" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="70.315" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.087" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="41.483" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="112.930" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.020" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="30">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 295.000 295.714 296.429 297.143 297.857 298.571 299.286 300.000 301.250 302.500 303.750 305.000 305.000 310.000 315.000 315.000 315.000 320.000 322.500 325.000 325.000 325.000 325.000 327.584 330.673 334.430 339.097 345.053 352.916
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 51 0 0 0 0 66 0 66 0 66 0 63 63 69 63 66 69 63 0 0 63 0 66 66 72 63 48 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 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 -2.734375 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="141">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.557 90.0 95.0 100.0 105.0 110.0 113.507 115.0 117.014 120.0 120.521 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 230.662 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.973 2.541 2.841 2.936 2.814 2.814 2.814 2.918 2.936 3.13 3.371 3.619 3.857 4.08 4.287 4.481 4.664 4.839 5.007 5.17 5.33 5.487 5.643 5.799 5.956 6.115 6.277 6.446 6.622 6.805 6.947 6.95 6.943 6.917 6.875 6.817 6.746 6.662 6.567 6.462 6.349 6.23 6.104 5.973 5.838 5.7 5.56 5.418 5.276 5.133 4.99 4.848 4.706 4.567 4.429 4.293 4.159 4.028 3.899 3.773 3.649 3.529 3.412 3.297 3.186 3.077 2.972 2.87 2.77 2.674 2.581 2.49 2.402 2.317 2.235 2.156 2.079 2.004 1.932 1.863 1.796 1.731 1.669 1.608 1.55 1.493 1.439 1.387 1.336 1.288 1.24 1.195 1.151 1.109 1.069 1.029 0.992 0.955 0.92 0.886 0.854 0.822 0.792 0.763 0.735 0.708 0.682 0.657 0.632 0.609 0.587 0.565 0.544 0.524 0.505 0.486 0.468 0.451 0.434 0.418 0.403 0.388 0.374 0.36 0.347 0.334 0.321 0.31 0.298 0.287 0.277 0.266 0.256 0.247 0.238 0.229 0.221 0.212 0.205

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.936" PeakHeight="110.0" Num="3" Error="0.0">
-30.141 12.623 -2.925
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.936" EndFrequency="6.95" PeakHeight="230.662" Num="5" zHalfNm="167.233" Error="1.507">
-87.768 -35.772 18.061 -4.869 0.207
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.521" Depth="0.122"/>
<TopsideChapman PeakHeight="230.662" PeakDensity="599286.6" PeakScaleHeight="41.483" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
