<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-18 -291 15:00:00.000"
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: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.10.18 (291) 15:00:00</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">
FF202629110181500009039031101000005015000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="6.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.138" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.806" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="6.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="370.000" 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="3.396" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.363" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="238.051" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="155.938" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.843" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="90.275" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.956" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="53.671" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="142.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.120" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="17">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
340.000 340.000 345.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 370.000 370.000 374.311 379.463 385.729 393.516
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 63 63 54 66 57 63 57 66 57 63 57 63 60 54 45 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="174">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.483 90.0 95.0 100.0 105.0 110.0 111.525 113.051 114.576 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 238.051 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.285 2.939 3.285 3.396 3.273 3.273 3.396 3.411 3.592 3.78 3.972 4.167 4.358 4.543 4.719 4.884 5.041 5.189 5.33 5.465 5.594 5.72 5.842 5.962 6.08 6.197 6.314 6.432 6.552 6.674 6.799 6.917 6.95 6.949 6.939 6.918 6.887 6.846 6.797 6.74 6.675 6.604 6.527 6.444 6.357 6.265 6.17 6.071 5.969 5.865 5.759 5.652 5.543 5.434 5.323 5.213 5.102 4.992 4.882 4.773 4.664 4.556 4.45 4.344 4.24 4.137 4.035 3.936 3.837 3.741 3.646 3.552 3.461 3.371 3.283 3.197 3.113 3.031 2.95 2.871 2.794 2.719 2.645 2.573 2.503 2.435 2.368 2.303 2.24 2.178 2.118 2.059 2.002 1.946 1.892 1.839 1.788 1.737 1.689 1.641 1.595 1.55 1.507 1.464 1.423 1.383 1.343 1.305 1.268 1.232 1.197 1.163 1.13 1.098 1.067 1.037 1.007 0.979 0.951 0.924 0.897 0.872 0.847 0.823 0.799 0.776 0.754 0.733 0.712 0.691 0.671 0.652 0.634 0.616 0.598 0.581 0.564 0.548 0.532 0.517 0.502 0.488 0.474 0.46 0.447 0.434 0.422 0.41 0.398 0.387 0.376 0.365 0.354 0.344 0.334 0.325 0.315 0.306 0.298 0.289 0.281 0.273 0.265 0.257 0.25 0.243 0.236 0.229 0.222 0.216 0.21 0.204

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.396" PeakHeight="110.0" Num="3" Error="0.0">
-30.504 13.157 -3.17
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.396" EndFrequency="6.95" PeakHeight="238.051" Num="5" zHalfNm="155.938" Error="1.794">
-99.941 -37.447 19.792 -7.017 1.138
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.576" Depth="0.123"/>
<TopsideChapman PeakHeight="238.051" PeakDensity="599286.6" PeakScaleHeight="53.671" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
