<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-24 -297 14:00:00.000"
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="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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.24 (297) 14:00:00</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">
FF202629710241400009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="10.450" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.487" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.987" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="10.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="10.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="550.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="550.000" 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="10.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="550.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.376" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="10.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="10.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.354" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="313.721" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="204.043" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.437" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="148.604" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.614" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="81.504" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="160.450" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.930" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
10.25 10.3 10.35 10.4 10.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
550.000 555.000 563.733 576.745 598.200
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 45 48 42
</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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.486 90.0 95.0 100.0 105.0 110.0 111.608 113.216 114.824 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 313.721 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.271 2.922 3.266 3.376 3.253 3.253 3.376 3.383 3.582 3.782 3.985 4.192 4.403 4.621 4.844 5.072 5.304 5.54 5.778 6.018 6.259 6.498 6.736 6.972 7.204 7.433 7.657 7.876 8.09 8.299 8.501 8.697 8.886 9.068 9.241 9.407 9.563 9.709 9.844 9.968 10.08 10.178 10.263 10.332 10.386 10.424 10.445 10.45 10.45 10.444 10.431 10.411 10.384 10.351 10.312 10.267 10.216 10.161 10.1 10.035 9.965 9.892 9.814 9.733 9.649 9.562 9.472 9.379 9.284 9.187 9.088 8.987 8.885 8.781 8.676 8.57 8.463 8.355 8.247 8.138 8.029 7.92 7.81 7.701 7.591 7.482 7.373 7.265 7.157 7.049 6.942 6.836 6.73 6.625 6.521 6.417 6.315 6.213 6.113 6.013 5.914 5.817 5.72 5.625 5.531 5.437 5.345 5.254 5.165 5.076 4.989 4.902 4.817 4.733 4.651 4.569 4.489 4.41 4.332 4.255 4.179 4.105 4.031 3.959 3.888 3.818 3.749 3.681 3.615 3.549 3.485 3.421 3.359 3.297 3.237 3.178 3.12 3.062 3.006 2.951 2.896 2.843 2.79 2.739 2.688 2.638 2.589 2.541 2.494 2.448 2.402 2.357 2.313 2.27 2.228 2.186 2.145 2.105 2.066 2.027 1.989 1.952 1.915 1.88 1.844 1.81 1.776 1.742 1.71 1.677 1.646 1.615 1.584 1.555 1.525 1.497 1.468 1.441 1.414 1.387 1.361 1.335 1.31 1.285 1.261 1.237

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.376" PeakHeight="110.0" Num="3" Error="0.0">
-30.49 13.136 -3.16
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.376" EndFrequency="10.45" PeakHeight="313.721" Num="5" zHalfNm="204.043" Error="1.999">
-196.184 -4.611 2.944 -1.679 0.633
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.824" Depth="0.123"/>
<TopsideChapman PeakHeight="313.721" PeakDensity="1354869.8" PeakScaleHeight="81.504" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
