<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-28 -301 22:40:00.000"
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 33 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: Severe F-spread, F2x cusp not found, Multiple candidates for F2o 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" >
2026.10.28 (301) 22:40:00</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">
FF202630110282240009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.929" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="19.334" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="375.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="375.000" 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="6.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.803" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="372.103" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="341.918" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.086" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="46.836" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.656" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="22.676" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="60.560" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="76">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
375.000 375.000 380.000 385.000 385.000 382.500 380.000 380.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 385.000 383.333 381.667 380.000 380.000 385.000 385.000 385.000 390.000 389.000 388.000 387.000 386.000 385.000 382.500 380.000 380.000 380.000 380.000 380.000 380.000 380.000 381.429 382.857 384.286 385.714 387.143 388.571 390.000 392.143 394.286 396.429 398.571 400.714 402.857 405.000 400.000 405.000 405.000 405.245 405.519 405.825 406.171 406.565 407.017 407.541 408.157 408.891 409.779 410.876 412.266 414.085 416.567 420.156 425.803 435.991 459.884
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 66 72 63 60 0 66 66 66 69 69 66 0 0 66 69 66 66 63 57 0 0 60 60 0 0 60 66 63 0 63 66 60 66 66 63 60 63 66 66 63 60 0 0 0 54 60 0 60 60 0 0 0 63 57 60 63 0 60 0 0 63 0 0 0 0 0 0 60 63 0 57 57 0 63 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 -0.390625 1.171875 1.171875 -0.390625 0.390625 -0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 1.953125 1.171875 1.171875 0.390625 0.390625 -0.390625 1.171875 1.171875 -1.171875 -0.390625 1.171875 0.390625 1.953125 -0.390625 1.171875 1.171875 1.171875 1.953125 1.171875 1.953125 1.953125 -0.390625 1.953125 1.953125 1.171875 2.734375 0.390625 2.734375 0.390625 0.390625 1.953125 0.390625 1.171875 1.953125 1.171875 0.390625 0.390625 1.953125 1.171875 0.390625 -0.390625 1.171875 2.734375 0.390625 0.390625 -1.953125 1.171875 -0.390625 1.171875 1.171875 1.171875 2.734375 1.171875 2.734375 1.171875 1.171875 -1.171875 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="119">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.888 145.0 150.0 155.0 160.0 165.0 170.0 175.0 177.777 180.0 185.0 190.0 195.0 200.0 205.0 210.0 211.665 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 372.103 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.33 0.309 0.281 0.242 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.21 0.233 0.256 0.278 0.301 0.324 0.346 0.354 0.393 0.473 0.577 0.697 0.823 0.951 1.08 1.21 1.341 1.475 1.612 1.753 1.899 2.049 2.206 2.368 2.538 2.715 2.902 3.097 3.304 3.523 3.755 4.003 4.268 4.552 4.858 5.189 5.546 5.924 6.298 6.568 6.6 6.59 6.528 6.417 6.266 6.083 5.876 5.651 5.413 5.169 4.921 4.673 4.427 4.187 3.953 3.726 3.508 3.299 3.1 2.91 2.73 2.559 2.398 2.246 2.102 1.967 1.84 1.721 1.609 1.504 1.406 1.313 1.227 1.146 1.071 1.0 0.934 0.872 0.815 0.761 0.71 0.663 0.619 0.578 0.54 0.504 0.47 0.439 0.41 0.383 0.357 0.333 0.311 0.29 0.271 0.253 0.236 0.221 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="6.6" PeakHeight="372.103" Num="5" zHalfNm="341.918" Error="3.538">
-129.408 -50.549 25.086 -4.293 -1.274
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="101.665" Depth="0.154"/>
<TopsideChapman PeakHeight="372.103" PeakDensity="540446.6" PeakScaleHeight="22.676" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
