<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 06:10:00.000"
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="12.0">
<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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, 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" >
2026.10.20 (293) 06:10:00</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">
FF202629310200610009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.039" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.513" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.400" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="377.138" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="350.360" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.904" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.605" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="59.829" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.335" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="29.948" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="62.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.670" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="37">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.65 6.7 6.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 330.000 340.000 347.500 355.000 350.000 360.000 370.000 380.000 400.000 415.000 420.000 435.000 450.000 421.250 392.500 363.750 335.000 340.000 345.000 350.000 355.000 355.000 360.000 365.000 366.665 368.614 370.926 373.713 377.138 381.449 387.041 394.582 405.310 421.784 450.310 511.740
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 60 0 60 69 0 0 57 51 54 0 0 54 0 54 0 72 69 69 0 66 72 0 69 63 69 66 63 0 0 0 0 54 57 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 0.390625 -1.171875 1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 0.390625 -1.171875 0.390625 -1.953125 -1.171875 -0.390625 -1.171875 -1.171875 0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -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="134">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.068 150.0 155.0 160.0 165.0 170.0 175.0 180.0 180.137 185.0 190.0 195.0 200.0 205.0 210.0 215.0 215.205 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 350.36 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.331 0.312 0.286 0.251 0.201 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.221 0.243 0.265 0.287 0.309 0.331 0.353 0.354 0.436 0.532 0.645 0.779 0.938 1.122 1.332 1.563 1.811 2.074 2.347 2.629 2.918 3.214 3.517 3.825 4.139 4.457 4.779 5.102 5.424 5.739 6.039 6.311 6.536 6.69 6.75 6.75 6.735 6.686 6.609 6.506 6.382 6.239 6.083 5.914 5.736 5.552 5.363 5.172 4.979 4.787 4.597 4.409 4.224 4.044 3.868 3.696 3.53 3.369 3.214 3.065 2.921 2.783 2.65 2.523 2.401 2.284 2.173 2.067 1.965 1.868 1.776 1.688 1.604 1.524 1.448 1.375 1.306 1.241 1.178 1.119 1.063 1.009 0.958 0.91 0.864 0.82 0.779 0.739 0.702 0.666 0.633 0.601 0.57 0.541 0.514 0.488 0.463 0.439 0.417 0.396 0.376 0.357 0.339 0.321 0.305 0.29 0.275 0.261 0.248 0.235 0.223 0.212 0.201

</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="6.75" PeakHeight="350.36" Num="5" zHalfNm="309.904" Error="7.147">
-126.937 -14.418 9.769 -4.912 1.343
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="105.205" Depth="0.154"/>
<TopsideChapman PeakHeight="350.36" PeakDensity="565291.56" PeakScaleHeight="29.948" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
